‘What is nursing knowledge?’ is a complex question, the answer
to which helps define nurses as a profession? [Hall 2005: 34]
Is there such a thing as ‘nursing knowledge’? What do and should we
mean by that phrase? And does it help define nursing itself? It may seem that denying
that there is such a thing, or unified kind, as nursing knowledge risks undermining
the profession of nursing and runs counter to its new graduate status in the UK.
But I will argue that on one understanding of the question, at least, it is correct
to answer ‘no’ but that this is no threat to a picture of nursing as richly knowledge-based.
To do this, I will consider three important distinctions of kind
and argue that, in each case, nursing knowledge is distributed across both sides.
This suggests that implausible to think that it is unified. At the same time,
however, I will suggest that in each case there is reason to think that what is
involved is, indeed, a form of knowledge. Finally, I will suggest that there is
a key intellectual skill at the heart of nursing but that this takes the form
of an art rather than a science.
Knowledge and justification
But to begin, what is knowledge or what does ‘knowledge’ mean? Note
that there might not be a very helpful
answer to this question. Imagine someone asks what stickiness is or what the word ‘sticky’ means. One might offer a word
that means more or less the same: such as ‘tacky’. But this does not help explain
the concept of stickiness so much as swap one word for it for another. Or one might
offer a more substantial explanation of the concept such as ‘a propensity of a body
to adhere to another on contact’. This may more or less equate to the concept but
it isn’t obvious that a speaker who understands the word ‘sticky’ should be able
to offer such a formal paraphrase. Further, it raises further questions such as
what does the word ‘adhere’ mean? So we should approach the question of what knowledge
in general is with some caution. There may not be a very helpful definition available.
But some features of knowledge can be abstracted. Suppose that Sandy
knows that, because it is 5pm, Mr Smith is due for medication. If so, she must hold
it to be, or take it to be, true that it is time for his medication. That is, she
must believe it. Second, if Sandy does
know that Mr Smith is due for medication, then he must really be due for medication.
If she has knowledge, what she believes
must be true. Third, her belief cannot
merely be accidentally true. Suppose her belief that the time is nearly 5pm is based
on the ward clock but that this stopped the day before. By chance, however, it is
now nearly 5pm. If so, although Sandy has a true belief about Mr Smith’s medication
she does not know it.
These constraints on knowledge have motivated an account of knowledge
which dates back to Plato: knowledge is justified, true belief. The justification
condition is supposed to rule out cases of merely lucky true beliefs.
Justification also plays a second role. It provides a means of aiming
at true beliefs. It is one thing to worry that one’s beliefs about the efficacy
of rival surgical techniques may not be correct, but quite another to work out how
to avoid error. It would not be helpful to be told to replace any false beliefs
with true beliefs. To hold a belief is to hold it to be true. (To hold that something
is not the case is not to believe it.) Thus beliefs which are, in fact, false are
not be transparently so to someone who holds them. But the advice that one should
ensure that one holds only beliefs that are justified is helpful. And by aiming
at justified beliefs one should in general succeed in reaching true beliefs since
justification is, in general, conducive of truth.
Sadly the analysis of knowledge as justified true belief faces a challenge.
In the 1960s Edmund Gettier showed how to construct counter examples to the analysis
in which a subject has a true belief and a justification for it but the justification
only works through the intervention of luck and so, intuitively, is not a case of
knowledge [Gettier 1963]. Hence
the analysis must be false. One example runs as follows. Smith and Jones have applied for a job. Smith
has good reason to hold that Jones will get the job (he has been told by the CEO)
and that Jones has ten coins in his pocket (Smith has counted them) from which he
concludes that the successful applicant has ten coins in his pocket. By chance,
he himself gets the job rather than Jones and, again by chance, he himself has ten
coins in his pocket. Did he know after all that the successful applicant has
ten coins in his pocket? Intuitively, no because even though he believed it,
had a justification and it was true, it took a stroke of luck for his belief to
be true.
One possible response to Gettier’s example (and cases like it) would
be to raise the standard of what we mean by ‘justification’. One might argue that
Smith was not in fact justified in believing that Jones would get the job (despite
being told this by the CEO) because Jones did not, after all, get the job. If so,
the example is not a counter-example to the traditional analysis. But if justification
has to guarantee the truth of what it justifies then justifications may be in short
supply.
Or one might concede that Gettier has indeed refuted the traditional
analysis and turn instead to a different third condition such as that knowledge
is true belief arrived at by a reliable process.
This modern view of knowledge called ‘reliabilism’. Again, the extra condition in
addition to true belief is supposed to eliminate knowledge-undermining luck. Sadly
if the necessary reliability of the process is anything less than 100%, Gettier
style counter-examples can also be offered for reliabilism [Goldman 1976].
There is no general agreement as to how best to respond to
Gettier’s challenge to accounts of knowledge. One possible approach, however,
is to accept the idea of raising the bar on justification, so that to be
justified is to be in a position to have knowledge, but to deny that
justifications fall into general kinds that can be identified independently of
the knowledge they underpin [McDowell 1982]. Thus for example, the general kind
or type of justification that is being
informed by a CEO who will get a job is not (always) sufficient for
knowledge. But being told on a particular occasion by a particular person may
be. Similar, whilst simply looking at a clock (which may have stopped) is not sufficient
to know the time, looking at a particular clock on a particular day may be
enough to grant Sandy, in the example mentioned above, knowledge of the time.
Such an approach has the key virtue of maintaining the knowledge’s
pedigree (which is what the standard model was supposed to do). Knowledge is
reliable (with a small ‘r’) and rationally commands trust. That is why it is
also the rational aim as the underpinning of nursing practice. nevertheless,
there is reason to think that whilst all nursing knowledge has what the status
of knowledge requires that it is not more generally unified by subject matter
of methodological approach. I will now examine three key distinctions across
which nursing knowledge divides.
Explanation and understanding
The first distinction I wish to consider dates back to debates about psychology in the late nineteenth century,
the so-called Methodenstreit. This concerned
whether the human sciences (the Geisteswissenschaften)
should try to emulate their far more successful cousins the natural sciences (Naturwissenschaften), or whether they should
go their own methodological way. ‘Positivists’, including John Stuart Mill, in England
and both Auguste Comte and Emile Durkheim in France, argued that the human sciences
were no different from the natural sciences. Others argued that the human or cultural
sciences were different from the natural sciences either in terms of the nature
of their subject matter or their methodology or both. The latter, in Germany, included
Heinrich Rickert, Wilhelm Dilthey and Wilhelm Windelband.
Of particular relevance to mental health nursing, however, was the
philosopher and psychiatrist Karl Jaspers. At the start of the twentieth century,
German psychiatry was dominated by academic neuroscientists working under the assumption,
epitomised by the German psychiatrist Wilhelm Griesinger’s famous aphorism, that
‘Mental illnesses are brain illnesses’. But Jaspers felt that the natural science
approach to psychiatry had been taken too far and needed balancing. Thus, drawing
on his understanding of the Methodenstreit, he stressed the importance
of understanding in addition to explanation. Whilst explanation tracked objective
measurable symptoms, understanding was necessary to grasp subjective symptoms. Taking
empathy to be a key aspect of understanding he said:
Objective symptoms can all be directly and convincingly demonstrated
to anyone capable of sense-perception and logical thought; but subjective symptoms,
if they are to be understood, must be referred to some process which, in contrast
to sense perception and logical thought, is usually described by the same term
‘subjective’. Subjective symptoms cannot be perceived by the sense-organs, but have
to be grasped by transferring oneself, so to say, into the other individual’s psyche;
that is, by empathy. They can only become an inner reality for the observer by his
participating in the other person’s experiences, not by any intellectual effort.
[Jaspers 1968: 1313]
A different but similarly motivated distinction was promoted by the
post-Kantian philosopher of science Wilhelm
Windelband. He distinguished between scientific approaches which explained
phenomena in general terms, as instances of general laws of nature, which he called
‘nomothetic’ (‘nomos’ means law in Greek) from equally scientific but nevertheless
individually focussed sciences such as history which he called ‘idiographic’.
In their quest
for knowledge of reality, the empirical sciences either seek the general in the
form of the law of nature or the particular in the form of the historically defined
structure. On the one hand, they are concerned with the form which invariably remains
constant. On the other hand, they are concerned with the unique, immanently defined
content of the real event. The former disciplines are nomological sciences. The
latter disciplines are sciences of process or sciences of the event. The nomological
sciences are concerned with what is invariably the case. The sciences of process
are concerned with what was once the case. If I may be permitted to introduce some
new technical terms, scientific thought is nomothetic in the former case
and idiographic in the latter
case. [Windelband 1980: 175-6]
These distinctions between explanation in terms of natural laws and
understanding via something like empathy or an idiographic focus on the individual
have an echo in the balance in contemporary mental healthcare between evidence based
medicine or practice, on the one hand, and person centred care, on the other. Whilst
EBM emphasises the importance of generalities by privileging evidence derived from
large scale randomised control trials, person centred care stresses the importance
of a focus on individual patients. This balance of demands on healthcare, resembles
the balance called for by Jaspers, and is reflected, for example, in the recent
call by the World Psychiatric Association
for the development of a ‘comprehensive’
model of diagnosis or assessment as part of its ongoing Institutional Program for
Psychiatry for the Person. A WPA workgroup charged with formulating ‘International
Guidelines for Diagnostic Assessment’ (IGDA) has published a guideline called ‘Idiographic
(Personalised) Diagnostic Formulation’ which recommends an idiographic component
alongside criteriological diagnosis.
This comprehensive concept of diagnosis is implemented through
the articulation of two diagnostic levels. The first is a standardised multi-axial
diagnostic formulation, which describes the patient’s illness and clinical condition
through standardised typologies and scales... The second is an idiographic diagnostic
formulation, which complements the standardised formulation with a personalised
and flexible statement. [IDGA Workgroup, WPA 2003: 55]
Intuitive though the distinction between nomothetic and idiographic
seems, however, there are some challenges in analysing what it means. After all,
it cannot just be the difference between a focus on repeated and unique events since
nomothetic sciences such as cosmology may study and attempt to explain unique events
such as the Big Bang. It would have to be somehow essentially individualistic. But
in Windelband’s own account, the way that idiographic approaches
address their subject matter is not satisfactorily explained [Thornton 2008].
Further there is a challenge which arise from the idea that a truly idiographic
form of understanding could never amount to knowledge. As summarised in the
first section, knowledge has a pedigree, is reliable, is not a matter of luck.
But a form of judgement essentially aimed at a unique event and which carried
no general connections to other possible – even if not actual – cases could not
be thought of as the product of a reliable sensitivity to how things are in
that particular case. Knowledge requires some sort of generality.
The more promising distinction seems to be that between explanation
and understanding in which the latter refers to the ways in which sense of human
subjects is made by exploring their experiences, beliefs and utterances hang together
in rational patterns. Borrowing phrases from the philosophers Wilfrid Sellars and
John McDowell, the distinction between explanation and understanding can be thought
of as the difference between subsuming events under natural laws (thought of as
descriptions of what typically happens), the ‘realm of law’, and fitting them into
normative patterns of good reasons, the ‘space of reasons’.
With this distinction in place, the knowledge that nurses need in
order to care for patients and service users clearly spans both sides. They need
to grasp the laws that govern the workings of human physiology and which describe
the course of illnesses including mental illnesses. But they also need to be able
to understand mental health service users
or patients: their hopes, fears, beliefs, desires and experiences. With
understanding itself understood to be a matter of placing subjects into a space
of reasons, however, this is still a form of knowledge even if of a different
kind to that of explanation of other natural events.
Knowledge of facts and values
In the previous section, I outlined the importance of a distinction
between explanation couched in lawlike generalities (‘nomological’ or ‘nomothetic’)
and understanding individuals in a distinctive way by trying to fit their utterances,
experiences and actions in the ‘space of reasons’. A paradigmatic instance of the
former approach is the deployment of generalities inferred from randomised control
trials (RCTs) or, better, the meta-analysis of RCTs which is the gold standard for
evidence in Evidence Based Medicine or Evidence Based Practice.
In their influential book, Evidence-based
Medicine: How to practice and teach EBM, David Sackett, Sharon Straus, Scott
Richardson, William Rosenberg, and Brian Haynes define it as follows. ‘Evidence
based medicine is the integration of best research evidence with clinical expertise
and patient values.’ [Sackett et al 2000]. This is a surprising definition. Normally
the focus of EBM is on the first element of that tripartite division: research evidence.
But Sackett et al widen their definition to include two further aspects: expertise
and values. They give a further brief preliminary sketch of each as follows.
By best research evidence we mean clinically relevant
research… New evidence from clinical research and treatments both invalidates previously
accepted diagnostic tests and treatments and replaces them with new ones that are
more powerful, more accurate, more efficacious and safer.
By clinical expertise we mean the ability to use our clinical skills and
past experience to rapidly identify each patient’s unique health state and diagnosis,
their individual risks and benefits of potential interventions, and their personal
values and expectations
By patient values we mean the unique preferences, concerns and expectations
each patient brings to a clinical encounter and which must be integrated into clinical
decisions if they are to serve the patient. [ibid: 3]
This looks to a broad definition not just of EBM as such but something
that should be based on it: good clinical practice, perhaps, or good medical care.
But it serves a convenient reminder of another relevant distinction for nursing
knowledge: that between facts and values.
Nurses need not only to know about research evidence concerning the
workings of the brain and mind, or the prognoses for particular psychiatric diagnoses
– the biomedical facts – but they need to know about values: those of their patients
and service users but also their own and those of broader society. They need to
know, in other words, not just about evidence based practice but also about values
based practice.
Outlining the nature of values based practice, or the competing views
of what it should involve, is beyond the scope of this chapter. But a preliminary
survey suggests that knowledge of facts and values can be very different. There’s
no equivalent of RCTs for the empirical determination of how we ought to act. The
closest equivalent to knowledge of the empirical laws governing natural phenomena
might be, in the case of medical ethical values, knowledge of ethical principles
such as the Four Principles approach of respect for beneficence, non-maleficence,
autonomy and justice [Beauchamp and Childress 2001]. But whereas the physical
forces, for example, can be added together using the mathematics of vector addition,
there is no general calculus for saying when, for example, the principle of autonomy
should trump beneficence and when the other way round. Further, ethical values are
merely one subset of the values, preferences, traditions that need to be taken into
consideration in vales based practice and thus the prospect for codifying all the
value judgements relevant for clinical decisions are dim.
Some proponents of values based practice argue for an even more dramatic
difference in the nature of knowledge of facts and values. Bill Fulford, for example,
argues that successful values based practice does not so much aim for a correct
judgement as a good process [Fulford 2005]. It is a matter of following the appropriate
deliberative process rather than aiming to get the values in a particular situation
objectively right. If so, the knowledge involved is knowledge of how to follow
a procedure. This contrasts with a natural view of the aims of EBM in aiming to
discover the psychiatric facts. Others argue that even though there is no algorithm
for forming a view of what to do in a particular situation, that does not rule out
the idea that value judgements aim at correctness [Thornton 2011]. On this
view, whilst knowledge of values is not reducible to or codified in general
principles it is still a form of general recognitional ability to chart evaluative
demands made on subjects with eyes to seen them by worldly situations.
But whatever the best view of values based practice – and it is an
interesting question whether this means the most correct or the most desirable –
there is no doubt that values based practice and evidence based practice call on
different kinds of expertise based on a sensitivity to different features of the
world: the bio-medical facts and patients’ and others’ values.
Tacit and explicit knowledge
The characterisation of evidence based medicine from Sackett et al
also highlights a further distinction of kind within what nurses need to know. They
define expertise as the ‘ability to use our clinical skills and past experience
to rapidly identify each patient’s unique health state and diagnosis, their individual
risks and benefits of potential interventions, and their personal values and expectations’
[Sackett et al 2000: 3].
This characterisation contains two elements already mentioned in the
previous distinctions. Clinical expertise is directed towards individuals and their
unique states and circumstances, picking up the understanding side of the first
distinction (explanation versus understanding). It is also directed at their values
and expectations, picking up the values side of the second distinction (knowledge
of facts versus values). But it also suggests a practical recognitional skill is
in play and that suggests a third, important, distinction: between explicit and
tacit knowledge.
The idea of tacit knowledge (or ‘tacit knowing’, as he preferred)
was first promoted by Michael Polanyi. In his book The Tacit Dimension he says:
I shall reconsider
human knowledge by starting from the fact that we can know more than we can tell.
This fact seems obvious enough; but it is not easy to say exactly what it means.
Take an example. We know a person’s face, and can recognize it among a thousand,
indeed among a million. Yet we usually cannot tell how we recognize a face we know.
So most of this knowledge cannot be put into words. [Polanyi 1967: 4]
The suggestion is that
tacit knowledge is tacit because it is
‘more than we can tell’. We cannot tell
how we know things that we know tacitly.
But why not? There is, however, a constraint on any plausible answer to this question
which turns on an apparent tension in the very idea of tacit knowledge. To be a
form of knowledge, there must be something – some content – known. As was set out in the first section, on the standard
model of knowledge, this content is a belief (eg. that , Mr Smith is due
for medication). But if so, why can this
not be put into words? What kind of content could be known but not be put into words?
Being knowledge and being tacit seem to be conflicting ideas.
A clue as to how to resolve
this comes from a frequently cited example of tacit knowledge from a totally different
area: the chicken industry. There is a great economic advantage to be able
to determine the gender of chicks as soon as possible after they hatch. In the 1920s,
Japanese scientists discovered a method by which this could be done based on subtle
perceptual cues with a suitably held and gently squeezed chick. It was, nevertheless,
a method that required a great deal of skill developed through practice. After four
to six weeks practice, a newly qualified chick-sexer might be able to determine
the sex of 200 chicks in 25 minutes with an accuracy of 95% rising with years of
practice to 1,000 - 1,400 chicks per hour with an accuracy of 98% [Gellatly 1986:
4].
One reason that this is cited as an instance of tacit knowledge is
that early Australian investigators were unable to determine the nature of the skill
involved. Further, the story has developed that the chick-sexers themselves were
unable to express the nature of their knowledge (aside from saying which were male
and which female). Hence it seems that this is a form of knowledge which cannot
be put into words alone.
The example suggests a
resolution to the tension mentioned above. Chick sexing counts as knowledge because
the content known is practical, underpinned by a general and reliable ability. The
relevant content is how to tell the difference
between male and female chicks through manipulation and observation. But it
counts as tacit because it cannot be put into words without also a practical demonstration
involving chicks. So it cannot be put into words alone. Further, as the Australian
investigators reveal, such demonstrations only work for others with ‘eyes to see’
or rather the relevant practical knowledge. On this model, tacit knowledge is practical
knowledge the articulation of which requires a practical demonstration in the right
context. It is situation specific practical knowledge.
As a practical discipline,
mental health nursing contains aspects of tacit knowledge so understood. This includes
all the situation specific knowledge of how to do things: basic clinical skills
but also recognitional skills summarised by Sackett et al. These are the kind of
recognitional skills which Benner describes using Dreyfus’ five stage hierarchy
connecting novice to expert practitioner. [Benner 2004; Dreyfus and
Dreyfus 1986]. There is, however, a further
argument from Polanyi which suggests that mental health nursing might involve a
further key area for tacit knowledge based
in an area of mental healthcare that might be thought to be paradigmatically explicit. This concerns mental illness diagnosis.
Two historic factors have
encouraged an approach to diagnosis which stresses explicit knowledge. Firstly,
on its foundation in 1945, the World Health Organisation set about establishing
an International Classification of Diseases (ICD). Whilst the chapters of the classification
dealing with physical illnesses were well received, the psychiatric section was
not widely adopted and so the philosopher Carl Hempel was invited to address the
American Psychological Association conference of 1959. He recommended the use of
operational definitions (following Bridgman’s book The Logic of Modern Physics), although construed loosely to fit a notion
of measurement appropriate for mental illness [Bridgman 1927]. This view has been
influential up to the present WHO psychiatric taxonomy in ICD-10.
The second reason for the
emphasis on reliability and hence operationalism was a parallel influence from within
American psychiatry that shaped the writing of DSM-III. Whilst DSM-I and DSM-II
had drawn heavily on psychoanalytic theoretical terms, the committee charged with
drawing up DSM-III drew on the work of a group of psychiatrists from Washington
University of St Louis. Responding in part to research that had revealed significant
differences in diagnostic practices between different psychiatrists, the ‘St Louis
group’, led by John Feighner, published operationalised criteria for psychiatric
diagnosis. The DSM-III task force replaced reference to Freudian aetiological theory
with more observational criteria.
This stress on operationalism
has had an effect on the way that criteriological diagnosis is made explicit or
codified in DSM and ICD manuals. Syndromes are described and characterised in terms
of disjunctions and conjunctions of symptoms. The symptoms are described in ways
influenced by operationalism and with as little aetiological theory as possible.
(That they are neither strictly operationally defined nor strictly aetiologically
theory free is not relevant here.) Thus one can think of such a manual as providing
guidance for, or a justification of, a diagnosis offered by saying that a subject
is suffering from a specific syndrome. Presented with an individual, the diagnosis
of a specific syndrome is said to be justified because he or she has enough of the
relevant symptoms which can be, as closely as possible, ‘read off’ from their presentation.
Such an approach to psychiatric diagnosis plays down the role of individual judgement
or tacit knowledge amongst clinicians.
Nevertheless, according
to Polanyi, even apparently explicit knowledge such as this rests on a substrate
of tacit. The reason for this is that
[I]n all applications
of a formalism to experience there is an indeterminacy involved, which must be resolved
by the observer on the ground of unspecified criteria. Now we may say further that
the process of applying language to things is also necessarily unformalized: that
it is inarticulate. Denotation, then, is an art, and whatever we say about things
assumes our endorsement of our own skill in practising this art. [ibid: 81]
Consider someone who can
recognise the letters of the alphabet including, for example, the letter ‘e’. Although
learnt through exposure to a finite number of examples, such an ability is general
and open ended. It enables the expert to recognise a potentially infinite number
of letter ‘e’s. But such examples will vary across different fonts, for example,
or be printed at different sizes or in different colours, or be hand written with
varying degrees of irregularity or surrounded by different other letters (in different
words). Polanyi’s passage suggests the following possibility. The ability to recognise
all these different particular letters as instances of the same general kind (the
letter ‘e’) may outrun the expert’s ability to explain or articulate just how the
shape has to be for it to count as an ‘e’. It may be ‘unformalized’ or ‘inarticulate’.
The expert may ‘know more than they can tell’.
If this holds for recognising
a letter it holds even more obviously for the recognition of mental illness symptoms.
The signs and symptoms of depression or bipolar disorder can be recognisably of
the same type whilst varying in numerous ways between the people who have them.
Criticising the ability of the DSM criteria to capture the nature
of schizophrenia, the President of the World Psychiatric Association Mario Maj,
for example, argues that:
[W]e have come to a critical point in which it is difficult to
discern whether the operational approach is disclosing the intrinsic weakness of
the concept of schizophrenia (showing that the schizophrenic syndrome does not have
a character and can be defined only by exclusion) or whether the case of schizophrenia
is bringing to light the intrinsic limitations of the operational approach (showing
that this approach is unable to convey the clinical flavour of such a complex syndrome).
In other terms, there may be, beyond the individual phenomena, a ‘psychological
whole’ (Jaspers, 1963) in schizophrenia, that the operational approach fails to
grasp, or such a psychological whole may simply be an illusion, that the operational
approach unveils. [Maj 1998: 459-60]
In fact, Maj favours the former hypothesis. He argues that the DSM
criteria fail to account for aspects of a proper grasp of schizophrenia, for example,
the intuitive ranking of symptoms (which have equal footing in the DSM account).
He suggests that there is, nevertheless, no particular danger in the use of DSM
criteria by skilled, expert clinicians for whom it serves merely as a reminder of
a more complex underlying understanding. But there is problem in its use to encode
the diagnosis for those without such an additional prior understanding:
If the few words composing the DSM-IV definition will probably
evoke, in the mind of expert clinicians, the complex picture that they have learnt
to recognise along the years, the same cannot be expected for students and residents.
[ibid: 460]
Maj’s criticism that the DSM criteria do not capture a proper, expert
understanding of the diagnosis of schizophrenia suggests that even aspects of mental
health nursing where the greatest effort has been made to codify and make knowledge
explicit still rests on a bedrock of tacit knowledge. Not everything can be put
into words.
Is there such a thing as nursing
knowledge?
I can now return to the question of whether there is such a thing
as ‘nursing knowledge’ and whether it helps to define nursing itself? In a recent
article called ‘Defining nursing knowledge’, Angela Hall says suggests that the
answer to both is ‘yes’. She says ‘”What is nursing knowledge?” is a complex question,
the answer to which helps define nurses as a profession’ [Hall 2005: 34].
Consider a possible contrast between those roles or disciplines whose
related expertise or knowledge defines the role or discipline and those where the
relationship is the other way round. One might think that theoretical physics or
neurology, or mathematics, belonged to the former category. The idea is that what
unifies the role or discipline of practitioners is the nature of the knowledge in
question. Thus mathematicians could be identified as those possessors of mathematical
knowledge which could in turn be understood directly. For this to be the case, the
body of knowledge has to be in some way intrinsically unified, a natural kind.
This side of the contrast faces a challenge even in the case of the
relation between mathematicians and mathematics because the extension of the concept
of mathematics has, from time to time, been disputed. There was disagreement
about whether Newtonian fluxions (calculus), Cantor’s ‘paradise’ of the
mathematics of infinities and the computer based solution to the four colour problem
counted as properly mathematical. This suggests that mathematics – and hence knowledge
of mathematics – is sometimes, at least, fixed by the view taken by mathematicians
rather than the other way round. But it is the other side of the contrast that matters
here: disciplines whose knowledge is identified by whatever the discipline, itself
picked out in some other way, requires and where there is no presupposition that
what needs to be known is intrinsically unified.
On this other side of the distinction, there might be roles such as
restaurant proprietorship for which what is known, or needs to be known, is not
intrinsically unified. The role gathers together diverse areas of subsidiary knowledge
as the knowledge proper to restaurant proprietorship. This might include some of
what is involved in cookery, customer relations, tax law etc. To identify restaurant-proprietorship-knowledge,
one needs to identity first the role and only then whatever is the knowledge that
turns out to be necessary to carry it out successfully. Further, the knowledge so
needed is not particular to this role. It involves the right mix of what is known
in other roles by chefs, social psychologists and moral agents, and tax lawyers.
Given this contrast in principle in the order of determination of
professional role and underpinning knowledge on which side does nursing lie? I have
argued in this chapter that the knowledge nurses need to have lies on both sides
of a range of significant distinctions: knowledge necessary for explanation but
also for understanding; of facts but also values; and both explicit and tacit. This
suggests that ‘nursing knowledge’ is not intrinsically unified but instead comprises
different elements necessary for the practice of nursing.
Does this mean that there is no such thing as ‘nursing knowledge’?
In a related context, the epistemologist Michael Williams suggests an analogy with
Francis Bacon’s (1561–1626) discussion
of the nature of heat.
Think of Bacon’s notorious natural history of heat, which brings
together various things we call ‘hot’, including bodies warmed by the sun’s rays,
substances undergoing exothermic reactions, and ‘hot’ oils and spices that ‘burn’
the tongue. Is there a single thing here, heat? There is no reason, in advance of
theory, for supposing that there is. [Wiliams 1988: 424]
Bacon’s method is to survey all the things we call ‘hot’. Now in one
sense, this is, indeed, an account of heat, all the things which have heat. But
as the list implies, the sense of ‘hot’ or ‘heat’ involved varies across the cases.
There is no underlying unity to them. (To achieve a unity, to advance a science
of heat, would involved rejecting some of Bacon’s examples, such as ‘hot’ spices,
as not instances of the revised unified concept.)
To reject the idea that there is a unified underlying concept of nursing
knowledge is not to reject the idea that the different aspects highlighted in this
chapter are instances of knowledge. They are but they are gathered together in virtue
of a prior understanding of the nature and role of the profession of nursing: perhaps
centrally what is needed for caring for patients and health service users. Nursing
knowledge is whatever knowledge is needed properly to realise that aim or role.
If this is the case it suggests a related task for the nurses as
experts in diverse forms of knowledge. In the presence of a particular patient
of mental health service user, they have to select the knowledge appropriate to
‘each patient’s unique health state and diagnosis, their individual risks and benefits
of potential interventions, and their personal values and expectations’ in
Sackett et al’s phrase. This task fits a distinction between determinate and reflective
judgement suggested by Kant in his Critique
of Judgement [Kant 1987].
If the universal (the rule, principle, law) is given, then
judgment, which subsumes the particular under it, is determinate... But if only
the particular is given and judgment has to find the universal for it, then
this power is merely reflective. [Kant 1987: 18]
The model at work here is of judgement as having two elements: a
general concept and a particular subject. Judgement subsumes a particular under
a general concept. The contrast between determinate and reflective judgement is
then between an essentially general judgement, when the concept is already
given, and a particular or singular judgement, which starts only with a
particular. The former, determinate judgement, appears to be relatively mechanical
and thus unproblematic. The idea that if a general principle is already given
then judgements which deploy it are relatively unproblematic can be illustrated
through the related case of logical deduction where a general principle is
already given. If, for example, one believes that
1: All men are mortal; and
2: Socrates is a man.
Then it is rational to infer that:
3: Socrates is mortal.
One reason this can seem unproblematic is the following thought.
If one has accepted premises 1 and 2 then one has, ipso facto, already accepted premiss 3. To accept that all men are
mortal is to accept that Tom, Dick, Harry and
Socrates are mortal. So given 1 and 2, then 3 is no step at all [though see
Carroll 1895]. By contrast, for reflective judgement, there is a principled
problem in how to get from the level of individuals to the level of
generalities, or how to get from people and things to the general concepts that
apply to them. That is not a matter of deduction because the choice of a general
concept is precisely what is in question. To move from the particular to the
general that applies to it is somehow to gain information not to deploy it.
Reflective judgement thus cannot be a matter of mechanical derivation.
Kant suggests that the reflective judgement is an essentially
imaginative ability and he connects it to aesthetic judgements or judgements of
art. The key element of aesthetic judgment, he suggests, is the ‘ability to
judge an object in reference to the free
lawfulness of the imagination’ in which there is ‘a subjective harmony of
the imagination with the understanding without an objective harmony’ [ibid:
91-92]. It is the harmony of the faculties of imagination and understanding in
judgment which is both the source of pleasure that grounds aesthetic judgment.
This connection between reflective judgement and art suggests a final
characterisation of nursing.
Whilst there is no such thing as nursing knowledge, understood as
a unified kind, that very fact puts a key selective skill at the heart of
nursing, a key piece of know-how or tacit knowledge. Good patient-focused nursing
requires the exercise of judgement which seeks, rather than presupposes, appropriate
general knowledge. It is thus what Kant would call a reflective rather than determinate
judgement. And thus, still following Kant, it is an art not a science. So the knowledge
at the heart of nursing, the knowledge to select the right subsidiary knowledge
called for by particular patients in particular situations, is an art not a science.
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