Is Cognitive Neuropsychology Possible?

Cognitive neuropsychology's domain of inquiry concerns the structure of normal perceptual, motor, and cognitive processes. As such, it constitutes a branch of cognitive science. Cognitive neuropsychology differs from other branches of cognitive science only by the type of observation that it uses in developing and evaluating theories of normal cognition. The data used in cognitive neuropsychology are the patterns of performance produced by brain-damged subjects. Because the basic data used in cognitive neuropsychology are the result of a biological manipulationa brain lesionthese data will be relevant to claims about the functional organization of the brain. Hence, cognitive neuropsychology may also be considered to be a branch of cognitive neuroscience. However, in this paper I will be concerned with an assessment of research programs whose principal or only aim is to constrain theories of normal cognitive functioning through the analysis of acquired disorders of cognition. Following a brief discussion of the basic assumptions that motivate cognitive neuropsychological research, I consider Kosslyn and Van Kleeks (1990) claim that the study of brain-damaged subjects for the purpose of constraining theories of normal cognitive processing cannot lead to meaningful conclusions unless the theories are directly cast in terms of anatomical and physiological facts. I argue that these authors conflated criticisms that may apply to any empirical science with criticisms that may apply specifically to cognitive neuropsychology. Separate consideration of the criticisms specific to cognitive neuropsychology reveals that these are unfounded. The main point of this discussion is to emphasize the pragmatic character of the motivation for using impaired performance to constrain theories of normal cognition. The usefulness of cognitive neuropsychological research is illustrated through specific examples.

[1]  Alfonso Caramazza,et al.  Theory and methodology in cognitive neuropsychology: A response to our critics , 1988 .

[2]  Alfonso Caramazza,et al.  The poverty of methodology , 1991, Behavioral and Brain Sciences.

[3]  Alfonso Caramazza,et al.  Spatially Determined Deficits in Letter and Word Processing , 1991 .

[4]  H. Teuber.  Physiological psychology. , 1955, Annual review of psychology.

[5]  M. Coltheart.  Lexical access in simple reading tasks , 1978 .

[6]  Alfonso Caramazza,et al.  Aspects of the Spelling Process: Evidence from a Case of Acquired Dysgraphia , 1986 .

[7]  Broken brains and normal minds: why Humpty-Dumpty needs a skeleton , 1993 .

[8]  Tim Shallice,et al.  Case study approach in neuropsychological research , 1979 .

[9]  A. Caramazza.  Cognitive Neuropsychology and Neurolinguistics: Advances in Models of Cognitive Function and Impairment , 1990 .

[10]  E. Warrington,et al.  Transcoding Sound to Spelling: Single or Multiple Sound Unit Correspondence? , 1987, Cortex.

[11]  Giuseppe Vallar,et al.  The Anatomy of Spatial Neglect in Humans , 1987 .

[12]  Alfonso Caramazza,et al.  Spatial representation of words in the brain implied by studies of a unilateral neglect patient , 1990, Nature.

[13]  G. Underwood.  Strategies of information processing , 1980 .

[14]  M. Jane Riddoch,et al.  Neglect and the peripheral dyslexias , 1990 .

[15]  A. Caramazza,et al.  Where Do Semantic Errors Come From? , 1990, Cortex.

[16]  E. Renzi.  Disorders of space exploration and cognition , 1982 .

[17]  Alfonso Caramazza,et al.  The logic of neuropsychological research and the problem of patient classification in aphasia , 1984, Brain and Language.

[18]  A. Caramazza.  On drawing inferences about the structure of normal cognitive systems from the analysis of patterns of impaired performance: The case for single-patient studies , 1986, Brain and Cognition.

[19]  M S Gazzaniga,et al.  Right hemisphere language following brain bisection. A 20-year perspective. , 1983, American Psychologist.

[20]  A. Damasio,et al.  The neural basis of language. , 1984, Annual review of neuroscience.

[21]  A. Caramazza,et al.  On crude data and impoverished theory , 1991, Behavioral and Brain Sciences.

[22]  Eric L. Schwartz,et al.  Computational Neuroscience , 1993, Neuromethods.

[23]  M. Alexander,et al.  Principles of Neural Science , 1981 .

[24]  J. Marshall,et al.  Syntactic and semantic errors in paralexia , 1966 .

[25]  J Dérouesné,et al.  Lexical or orthographic agraphia. , 1981, Brain : a journal of neurology.

[26]  Stephen M. Kosslyn,et al.  Is Cognitive Neuropsychology Plausible? The Perils of Sitting on a One-Legged Stool , 1992, Journal of Cognitive Neuroscience.

[27]  David Caplan,et al.  Neurolinguistics and linguistic aphasiology: Contents , 1987 .

[28]  Alfonso Caramazza,et al.  Levels of representation, co-ordinate frames, and unilateral neglect , 1990 .

[29]  E. Warrington,et al.  Cognitive Neuropsychology: A Clinical Introduction , 1990 .

[30]  T Shallice,et al.  The selective impairment of auditory verbal short-term memory. , 1969, Brain : a journal of neurology.

[31]  A. Luria.  Higher Cortical Functions in Man , 1980, Springer US.

[32]  John R. Anderson.  Arguments concerning representations for mental imagery. , 1978 .

[33]  A. Caramazza,et al.  The structure of graphemic representations , 1990, Cognition.