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PSYCH352 Lecture Notes - Discriminant, Schizophrenia, Acculturation

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Igor Grossmann

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Winnie Chan
February 1st, 2013
Poreh, A.M. (2000). The quantified process approach: an emerging methodology to
neuropsychological assessment. The Clinical Neuropsychologist, 14:2, 212-222.
doi: 10.1076/1385-4046(200005)14:2;1-Z;FT212
The Quantified Process Approach: An Emerging Methodology to
Neuropsychological Assessment Amir M. Poreh (2000)
History and Background of the Quantified Process Approach
- In the past, clinicians in the field of neuropsychology have favored the used of standardized
achievement-oriented testing procedures
o Others have argued that such an approach does not accurately reflect the problem-
solving deficits of brain-injured patients
- A contrasting process approach emerged to address these problems this approach is
known as the Quantified Process Approach and it relies greatly on the use of case studies,
non-standardized measures, and qualitative observation of patients’ performance
- Until the early 1970s, this process approach was most commonly used in Europe; however,
this approach also gained supported in the United States, but with some major alterations:
o First, the American researchers attempted to adapt this approach to traditional
standardized neuropsychological assessment
o Second, they attempted to operationally define the methods by which behaviour was
- Much of the influential work in the American process approach was conducted in Boston
hence, termed Boston Process Approach (a.k.a. Quantified Process Approach)
- There were some problems with the Quantified Process Approach noted by Erickson (1995)
o Many of the insights and assertions that have been presented by proponents of the
approach were based solely on case studies
o There was hypocrisy in the effects of situational variables
o Many observations regarding common clinical tests were not subjected to empirical
o Concluded that more work is needed to provide support many of the clinical
assertions of the process approach
- Proponents of the Quantified Process Approach started to develop new psychometrically
sound measures based on advancements in cognitive information processing models these
new measures may be classified under the analytical approach to neuropsychological
Some Differences Between the Quantified Process Approach and Other Approaches
- The Quantified Process Approach differs from the fixed and flexible battery approach in that
standardized and experimental tests are:
o Not scored in the standardized binary fashion (right or wrong)
o In many cases, not administered in the standardized manner
- The Quantified Process Approach differs from the clinical investigative approach in that:
o Qualitative aspects of behaviour are quantified and subjected to statistical analyses
rather than simply described
o Testing of clinical limits is operationally defined, repeatable, and quantifiable, as
opposed to particularized for a given patient
The Quantified Process Approach
1) The “Satellite” Testing Paradigm
- An approach by which new tasks are developed to complement existing tests so as to clarify
a given test performance
- “Satellite” tests include:
o Digit-Symbol Recognition added portion used to assess whether poor
performance is due to failure to learn or failure to remember the digit-symbol
o Digit-Symbol Coding added portion in which poor performance on this task
reveals graphomotor deficits
o Trial Making Test (TMT) Oral Version may be useful in controlling for motoric
and/or visual-spatial impairments, allowing for clarifications of errors on the original
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