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Handout - The Quantified Process Approach - An Emerging Methodology to Neuropsychological Assessment.docx

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Igor Grossmann

WinnistChan February 1 , 2013 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 assessed - 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 inquiry 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 assessment 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 combinations 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 test Reference: 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 WinnistChan February
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