Articlediamond2017

Complexity, Pseudoscience and Rorschach Performance Assessment System

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Psychological Testing and Assessment Psychometric Methodologies and Testing Academic and Historical Perspectives in Psychology

Abstract

Objective: Complexity is one of the most important components of the Rorschach Performance Assessment System, R-PAS (the equivalent of general intelligence for IQ test). However Complexity is problematic on conceptual grounds and the objective of this research is to assess the scientificity of this notion. Method: The Belgian adult non-patient reference sample of the RCS was used in this study. (A) Data were analyzed according to R-PAS procedures, (B) protocols were randomly rescored and analyses were repeated; (C) analyses were compared. Results: Complexity main results were replicated with both real and random protocols. In addition, the Complexity of real and random protocols are highly correlated (r=0.82). Conclusions: Complexity is a pseudoscientific notion and the use of the R-PAS in clinical practice is questionable. The nature of the problem of R is discussed, and means to address it are proposed.

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