Validity of the executive function performance test in individuals with schizophrenia

Noomi Katz*, Inbal Tadmor, Batya Felzen, Adina Hartman-Maeir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


The purpose of this study was to examine the reliability and validity of the Executive Function Performance Test (EFPT) in a schizophrenic population. Participants were 30 individuals with the acute phase of schizophrenia and 31 with the chronic stage. Internal consistency using Cronbach's alpha was high (α = .88). Two-way multiple analysis of covariance revealed that the acute group scored significantly higher than the chronic group on almost all tasks and components of the EFPT (p = .045 to .000), supporting construct validity. Moderate to high Spearman correlation coefficients were found between the total EFPT score and the total Behavioral Assessment of the Dysexecutive Syndrome profile and standardized scores within each of the groups (r =.433 to .764; p < .027 to .000), supporting criterion validity. The findings support the use of the EFPT for identifying executive functions in the context of everyday life and instrumental activities of daily living tasks. However, further studies are needed in different populations and cultures.

Original languageAmerican English
Pages (from-to)44-51
Number of pages8
JournalOTJR Occupation, Participation and Health
Issue number2
StatePublished - 2007


  • Dysexecutive syndrome
  • Executive function
  • Functional assessment


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