Practice Effects and Test-Retest Reliability of the Continuous Performance Test, Identical Pairs Version in Patients with Schizophrenia over Four Serial Assessments

Kuan Wei Chen, Gong Hong Lin, Nan Cheng Chen, Ji Kuan Wang, Ching Lin Hsieh

Research output: Contribution to journalArticle

Abstract

OBJECTIVE: The purposes of this study were to examine the practice effects and test-retest reliability of the Continuous Performance Test, Identical Pairs version (CPT-IP) over four serial assessments in patients with schizophrenia. METHOD: Fifty-six patients with schizophrenia were assessed with the CPT-IP four times, once per week. The CPT-IP contains four indices: "2-digit score," "3-digit score," "4-digit score," and "total score." RESULTS: The four indices showed trivial-to-small practice effects (Cohen's d = -0.13-0.24), good-to-excellent test-retest reliability (ICC = 0.62-0.88), and unacceptable random measurement error (MDC% = 33.8%-110.8%). CONCLUSIONS: The total score had the best reliability among the four indices. Although practice effects of the four indices all appeared cumulative, all four CPT-IP indices reached a plateau after the second assessment. These results indicate that clinicians should interpret the change scores of the CPT-IP conservatively and use the total-score index in their routine repeated assessments.

Original languageEnglish
Pages (from-to)545-552
Number of pages8
JournalArchives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists
Volume35
Issue number5
DOIs
Publication statusPublished - Jul 24 2020
Externally publishedYes

Keywords

  • Continuous Performance Test
  • Identical Pairs version
  • Practice effects
  • Schizophrenia
  • Sustained attention
  • Test–retest reliability

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Clinical Psychology
  • Psychiatry and Mental health

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