Evaluating the prevalence and impact of examiner errors on the Wechsler scales of intelligence: A meta-analysis.

摘要: The purpose of the present investigation was to conduct a meta-analysis literature on examiner errors for Wechsler scales intelligence. Results indicate that mean 99.7% protocols contained at least 1 error when studies included failure record examinee responses as an were combined and 41.2% ignored omission combined. Furthermore, graduate student examiners significantly more likely make intelligence test than psychologists. However, psychologists made per protocol regardless inclusion or exclusion errors. On average, 73.1% Full-Scale IQ (FSIQ) scores changed result errors, whereas 15.8%-77.3% Verbal Comprehension Index (VCI), Perceptual Reasoning (PRI), Working Memory (WMI), Processing Speed In addition, results suggest tend overestimate FSIQ underestimate VCI scores. no strong pattern emerged PRI WMI. It can be concluded occur frequently impact index Consequently, current estimates standard measurement popular tests may not adequately capture variance due examiner.