The relationship of IQ to effort test performance

Clin Neuropsychol. 2008 Jul;22(4):705-22. doi: 10.1080/13854040701440493.

Abstract

The relationship between IQ and nine effort indicators was examined in a sample of 189 neuropsychology clinic outpatients who were not in litigation or attempting to obtain disability. Participants with the lowest IQ (50-59) failed approximately 60% of the effort tests, while patients with an IQ of 60 to 69 failed 44% of effort indicators, and individuals with borderline IQ (70 to 79) exhibited a 17% failure rate. All patients with IQ < 70 failed at least one effort test. Cutoffs for the Warrington Recognition Memory Test (Words) and Finger Tapping maintained the highest specificities in low IQ samples.

MeSH terms

  • Adult
  • Disability Evaluation
  • False Positive Reactions
  • Female
  • Humans
  • Intelligence / physiology*
  • Intelligence Tests / statistics & numerical data*
  • Male
  • Malingering / diagnosis*
  • Malingering / psychology
  • Memory Disorders / diagnosis
  • Memory Disorders / psychology*
  • Middle Aged
  • Neuropsychological Tests / statistics & numerical data
  • Outpatients