title: The relationship of IQ to effort test performance.
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.
authors.affiliation: Harbor-UCLA Medical Center, Torrance, CA, USA. andydean1@msn.com
authors.forename: Andy C
authors.initials: AC
authors.lastname: Dean
authors.forename: Tara L
authors.initials: TL
authors.lastname: Victor
authors.forename: Kyle B
authors.initials: KB
authors.lastname: Boone
authors.forename: Ginger
authors.initials: G
authors.lastname: Arnold
mesh_terms: D000328:Adult; D004185:Disability Evaluation; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007360:Intelligence / Q000502:physiology*; D007361:Intelligence Tests / Q000706:statistics & numerical data*; D008297:Male; D008306:Malingering / Q000175:diagnosis* / Q000523:psychology; D008569:Memory Disorders / Q000175:diagnosis / Q000523:psychology*; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000706:statistics & numerical data; D010045:Outpatients