MAQ Differences on APA and TLE Scores between Impaired and Intact Cognitive Abilities
| Clinical Variable | MAQ (n for Impaired, Likely Intact) | Impaireda | Likely Intactb | F | P | d |
|---|---|---|---|---|---|---|
| Full-scale IQ | APA (67, 330) | 4.55 (1.35) | 5.13 (0.88) | 19.45 | < .001 | .59 |
| TLE (68, 335) | 4.29 (1.73) | 5.23 (1.06) | 34.92 | < .001 | .79 | |
| Verbal Comprehension Index | APA (97, 269) | 4.76 (1.27) | 5.14 (0.87) | 10.43 | .001 | .38 |
| TLE (94, 273) | 4.52 (1.66) | 5.30 (0.97) | 30.59 | < .001 | .66 | |
| Reading grade | APA (144, 197) | 4.91 (1.19) | 5.07 (0.86) | 2.86 | .06 | .19 |
| TLE (144, 197) | 4.56 (1.60) | 5.28 (1.05) | 15.13 | < .001 | .43 | |
| Listening grade | APA (137, 198) | 4.84 (1.16) | 5.06 (0.96) | 6.37 | .002 | .28 |
| TLE (136, 197) | 4.42 (1.58) | 5.30 (1.00) | 23.48 | < .001 | .54 |
Differences for the impaired and likely intact groups are presented as mean (SD). For intelligence, full-scale IQ score of 85 was used with a 95% CI (± 5 points): < 80 were categorized as impaired and ≥ 90 as intact. The same criterion was employed with the Verbal Comprehension Index. Given the low grade level for the MAQ, tertiles (highest and lowest thirds) were used. To facilitate interpretation, statistically significant differences and medium effect sizes are in bold.
↵a Means for impaired cognitive abilities were 71.86 (full-scale IQ), 71.24 (Verbal Comprehension Index), 2.11 (reading grade), and 2.03 (listening grade).
↵b Means for intact cognitive abilities were 100.74 (full-scale IQ), 99.80 (Verbal Comprehension Index), 10.97 (reading grade), and 10.70 (listening grade).
APA, adversarial perspective on arrest; MAQ, Miranda Acquiescence Questionnaire; TLE, trusting law enforcement.