The present investigation outlined the development of the parent-reported ADHD symptom infrequency scale (PRASIS), a stand-alone questionnaire aimed to discriminate between parents exaggerating ratings of ADHD symptoms of their child from parents more accurately reporting symptoms. The PRASIS includes an Infrequency scale (INF) to measure infrequently reported symptoms of ADHD and a clinical scale to measure DSM-5 defined ADHD symptoms (ADHD Total). An initial list of infrequency and clinical items was revised over the course of three studies. Analyses on the final version of the measure demonstrated good to excellent internal consistency (INF α = .87, ADHD Total α = .94) and high convergent validity of the PRASIS ADHD Total scores with ADHD-Rating scale V Total scores (r = .87, p < .001). Omnibus ANOVA comparisons demonstrated excellent group discrimination of both the PRASIS Infrequency scale and the PRASIS ADHD scale (Cohen’s f = 0.81-0.90). The final version of the measure showed specificity (.88) above the minimum requirement set a priori (>.80) and resulting sensitivity (.74) similar or higher than other measures in the symptom validity literature. Specificity and sensitivity are reported for multiple cut-off scores, and positive predictive values and negative predictive values are presented for several base rates.
|First Author||Sofia Lesica|
|Second Author||Reid Skeel|
|Third Author||Brittany Elizabeth Fust|