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PEAK Pre-Assessments: Preliminary Evidence Establishing Internal Consistency and Construct Validity
1Department of Psychiatry, Washington University in St. Louis, 4444 Forest Park Ave. Suite 2600, St. Louis, MO 63110 USA.
Abstract:
Promoting the Emergence of Advanced Knowledge (PEAK) is a behavior-analytic tool that assesses and teaches language and cognitive abilities. PEAK preassessment total scores showed statistically significant correlations with measures of intelligence (r = .703, p = .023) and adaptive behavior (r = .618, p = .018), whereas no significant correlations were found between PEAK and age, autism diagnostic instruments, or aggression scales in a sample (N = 18) receiving behavior-analytic assessment in an autism clinic. Statistically significant correlations were found between all modules within the PEAK system (p ≤ .001). Results provide preliminary evidence of the construct validity and internal consistency of the PEAK preassessments.
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