MEASURE: Matrix reasoning subscale of the WASI

The Matrix Reasoning subtest of the WASI was used to produce an estimate of nonverbal intellectual ability, which serves as a proxy for IQ in our analyses. Given the variability in language across the research sites, we use only the Matrix Reasoning subscale.

Wechsler, D. (1999). Wechsler Abbreviated Scale of Intelligence. The Psychological Corporation: Harcourt Brace & Company. New York, NY.