Scientific Validity


PAIRIN’s Behavioral Testing is based on Dr. Harrison Gough’s Adjective Check List (ACL). The ACL is a norm-referenced standardized test consisting of 300 adjectives and adjectival phrases commonly used to describe a person’s behavioral attributes. The ACL is unique in that the required number of items checked is unspecified so adjectives selected are ones that are salient for the person being evaluated. It may be administered for a multiplicity of purposes including, but not limited to, eliciting a self-evaluation from an individual.

This document provides research results and data related to the reliability and validity of the ACL. Drawn from a sample size of 9,382 individuals and normalized over fifteen years, the information in this document includes reliability and validity data based on the current normative sample, an explanation of the points of application, and a summary of findings related to EEOC compliance.

To request a copy of the ACL Technical Manual, or to offer suggestions regarding the ACL or about this or any other related publications, please contact PAIRIN at

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