As part of ACT's Holistic Framework, ACT researchers developed a Behavioral Skills Framework that can be used to assess behavior in education and work settings. By utilizing specific statements of effective behaviors, known as performance level descriptors (PLDs) (e.g., communicating well in group tasks), the Behavioral Skills Framework is designed to predict successful outcomes, identify potential risks, and propose actionable resolutions by assessing non-cognitive factors (i.e., factors not related to one's intellectual capacity). The present document contains the following: (1) A brief overview of the theory and scientific evidence for the Behavioral Skills Framework, (2) A comprehensive description of the methods used to develop the PLDs; and (3) A description of the anticipated uses of PLDs in assessment.