Evaluation is a transdiscipline with a focus upon asking and answering
important questions about programs, policies, and interventions. A unifi ed taxonomy
of evaluation-specific program outcomes would be a helpful tool to evaluators,
program designers, implementers, and policymakers, but one has not yet been
proposed and validated in an evaluation context.This study builds from a grounded
analysis of 125 programs and over 850 individual program outcomes, from which
was developed a taxonomy of nine outcomes specific to evaluating programs and
interventions: attitude, affect, behavior, cognition, status, relationship, biological,
environmental, and economic. The article defines key terms, directionality, and flexible
timeframes for measurement, and suggests specifi c fields that provide a helpful
lens for understanding programs and improving evaluation practice.