This document contains four papers from a symposium on evaluation in human resource development (HRD). The first paper, "HRD Evaluation as the Catalyst for Organizational Learning" (Hallie Preskill), argues that HRD practitioners must stop considering evaluation a periodic event focused on a narrow set of variables and begin viewing it as an ongoing process of evaluative inquiry. "A Qualitative and Quantitative Approach to Evaluating Leadership Training" (Lilanthi Ravishankar, Zenger Miller) reports on a research project that evaluated a modular leadership program as part of a beta testing process, tested a blended qualitative and quantitative approach to data analysis, and demonstrated the blended approach's utility in evaluating HRD activities. "Development and Evaluation of the Critical Outcome Technique (COT)" (Richard A. Swanson, Brent W. Mattson) describes the COT, which is metaphorically similar to the critical incident technique but functions within the milieu of an ongoing organization and yields verifiable and quantifiable data on critical outcomes. "Monitoring the Effectiveness of a Performance-Focused Human Resource Development Workshop at Andersen Consulting Three Months after the Workshop" (Joel R. Montgomery) reports on a study that measured the effectiveness of an integrative learning workshop presented to 506 North American HRD professionals. (MN)