Sharp limitations on measuring the impact of Volunteers in Service to America (VISTA) can be largely overcome by developing an improved system and techniques for planning projects and their likely effects. The distinguishing characteristics of VISTA for measurement purposes are: a large number of volunteer program activities and sponsors, hence great diversity of outcomes; imprecise goals; and a VISTA presence that reinforces program activities but also has independent consequences. Maximum feasibility of measuring VISTA impact (and maximum benefit to program effectiveness from doing so) depend upon viewing measurement as part of a process that includes: analyzing communities to identify key points for VISTA impact; planning projects designed to achieve specific attitude and behavioral change; training volunteers to work toward these objectives; and measuring and evaluating effectiveness according to designated behavioral indicators related to the specified goals. A specific project embodying these elements is described and recommended in the report. (There is a mistake in numbering pages in document but nothing is missing.) (EB)