Tested the hypothesis that increasing library services would increase returns of a questionnaire generated by that library. Students and faculty were surveyed before and after new services were offered at Wharton School. Results suggest source of sponsorship should be related to user group to be surveyed to maximize return rate. (CDD)

From a priori and post hoc data collection perspectives, this paper describes the interrelations among (1) power, alpha, effect size, and sample size for hypothesis testing; and (2) precision, confidence, and sample size for interval estimation. Implications for special education researchers working with convenient samples of fixed size are…

This booklet provides some systematic guidelines for assisting educational planners to discriminate between high-quality educational research and research that should not be relied on for decision making. The guidelines focus on educational research studies that employ either experimental or survey-research methodologies. A checklist is presented…