This report is one of five submitted as products of a "Study Designed to Assist Planning of Research on Significant Instructional Features in Bilingual Education Programs." The reports are intended to assist the National Institute of Education in its plans for a major new research study in bilingual education. The present report summarizes the results of 123 open interviews conducted with bilingual practitioners who are administrators in: Los Angeles, California; Miami, Florida; New York, New York; Oakland, California; and Rough Rock, Arizona. The questions asked were designed to elicit responses about the working definitions of terms and the designs considered. The intent was to test the credibility and acceptability to consumers of alternative study approaches. Among important concerns to emerge from the interviews are respect for administrative protocol of each educational organization, the need for a clear prospectus of the study, financial burden and disruption of educational process, clarification of benefits of the study, and the need to secure parental cooperation. (Author/JB)