As teacher professional development research includes more experimental designs, new challenges arise. We examine the threat of participant attrition as an example of the types of problems researchers face. Counter-intuitively, higher levels of recruitment effort were related to higher dropout rates among teachers. We also found that teachers left…

Arguing that reliable and valid dropout rate estimates are prerequisite to establishment of causal factors and intervention programs, this article examines differences in definitions of dropouts, computational methods, and the complexities in defining cohorts, as well as the importance of sample attrition. Several sources of error are discussed.…

Basic background information on college student attrition research studies is provided. This paper is divided into nine components that were prominent in the existing literature: (1) higher education and the concern for attrition; (2) factors involved in college student attrition; (3) demographic factors involved in college student attrition; (4)…

Presents a case study of 13 tribal college students who either completed or dropped out of their programs. Identifies societal, organizational, institutional, family, and individual factors associated with these students' completion, including: (1) lack of money; (2) inadequate preparation; (3) health problems; and (4) housing problems. Contains…