ERIC Number: EJ233296
Record Type: Journal
Publication Date: 1980-Jun
Reference Count: N/A
Planning Longitudinal Field Studies: Considerations in Determining Sample Size.
St.Pierre, Robert G.
Evaluation Review, v4 n3 p405-15 Jun 1980
Factors that influence the sample size necessary for longitudinal evaluations include the nature of the evaluation questions, nature of available comparison groups, consistency of the treatment in different sites, effect size, attrition rate, significance level for statistical tests, and statistical power. (Author/GDC)
Publication Type: Journal Articles; Reports - General
Education Level: N/A
Authoring Institution: N/A