Investigating Science Education Effect Sizes: Implications for Power Analyses and Programmatic Decisions

• Main Authors: Joseph A. Taylor (Author), Susan M. Kowalski (Author), Joshua R. Polanin (Author), Karen Askinas (Author), Molly A. M. Stuhlsatz (Author), Christopher D. Wilson (Author), Elizabeth Tipton (Author), Sandra Jo Wilson (Author)
• Format: Book
• Published: SAGE Publishing, 2018-08-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

A priori power analyses allow researchers to estimate the number of participants needed to detect the effects of an intervention. However, power analyses are only as valid as the parameter estimates used. One such parameter, the expected effect size, can vary greatly depending on several study chara...