https://www.selleckchem.com/pr....oducts/as1842856.htm
Suggestions for determining the frequency of conducting preference and reinforcer assessments are discussed.Having one's funding cut in the course of conducting a longitudinal study has become an increasingly real challenge faced by developmental researchers. The main purpose of the current work is to propose "post hoc" planned missing (PHPM) data designs as a promising solution in such difficult situations. This study discusses general guidelines that can be followed to search for viable PHPM designs within a given budget restriction