On interpreting measures of change due to training or other interventions: A comment on Cascio (1989, 1991)

Abstract

Cascio (1991; see record 1989-98681-003 ) presented a method of converting a measure of change in performance due to a training intervention expressed in standard deviation units to a measure expressed in percentage change in performance. Cascio asserted a direct relationship between the two, based on properties of the normal curve; however, an additional parameter—the ratio of the standard deviation of performance to mean performance—is also needed to make this conversion. (PsycInfo Database Record (c) 2025 APA, all rights reserved)