"This study introduces Rotter's expectancy construct as an important factor in delayed reinforcement situations. The hypotheses were: (a) other factors being equal, the preference strength for a delayed reward will be low, moderate, or high as the expectancy for the occurrence of the delayed rewards is respectively low, moderate, or high; (b) social agents (i.e., Es) will serve as cues for different levels of expectancy." These hypotheses were supported. 15 references. (PsycINFO Database Record (c) 2006 APA, all rights reserved)