Reports 3 experiments based on the findings of B. Weiner and A. Kukla (see record 1970-12575-001) that perceived effort expenditure and ability level in addition to achievement outcome, are determinants of reward and punishment in achievement-related contexts. In Exp I 32 male and female undergraduates served as Ss in a simulated teaching experiment. Results demonstrate that the trait of diligence, as well as high effort expended on a particular task, enhances rewards from others. In Exp II, with 81 Swiss school teachers, perceived task difficulty was manipulated by varying task instructions. It was found that the perceived difficulty of a test does not influence the rewards and punishments dispensed as a function of perceived effort expenditure and level of ability. In Exp III 216 undergraduates made judgments about hypothetical students in all experimental conditions. It was suggested that prior findings indicating that low ability is relatively rewarded may be mediated, in part, by inferences of compensatory effort. (PsycINFO Database Record (c) 2016 APA, all rights reserved)