Age and individual differences in visuospatial processing speed: Testing the magnification hypothesis

Forty young adults and 40 older adults performed seven visuospatial information processing tasks. Factor analyses of the response times (RTs) yielded a single principal component with a similar composition in both age samples. For both samples, regressing the mean RTs of fast and slow subgroups for the seven tasks (18 conditions) on the corresponding mean RTs for their age group accounted for 99% of the variance. Taken together, these findings suggest that individual differences in processing time were largely task independent. The magnification hypothesis, a simple mathematical model of the interaction between age and ability, is presented. This model correctly predicts the finding that in both the young and the older adult groups, individual differences increased systematically with task difficulty. The magnification hypothesis also explains the regression parameters describing individual differences among young adults and predicts correctly that equivalent parameters describe individual differences among older adults. According to the magnification hypothesis, the RTs of slower individuals are more affected by aging than those of faster individuals, and slower individuals may be more at risk with respect to other biological insults (e.g., changes in health status) as well.     

The Influence of Efficacy Beliefs on Teacher Performance and Student Success: Implications for Student Support Services

The influence of teachers’ efficacy beliefs on student achievement is well documented in educational literature. Efficacy beliefs are derived from sources of information teachers obtain from professional experiences. This article provides student support services personnel with an overview of efficacy beliefs and their impact on teachers’ thoughts, emotions, and behaviors. A cognitive behavioral framework, rational emotive behavior therapy, is used to conceptualize ways efficacy beliefs may hinder teacher performance and student success. Implications for student support services and research are provided.