Argues that dual-task performance is currently not interpretable because several compatible hypotheses have been offered to account for dual-task interference. Demonstrates inability to discriminate among alternative hypotheses by constructing a model which includes limited resources and response competition and requires running at least eight…

This study examined effects of individual differences in speak-span scores and variations in memory demands on class-inclusion performance of 10-, 13-, and 15-year-olds. Results from regression analyses and the mathematical model indicated that differences in age, speak span, and memory load affected performance. Effects of speak span and memory…

Three experiments examined kindergartners' and second graders' retention in the context of two distinctiveness manipulations, the von Restorff and bizarre imagery paradigms. Results showed that: older children retained more information from lists of pictures or interactive images over 3 weeks than younger; younger children failed to benefit from…