Working Memory Dimensions as Differential Predictors of the Speed and Error Aspect of Multitasking Performance

Being able to work on several tasks at the same time (multitasking) is an important performance aspect of many jobs. Recent research findings pointed out the important role of working memory for multitasking performance in general. To understand more about the role of working memory in predicting the speed and the error aspect of multitasking performance, this research was based on a newly developed and well-elaborated multidimensional model of working memory (Oberauer, Süß, Wilhelm, & Wittmann, 2003). Its 3 dimensions are storage in the context of processing, coordination, and supervision. In addition, attention and reasoning were controlled when predicting multitasking speed and error. A multitasking scenario, a battery of working memory tests, a battery of reasoning tests, and 2 attention tests were administered to 135 participants. As expected working memory was the best predictor of multitasking performance, followed by reasoning and attention. Working memory components showed a differential validity when predicting multitasking speed and multitasking error: Multitasking speed was predicted mainly by coordination, and HUMAN PERFORMANCE, 19(3), 253–275 Copyright © 2006, Lawrence Erlbaum Associates, Inc.