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Der Einfluss von Strategien auf die Auswahl und Verarbeitung von Informationen bei Einfach- und Doppelaufgaben

Der Einfluss von Strategien auf die Auswahl und Verarbeitung von Informationen bei Einfach- und Doppelaufgaben

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LEHLE, Carola, 2007. Der Einfluss von Strategien auf die Auswahl und Verarbeitung von Informationen bei Einfach- und Doppelaufgaben [Dissertation]. Konstanz: University of Konstanz

@phdthesis{Lehle2007Einfl-10535, title={Der Einfluss von Strategien auf die Auswahl und Verarbeitung von Informationen bei Einfach- und Doppelaufgaben}, year={2007}, author={Lehle, Carola}, address={Konstanz}, school={Universität Konstanz} }

2011-03-25T09:19:00Z 2007 deu Der Einfluss von Strategien auf die Auswahl und Verarbeitung von Informationen bei Einfach- und Doppelaufgaben Lehle, Carola The influence of strategies on the selection and processing of information in single and dual tasks application/pdf deposit-license In the human information processing system, identification of stimuli and particularly response selection constitute processes with restricted capacity. Therefore, these processes can run simultaneously for several stimuli, respectively, tasks only in a limited way. However, by a strategic variation of visuo-spatial attention, two tasks can be processed either in a (more) serial or in a (more) parallel mode. Serial processing, where the processes with limited capacity are accessed only by one task at a time, is believed to be an optimal strategy to minimize the interference between the tasks and thus to improve performance (Logan & Gordon, 2001; Meyer & Kieras, 1997b). Parallel processing of several stimuli can also lead to benefits in performance under certain conditions. Up to now, this has only been demonstrated for single tasks (z.B. Gratton et al., 1992). To expand, respectively, deepen the state of knowledge about this issue, two studies were conducted in the present work. There, the preconditions, consequences and limitations of a strategic modulation between serial, respectively, focused and parallel processing in single and dual tasks were investigated. In the first study, it was examined whether momentarily irrelevant stimuli are processed more in parallel with a target, if they are relevant after responding to the target as stimuli for a secondary task (dual tasks), as compared to a situation where this is not the case (single task). The results clearly indicated a strong tendency to work in parallel in dual tasks with task repetition and in a focused mode in single tasks. However, with particular changes in the task structure, respectively, in the context, participants also adopted a serial strategy in dual tasks and a parallel strategy in single tasks. This led to the question whether the degree of parallel processing can also be varied if the essential features of the task remain fixed. In order to investigate this, the second study was conducted. There, participants proved to be able to directly realize serial and parallel processing strategies in dual tasks according to explicit instructions within certain boundaries. The degree of strategic parallel processing thus appeared to be consciously accessible and cognitively modifiable. Moreover, it became evident that increased parallel processing in dual tasks does not lead to an obvious benefit in performance. Parallel processing, however, might minimize the effort of cognitive control. Altogether, the results of the present work support theoretical models that allow parallel processing also on the stage of response selection in dual tasks and that, moreover, concede strategies a major role in task processing. Lehle, Carola 2011-03-25T09:19:00Z

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

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