Event-Related Potential as a Measure of the Effects of Report Order on Multidimensional Stimulus Identification
| Autor: | I-hsuan Shen, 沈宜璇 |
|---|---|
| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 The problems in designing displays have been among the most important topics in human factors engineering. Compacting information into a single multidimensional stimulus can be an effective way of utilizing limited display space and reducing clutter. In a multidimensional display, the order of reporting dimensional values may play an important role in the accuracy and speed of identifying targets. However, all reaction time investigations must make inferences about the processes between stimulus and response by looking at the final product of the response. To augment this behavioral measurement, the event-related brain potential (ERP) has been used to provide a direct estimate of the timing of cognitive processes. Two experiments were conducted in the study. Experiment 1 used ERP to investigate the effects of report order on multidimensional stimuli identification. Experiment 2 used task switch paradigm to investigate ERP and performance when order of reporting stimulus dimensions was a within-subject factor. In Experiment 1, subjects tended to respond faster if a relative high S-R compatible, natural language-appropriate order of reporting the dimensional attributes was employed. For ERP measurement, the results showed greater N2 and N400 neural activities for less appropriate report order. Subjects seemed to put more mental effort and showed more inhibition in less appropriate report order. Practice reduced response times with smaller improvements as the number of practice increased. The effect of training was mainly in the early stage of ERP components, i.e., N1 and P2 of cognitive processing. The mean amplitude of N1 and P2 increased instead of decreased with practice. It seemed that ERPs of participants didn’t habituate during the training sessions. In Experiment 2, the order of report was a within-subject factor. Because of response competition, response times were slower. And switch cost increased significantly greater for a less appropriate report order. For ERPs measurement, the results showed greater N400 neural activities for less appropriate report order. It seems that participants showed better performance in behavior data, better neural correlates in ERPs, and less switch cost when they responded in a more appropriate and high stimulus-response compatible report order. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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