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Processing of indexical information requires time: Evidence from change deafness
Michael S Vitevitch1, Alexander Donoso
1Department of Psychology, University of Kansas, Lawrence, KS , USA. mvitevit@ku.ed
Quarterly Journal of Experimental Psychology (2006)
|June 17, 2011
Summary
Change detection reveals how the brain processes spoken words. Indexical information, like voice characteristics, is processed more slowly than linguistic content, impacting cognitive resource allocation.
Area of Science:
- Cognitive Psychology
- Psycholinguistics
- Auditory Perception
Background:
- Change detection studies enhance understanding of attention, perception, and memory.
- The change detection phenomenon offers a novel method to explore cognitive processes.
Purpose of the Study:
- To investigate the processing of linguistic versus indexical information in spoken words using change detection.
- To test hypotheses regarding cognitive resource allocation and processing speed for indexical information.
Main Methods:
- Two experiments employed a lexical decision task combined with voice change detection.
- Participants evaluated spoken stimuli, including nonwords of varying word-likeness, to manipulate cognitive load.
- Voice identity change detection and confidence ratings were recorded.
Main Results:
- Participants required more cognitive resources/processing time for word-like nonwords.
- Increased cognitive load correlated with higher accuracy in detecting voice changes (Experiment 1).
- Participants were more confident in voice consistency when processing word-like nonwords (Experiment 2).
Conclusions:
- Indexical information processing in spoken words occurs more slowly than linguistic information processing.
- Change detection is a valuable paradigm for investigating the temporal dynamics of cognitive information processing.
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