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Discrete vs. continuous processing: the fate of an incompletely processed perceptual dimension
1Department of Psychology, Free University, Amsterdam, The Netherlands.
Acta Psychologica
|November 1, 1995
Summary
Information processing is discrete, not continuous. Irrelevant, but slower, information does not impact responses, even when retrieved later. This supports discrete processing models.
Area of Science:
- Cognitive psychology
- Human information processing
Background:
- The debate on continuous versus discrete information processing questions whether incomplete data impacts subsequent actions.
- Understanding this is crucial for cognitive models.
Purpose of the Study:
- To investigate if incompletely processed information affects reaction times.
- To differentiate between continuous and discrete information processing models.
Main Methods:
- Two stimuli (SL, SR) were presented sequentially, with fixation (TL), saccade (TM), and response (TR) times measured.
- Subjects encoded two dimensions (size, shape), with varying relevance and processing speed.
- Experiment repeated with practiced subjects to analyze TR as a function of TL.
Main Results:
- Fixation time (TL) was shorter when encoding the relevant dimension was faster.
- When both dimensions were relevant, TL was similar to when only the slow dimension was relevant, suggesting parallel processing.
- Response time (TR) showed that a different, slow, irrelevant dimension did not affect the same/different response, supporting the discrete model.
Conclusions:
- Findings align with the discrete information processing model.
- Irrelevant, but slower, information does not interfere with responses, even if retrievable.
- Suggests a retrieval code exists independently of response interference.
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