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Effect of distance instructions on size judgments.
The American Journal of Psychology
|January 1, 1985
Summary
Cognitive information influences size perception, even with reduced visual cues. However, verbal distance instructions lead to overestimations, indicating size judgments are not always accurate.
Area of Science:
- Psychology
- Perception
- Cognitive Science
Background:
- Understanding how humans perceive object size is crucial in visual perception research.
- The influence of cognitive factors, such as distance information, on size judgments is a key area of investigation.
Purpose of the Study:
- To test if cognitive information about object distance aids size judgments in reduced-cue environments.
- To evaluate the impact of verbal distance instructions independently of other cues.
Main Methods:
- Developed an improved experimental paradigm to isolate the effects of distance instructions.
- Assessed the effectiveness of cue reduction in manipulating perceptual conditions.
- Analyzed size judgments under conditions with and without explicit distance information.
Main Results:
- Cue reduction was successful in altering perceptual conditions.
- In the absence of distance instructions, a specific distance tendency influenced size judgments.
- Verbal distance instructions precisely affected size judgments according to the size-distance invariance hypothesis, but with a constant overestimation error.
Conclusions:
- Cognitive information, like verbal distance instructions, significantly impacts size judgments.
- Despite precise effects, size judgments are not veridical due to cognitive biases, such as overestimating verbal distance cues.