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Comparison of three psychophysical techniques for estimating body-size perception
R M Gardner1, L C Jones, E D Bokenkamp
1Department of Psychology, University of Colorado at Denver 80217, USA.
Perceptual and Motor Skills
|June 1, 1995
Summary
University students showed sensitivity to body size distortions. Adaptive probit estimation reliably indicated perceived body size and response biases in judgments.
Area of Science:
- Psychology
- Perception Science
- Human Factors
Background:
- Accurate body size perception is crucial for health and well-being.
- Previous research has explored various methods for assessing body size estimation.
Purpose of the Study:
- To evaluate the reliability of adaptive probit estimation for measuring perceived body size.
- To assess sensitivity and response bias in body size judgments using multiple methods.
Main Methods:
- Sixty-three university students estimated their body size using three methods: method of adjustment, adaptive probit estimation, and signal-detection analysis.
- Signal-detection analysis quantified sensitivity to body size distortions and response bias.
- Correlations were examined between adaptive probit estimation scores and other judgment measures.
Main Results:
- Students demonstrated sensitivity to a 4% body size distortion, with no systematic bias.
- Adaptive probit estimation scores significantly correlated with point of subjective equality and method of adjustment judgments.
- The method of adjustment resulted in both overestimation and underestimation of body size.
Conclusions:
- Adaptive probit estimation is a reliable method for assessing perceived body size.
- Individuals exhibit sensitivity to subtle body size distortions.
- Understanding response biases is key to interpreting body size judgments.