The Effect of Signal Probability, Food Intake, Sex, and Smoking on Gustation, as Measured by the Theory of Signal Detection

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Abstract
The possibility of applying Signal Detection Theory (SDT) to gustation was investigated by testing the effect of three variables—smoking, signal probability, and food intake (confounded with time of day)—on the taste sensitivity to sucrose of 24 male and 24 female Ss. No main effects or interactions were significant. The study indicated a “warm-up” effect, while adaptation was questionable. An analysis of false alarm (FA) reports was undertaken and discussed. Correlations were obtained between numerous variables and sensitivity. None of the correlations was statistically significant. It was concluded that although SDT is theoretically applicable to the gustatory modality, it is not practical for large-scale research.

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