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The Sense of Taste: Biology and Psychology!

The Sense of Taste: Biology and Psychology!. The Basic Tastes. Salty Sweet Sour Bitter Umami ??. MYTH!. Correct Science (From Nature ). Fig. 15-15, p. 368. Aspects of Taste are Learned. Learned taste aversion Cultural taste preferences – spicy

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The Sense of Taste: Biology and Psychology!

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  1. The Sense of Taste: Biology and Psychology!

  2. The Basic Tastes • Salty • Sweet • Sour • Bitter • Umami??

  3. MYTH!

  4. Correct Science (From Nature)

  5. Fig. 15-15, p. 368

  6. Aspects of Taste are Learned • Learned taste aversion • Cultural taste preferences – spicy • Young children prefer foods eaten by mom during pregnancy (some evidence)

  7. Taste Varies Biologically Among Individuals • PTC, Thiourea, Sodium Benzoate • Best studied in PTC – single gene • Individuals can be homozygous tasters, heterozygous, or homozygous non-tasters • Gene found in chimps as well! • Why useful to taste bitter? • Why useful to be heterozygote?

  8. Taste Preferences Seem to Change with Age: Biological Shifts • NPR Story

  9. Biological Psychology Method: Magnitude Estimation • Ask subjects to report their experience while varying the stimulus • When we make a stimulus twice as intense, does the subject perceive it as twice as intense? • Length of line • Brightness of light • Intensity of shock pain • Sweetness of taste??

  10. The Relationship Between the Intensity of Sensory Experiences and the Size of the Stimulus Varies Across Senses Fig. 1-15, p. 16

  11. Sweetness is like Brightness • As more sugar as added, we do NOT taste it as twice as sweet • Will our results support this published finding??

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