Lecture 17 Outline

I.  Taste learning with nausea versus other US’s, 
distaste versus danger distinction

	A. Pelchat study with rats

		1. sucrose --> LiCl (nausea)

		2. sucrose --> shock

		3. assessed taste reactivity, only "1." showed
			aversive reactions, "2." showed appetitive
			reactions

		4. also did a study feeding rats lactose, no
			aversive reactions developed to lactose taste
			even though it caused diarrhea in rats

	B. Pelchat study with humans

		1. Questionnaire with 3 sections, rated how
			much they like each food on 1 to 9 scale

			a. lactose intolerance

			b. allergy

			c. other discomfort or illness

		2. checklist of symptoms, divided into

			a. nausea primary

			b. nausea secondary

			c. other GI (diarrhea, gas, etc.)

			d. other (non-GI, non-cutaneous, e.g., 
				headache)

			e. skin

		3. only symptoms of nausea led to large change
			in liking of foods

	C. Bernstein ice cream study in children

		1. Mapletoff ice cream --> chemo (nausea)

		2. time with toy --> chemo (nausea)

		3. Mapletoff ice cream --> other chemo (no
			nausea)

		4. 3 x as many children in "2." and "3." chose to
			eat ice cream in test

II. Flavor preference learning

		A. two types

			1. taste-taste learning

			2. taste-calorie learning

			3. Example of both, Coldwell study

				a. train grape-sugar, cherry-water

				b. or train cherry-sugar, grape-water

				c. test grape-water vs. cherry-water

				d. rats prefer flavor previously given
					in sugar

			4. Example of taste-taste, replace sugar w/
				saccharin in above study

			5. Example of taste-calorie, give grape or
				cherry flavor and put caloric substance
				directly into the stomach as the rat
				drinks