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Table 1 Nutritional features of milk reinforcers used and purpose of selection

From: Optimizing reproducibility of operant testing through reinforcer standardization: identification of key nutritional constituents determining reward strength in touchscreens

per 100 mL

Low-Fat Plain Milk (LM)

Strawberry Milk (SM)

Plain White Milk (PM)

Calories (kcal)

40

65

65

Total Carbohydrates(g)

4.5

10.5

4.5

 Sugars (g)

4.5

10

4.5

Protein (g)

3

2.5

3

Total Fat (g)

1

1.5

4

 Saturated Fat (g)

0.5

1

2.5

Cholesterol (mg)

2.5

5

10

Sodium (mg)

50

45

50

Intent of contrast

 Caloric content

low

high

high

 Fat/sugar content

 

high-sugar

high-fat

 Flavor

 

strawberry

plain