One's natural sleep need
a. changes with one's mood and physical activity.
b. is indicated when one can wake without an alarm clock and feel rested.
c. is really nine hours for all adults.
d. is really six hours for all adults.
ANSWER: b
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Which statement concerning food intake in elderhood is most accurate?
a. Because of the reduced need for calories, very old people have less of a chance of malnutrition than younger people. b. Because of the increased need for calories, very old people will feel very weak and lose resilience if they keep eating only as much as they have previously. c. Slowed metabolism increases the very old person's need for calories. d. Because of a diminished appetite, the very old person must become more conscientious in selecting foods that will provide the nutritional elements necessary for healthy functioning.
If raw scores ranging from 1 to 50 represented all the corresponding negative z-scores on the distribution, and raw scores ranging from 50 to 100 represented all the corresponding positive z-scores, what would be the total relative frequency of 50 to 100?
a. 1.00 c. 0.50 b. 0.75 d. 0.25
Correlational research helps scientists demonstrate causal connections
Indicate whether the statement is true or false
When employing reversal designs in intrasubject research, two problems often occur: 1) the effect of the researcher's intervention may not be reversible; and 2)
a. these designs require many between-subject manipulations b. implementing these AB designs is often expensive. c. it may be unethical to withdraw a beneficial treatment. d. it is difficult to recruit large numbers of subjects required in these designs.