What correlation coefficient value indicates the "Friend" measure is reliable?
A researcher was interested in developing a reliable and valid measure of friendliness. That is, she wanted to distinguish between friendly and unfriendly people using her questionnaire. To determine whether she developed a good measure (called "Friend"), she administered her "Friend" questionnaire to a group of 300 people twice (Friend-Time 1 and Friend-Time 2), separated by six months. At the second testing session she also administered a similar questionnaire called "Nice," which previous research has shown to be a valid measure of people's ability to get along with people and to make friends. She also administered a questionnaire designed to measure art ability, which she predicted to be unrelated to friendliness. She observed the following correlations among the measures:
The test-retest reliability is .85.
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Dopamine synapses are most important for which of the following?
a. Rapid responses to visual or auditory stimuli b. Communication between the left and right hemispheres of the brain c. Maintaining equilibrium and balance d. Strong motivations such as sex or drug use
Nancy Schlossberg identified six basic paths to retirement. Describe these paths and apply each to the case of Gloria, a recent retiree.
What will be an ideal response?
The major advantage of repeated-measures designs is that
a. they allow you to use more subjects. b. they allow you to remove subject differences from the error term. c. they are easier to analyze. d. they have a higher level of ?.
Which of the following examples does not fit an evolutionary model to account for altruistic behavior?
a. ?The altruist’s acts increase the survival of family members. b. ?The altruism may be reciprocated someday, increasing survival. c. ?Selfish acts might be punished by group members. d. ?Altruism is transmitted by a culture through learning.