If 50 students were administered a classroom test, how many would be included in each group for the purpose of calculating d, the item-discrimination index?
A. 10
B. 17
C. 13
D. 25
Answer: C
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a. advertising wear-out b. pluralistic ignorance c. convert communication d. sensory overload
Individuals in Africa are most likely to become HIV positive following a. heterosexual sex with an infected partner
b. homosexual sex with an infected partner. c. repeated injections with unsterilized needles. d. close nonsexual contact with an infected person.
Which statement regarding deception in psychological research is TRUE?
A) Deception cannot be used. B) Deception is a standard practice to minimize demand characteristics and does not need to be justified. C) Deception cannot be used if it puts participants at risk of harm or pain. D) Deception involving exposure to harm or pain is only justified if debriefing is provided.
If the alpha level is changed from 0.05 to 0.01, what effect does it have on beta?
a. beta decreases c. beta is unaffected b. beta increases d. cannot be determined