To investigate the effects of a new drug for hyperactivity,
one group of children is given this new drug, while the other group is given a placebo. The experimenter has his assistant label the drug and the placebo with letter names so that he will not know which group of children is getting the placebo and which group is getting the new drug until the end of the experiment. This researcher is using a
a. double-blind experiment to minimize research participant bias and researcher bias.
b. single-blind experiment to minimize observer bias and the observer effect.
c. triple-blind experiment that incorporates random selection and random assignment.
d. placebo effect to maximize the self-fulfilling prophecy.
ANSWER: a
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HIV infection measles toxoplasmosis alcohol
The distance between far off objects appears to be smaller than the distance between nearby objects. This contributes to
a. perspective. c. clearness. b. overlapping. d. phi phenomenon.
Nicholas's therapist suggests that his inability to recall any
specifics from the dozens of times he was sexually abused by his great-uncle results from a second personality that is protecting him. After being hypnotized, a personality called "Biff" emerges that Nicholas is unaware of. This finding is most consistent with the _____ explanation of dissociative identity disorder. Fill in the blank with correct word
Which coefficient represents the strongest degree of relationship, or association?
(a) .00 (b) .44 (c) .88 (d) .30 (e) 2.20