In a double-blind experiment:
A) the researcher conducting the posttreatment assessment does not know which participants were given the treatment and which had been assigned to a wait-list control.
B) the researchers conducting the treatment send their data to an impartial laboratory for analysis; they are kept blind as to the results of the study until publication.
C) both the experimenter and the participant are uninformed about which treatment the participant is receiving.
D) participants never know if they were given the treatment or not.
C) both the experimenter and the participant are uninformed about which treatment the participant is receiving.
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Which of the following has been found to help older adults maintain a sense of wellbeing?
a. Finding meaning in one's existence b. Blood pressure medicine c. Self-absorption d. Living with one's children
The cones of the retina
a. number about five million in each human eye. b. are specialized for seeing black and white sensations. c. occur most commonly in the periphery of the retina. d. allow us to see in dim light.
Judgments made by a professional can be called
a) clinical prediction b) statistical prediction c) numeric prediction d) factor analytic prediction
Newborns sleep about________ hours per day
A) 8 to 9 B) 10 to 12 C) 16 to 18 D) 20 to 22