Subjects are said to be assigned randomly when
a. they are selected to participate in an experiment from a sample which is representative of the larger population.
b. they each have an equal chance of being assigned to either the experimental or control group.
c. they are assigned to experimental and control groups so that the groups differ on some critical variable before the experiment begins.
d. neither the experimenter nor the subject knows whether the subject is in the experimental or control group.
b
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Gall believed which of the following??
a. ?There is no relationship between the size of the cortex and intelligence. b. ?The faculties of the mind are aspects of the soul, not of the brain. c. ?The bumps and indentations on the skull indicate the magnitude of the underlying faculties. d. ?The mind functions as an indivisible whole.
Kelsey just told her family a really funny joke that she made up herself. In order to use a secondary reinforcer to encourage her to keep telling jokes, Kelsey's dad might ________.
Fill in the blank(s) with the appropriate word(s).