A cross-sequential design:

examines a single group of people who are the same age at one point in time.
examines two or more groups of people who are of different ages at one point
in time.
follows a single group of people over an extended period of time.
follows two or more groups of people who are of different ages over a period of
time.

follows two or more groups of people who are of different ages over a period of
time.

Psychology

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Transient ischemic attacks (TIAs) a. produce symptoms of stroke lasting less than 24 hours

b. produce very mild stroke symptoms that last indefinitely. c. are typically fatal within a few hours. d. are very common and do not require medical treatment.

Psychology

Negative reinforcement is best thought of as __________.

A. reinforcement for an undesirable activity B. punishment C. something that was predicted to serve as reinforcement but did not do so D. stimuli whose termination or removal increases behavior

Psychology