Of the following research designs, the one(s) requiring active manipulation

of the independent variable is (are) the

a. between-subjects
b. repeated-measures
c. matched-subjects
d. all of these

d

Psychology

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A physician prescribes Viagra to treat a patient's erectile dysfunction and advises him to be aware of possible side effects such as

a. insomnia and muscular pain. b. headaches and altered vision. c. hallucinations and body rashes. d. constipation and rapid heartbeat.

Psychology

__________ is an umbrella term for strategies and devices that help those with language impairments to engage in social interactions.

a. Assistive and auxiliary interaction b. Augmentative and alternative communication c. Compensatory communicative software d. Machine-augmented speech

Psychology