A researcher interested in the health problems of people with schizophrenia interviews only those people diagnosed with the disorder who are in an inpatient facility. The most glaring weakness in this study is

a. the absence of correlational statistics.
b. the failure to use DSM-IV criteria for health problems.
c. having an inappropriate control group.
d. nonrepresentative sampling.

d. nonrepresentative sampling.

Psychology

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The theory that provides an explanation for aging that focuses on the importance of the reproduction of our species is

the genetic clock theory. the epigenetic theory. the wear-and-tear theory. cellular accidents theory.

Psychology

Dark adaptation is the process by which visual receptors become maximally sensitive to dim light

Indicate whether this statement is true or false.

Psychology