The preferred research method for asking questions about cause-and-effect relationships is
A) an experiment.
B) a correlation.
C) path analyses.
D) naturalistic observation.
A) an experiment. Because subjects are randomly assigned to conditions in an experiment, any differences in their performance or behavior must be due to their respective experimental condition.
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The vocabulary of a typical child, age 6, is from 8,000 to 14,000 words, although that vocabulary grows by another __________ words between the ages of 9 and 11.
A. 1,000 B. 2,000 C. 5,000 D. 10,000
The psychometric properties of the Rorschach have been difficult to evaluate because
a. the Rorschach is difficult to administer. b. there is no universally accepted method of administration. c. responses can only be subjectively evaluated. d. the Rorschach has no clinical utility.
Cattell's mental tests, like those of Galton, dealt primarily with sensorimotor measures
a. True b. False
Aaron has an IQ of 59, but does not have any problems in the 11 areas of adaptive skills. Is Aaron considered intellectually disabled?
A. No-his IQ is not subaverage B. No-he needs limitations in four areas of adaptive skills C. No-he does not have deficits in adaptive skills D. Yes-he fits the definition of mental retardation