How many threats to internal validity must researchers contend with?
A) 1 B) 2 C) 7 D) 9 E) 20
D
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The term "juvenile delinquent" is __________.
A. used when a diagnosis of early-onset antisocial personality disorder has been made B. defined by the legal system C. inconsistent with the diagnostic criteria for conduct disorder D. rarely used in modern times
Some threats to internal validity are related to time and other threats are related to differences between groups. What is a threat related to time?
a. history effects b. assignment bias c. selection bias d. differential attrition
Based on the intelligence quotient formula developed by Lewis Terman, an individual with a chronological age greater than his or her mental age would:
a. have an IQ greater than 100 b. have an IQ equal to 100 c. excel in most school subjects d. have an IQ less than 100
Exposure to heavy metals (mercury, antimony, lead, or zinc) is known to yield all of these effects EXCEPT
a. physical deformities. b. impaired physical health. c. mental retardation. d. faster learning.