How do randomized controlled trials (RCTs) differ from other pretest-posttest designs?
a) The focus is on intervention.
b) The researchers use random selection.
c) The experiment is in a lab.
d) The participants are representative.
Correct Answer: a
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Dr. Thornton discovers a gene that he calls AATF-1 (accelerated aging transcription factor-1). When Dr. Thornton deletes this gene in mice, the mice show increased longevity. Thus, he proposes a new model of aging that fits within the ____.
A. evolutionary theories of aging B. cellular-damage theories of aging C. homologous theories of aging D. programmed theories of aging
The criminal behavior of those diagnosed with antisocial personality disorder tends to a. continue to increase throughout the lifespan. b. increase dramatically at about age 30
c. decline significantly around age 40. d. remain stable throughout the lifespan.
______ use during pregnancy has been identified as the leading cause of developmental disabilities.
A. Caffeine B. Tobacco C. Alcohol D. Over-the-counter drugs
Many psychological problems stem from situations that are not under an individual's control. This fact counters the myth that ____
a. mental illness is incurable b. mental patients are usually dangerous c. most mental disorders are caused by inherited biological defects d. mental illness is caused by weak personal willpower