Which outcome is considered an age-related change in the physical apparatus of the eye of an elderly person?
A. the retina of a 60-year-old person receives a third as much light as a 20-year-old person
B. the optic nerve becomes more efficient in transmitting nerve impulses to the brain
C. the lens of the eye becomes thinner and more transparent
D. the elderly are less able to distinguish among colors
Answer: A
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Studies have found that failure to thrive may affect physical growth in childhood, but does not affect future ____
a. psychological health b. physical growth c. eating patterns d. cognitive functioning
Regarding the repair of the central nervous system, which of the following statements is FALSE?
a. Although animal studies have been conducted, no human trials involving the repair of damaged spinal cords have been undertaken yet. b. Scientists have partially repaired cut spinal cords in rats. c. Currently, a serious injury to the brain or spinal cord is usually permanent. d. Stem cells have been injected into the gap in the spinal cord to form a cellular bridge to repair the damaged spinal cord.
Dr. Hennepin is conducting a study on a new psychotherapy for depression. The depressed clients in his study are diverse, ranging greatly both in the presence of comorbid diagnoses and the severity of their depression; the therapists also are diverse, with different types of mental health training (clinical psychology, social work) and different levels of experience. Dr. Hennepin's study has a
high degree of external validity. What term is used for studies of this nature? a. a psychotherapy efficacy study b. a psychotherapy effectiveness study c. an analog treatment study d. a double-blind placebo trial
The study by DeLoache and her colleagues (1997) that used a "shrinking machine" demonstrated that young children's trouble with scale models is due to their
a. poor imagination skills. b. trouble dealing with models as symbolic representation. c. inability to remember the location of the hidden toy. d. difficulty in comprehending adult-directed speech.