Based on Rosenfeld's study of very old men, approximately what percentage of 90-year-old Walter's 90-year-old male friends feel that their lives were rich and rewarding?
A. 10-15%
B. 25-30%
C. 50%
D. 90%
Answer: C
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Neurological research shows that images of homeless people and drug addicts evoke the same brain activity in the amygdala as when we feel _______.
a. disgust b. fear c. pity d. depressed
Explain what you can learn from testing relationships between measures.
What will be an ideal response?
James’ grandmother was recently diagnosed with Alzheimer’s disease. James wanted to do some research so that he could help his grandmother better understand this disease. Through his research, James found that Alzheimer’s involves the deterioration of what neurotransmitter?
A. dopamine B. acetylcholine C. serotonin D. GABA (gamma-aminobutyric acid) E. endorphin
When a researcher asks the question, "Have subjects been pre-selected so as to represent the extremes on the variable of interest?" she is concerned with which one of the following potential threats to internal validity?
a. testing effect b. maturation c. subject selection d. regression effect