According to Buck's studies of human facial expressiveness:
a. men are more facially expressive than women.
b. women are more facially expressive than men.
c. men are better at reading facial expression than women.
d. men and women are equally skilled at displaying and reading facial expression.
b
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Explain the difference between internal validity and external validity in experimental research. Why must experimenters usually make a "trade-off" between internal and external validity?
What will be an ideal response?
Dr. Harrison writes down the names of her subjects on slips of paper and puts them in a box. She shuffles them and begins to draw names one at a time. She assigns every other subject to the experimental group of her experiment. This is an example of:
A. randomly assigning subjects to the conditions of the experiment. B. systematically assigning subjects to the conditions of the experiment. C. holding extraneous variables constant across the levels of the independent variable. D. None of the answers is correct.
According to Piaget's model, Latifa has entered the preoperational stage. Which tier would Fischer use to describe Latifa's development?
A. abstractions B. reflexive C. sensorimotor action D. representations
Which of the following is not part of the method section of a research article?
a. procedure b. analyses c. materials d. participants e. all of these are sections of the method