Placebo control groups and double-blind procedures are typically used to control for
A. individual differences variables and matching variables.
B. demand characteristics and experimenter effects.
C. selective subject loss and mechanical subject loss.
D. manipulated variables and extraneous variables.
B. demand characteristics and experimenter effects.
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The fact that links between attitudes and behaviors may be weak is referred to as the _____ problem
Fill in the blank(s) with correct word
The hypothesis testing process is the same for correlational studies and experiments.
Answer the following statement true (T) or false (F)
One important criticism of Piaget's theory is that
A) he overestimated the competencies of infants and young children. B) his stagewise account pays insufficient attention to social and cultural influences. C) he overemphasized discovery learning and direct contact with the environment. D) children's performance on Piagetian tasks cannot be improved with training.
Which of the following statements about in vitro fertilization is true?
A) About 10 percent of American babies are conceived through this technique. B) It cannot be performed on women whose fallopian tubes have been damaged. C) Doctors are required to keep records of the characteristics of sperm donors. D) The success rate of in vitro fertilization declines steadily with age.