If I wanted to measure the number of nightmares in children before and after they learned a meditation technique, and the events of September 11, 2001 happened during the meditation training, it would be an example of which of these problems for experimentation?
a. history c. maturation
b. disruption d. testing
A
Any nonexperimental event that happens between the pretest and posttest is called history.
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Dale wants to design a good experiment and be sure there are no confounding variables. In other words, Dale wants to avoid:
a. an uncontrolled variable that changes systematically with the independent variable b. an uncontrolled variable that changes systematically with the dependent variable c. a controlled variable that changes systematically with the independent variable d. a controlled variable that changes systematically with the dependent variable
Babbling brooks and buzzing bees get their interesting sound qualities due to their:
A) loudness. B) pitch. C) purity. D) complexity.
In no other time before now has the brain and its influence on the development of human behavior received more attention
Indicate whether the statement is true or false
Early-maturing girls:
a. exhibit a heightened increase in concern over their body shape. b. have lower levels of depression than later-maturing girls. c. are less likely to engage in sexual activity than later-maturing girls. d. all of these