Internal validity is threatened by:
A. the presence of quasi-independent variables in your study.
B. running your experiment under highly artificial conditions.
C. choosing the wrong strategy to answer your questions.
D. the operation of extraneous, uncontrolled variables.
Answer: D
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Suzanne Kobasa and her colleagues studied business executives who seemed able to resist illness despite stress. In one phase of the research, executives completed a battery of psychological tests, and the researchers found that the psychologically hardy executives tended to:
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Bisiach’s test on hemineglect did provide support for a true deficit in attending to certain visual stimuli. However, one limitation noted in the textbook is that ____
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"Split brain" patients are patients who have had ______
a. a prefrontal lobotomy b. their cerebellum split in the middle c. their corpus callosum cut d. their brain stem cut down the middle
Eleven-year-old Maria had always been about the same size as her 9-year-old brother Domingo until recently. Maria is now almost two inches taller than her brother and she has also noticed she has gained some weight
Maria is most likely going through a. menarche. c. secular trend. b. an adolescent growth spurt. d. psychosomatic disorders.