Which of the following is the MOST serious violation of an assumption for the t test for independent means?
A) The sample size is smaller than 15.
B) The populations are both dramatically negatively skewed.
C) The populations are both dramatically positively skewed.
D) The populations are dramatically skewed in opposite directions.
D
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Color blindness and color afterimages are best explained by what theory of color vision?
A) trichromatic theory B) visible hue theory C) Opponent-process theory D) dichromatic theory E) binocular disparity theory
In 1908, Hermann Ebbinghaus wrote that "Psychology has a long past, but only a short history." Which statement best captures the idea that Ebbinghaus was expressing?
a. Psychologists, like philosophers, have difficulty learning from their mistakes. b. Questions about human nature have existed for a long time, but only recently have the methods necessary to answer them been developed. c. The field of psychology has existed for a long time, but only recently have scholars recorded the accomplishments of the profession. d. Although psychologists have been doing laboratory research for hundreds of years, little of substance has been discovered about human nature.