The finding that individuals' performance may be altered if they are subjects in an experimental treatment is known as the

a. treatment effect.
c. placebo effect.
b. experimenter effect.
d. Hawthorne effect.


D

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A "raw score" on an aptitude test is:

a) the number on a scale of 100 that scored above you. b) the number of questions you answered correctly. c) the percentage of questions you answered correctly. d) the number of wrong answers you had on a test.

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One of the reasons why babies born to women who smoke during their pregnancy show growth retardation (that is, they are small and lighter than average for their gestational age) is that nicotine

A. destroys many of the nutrients in the woman's blood. B. slows down the rate of cell division in the developing fetus. C. constricts the blood vessels and limits the flow of oxygen and nutrients through the placenta. D. makes the fetus more active and this additional activity reduces the size of the fetus.

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Because Down Syndrome is associated with increased maternal age, the incidence in the United States has increased

Indicate whether the statement is true or false

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What is meant by the term, homoscedasticity of a bivariate distribution?

What will be an ideal response?

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