Research evidence has shown that the presence of a weapon
a. increases the accuracy of the account.
b. reduces the ambiguity of the interpretation of the situation.
c. impairs an eyewitnesses accuracy of a description of a suspect.
d. allows an eyewitness to remember the event longer.
C
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By age 2, the average child in the United States weighs around __________ pounds and is close to __________ tall.
A. 50 to 60; 43 inches B. 25 to 30; 36 inches C. 40 to 65; 50 inches D. 25 to 50; 38 inches
Which statement concerning Piaget's theory is true? a. Piaget's theory has been the source of ideas for teachers and stimulated a great deal of research. b. Piaget's theory was never useful for teachers but did stimulate a great deal of research
c. Piaget's theory has been the source of ideas for teachers but never stimulated research. d. Piaget's theory was never useful for teachers and never stimulated research.
Appeals to authority are generally considered a(n) ____________ kind of evidence because _______________________
A) reliable; experts know a lot about their subjects B) reliable; experts don't want to ruin their reputations by being wrong C) unreliable; most experts don't know what they are talking about D) unreliable; expertise is not actually evidence
Which of the following variables is presumed to vary as a result of the researcher's manipulation of another factor or condition?
a) control b) dependent c) independent d) random