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2.3 Validity and Control of Extraneous Variables 1)Validity is best achieved by A)not interfering with variables. B)simply reporting all observations. C)choosing a well-studied area of research. D)controlling for extraneous variables. 2)In designing her research experiment, Jane is trying to make sure that the test she uses really measures what it is supposed to. Jane is concerned with A)validity. B)impressing her colleagues. C)ethics. D)causation. 3)Validity A)is something that cannot be achieved. B)refers to how well a measure or study performs. C)is a separate statistical measure used by natural scientists. D)is a way of including extraneous variables to give the study more meaning. 4)Extraneous variables are threats to the ________ of a study. A)predictability B)validity C)authenticity D)replicability 5)Which of the following is TRUE about control in research? A)It is only necessary in high-constraint research. B)It is only necessary in low-constraint research. C)It is only necessary in laboratory experiments. D)It is necessary in all types of research. 6)General control procedures can be implemented in research A)only in low-constraint research designs. B)only in high-constraint research designs. C)only in experimental research designs. D)at many different levels of constraint. 7)Proper control in an experiment A)enhances validity. B)threatens validity. C)is determined by the study particpants. D)is determined by the REB. 8)We seek to control extraneous variables in research because they A)are threats to reliability. B)distract the participants. C)reduce validity. D)reflect the experimenter’s planned biases. 9)Being concerned with whether a study answers the questions it posed is a concern for the study’s A)reliability. B)replicability. C)validity. D)representativeness. 10)An example of an extraneous variable in a study designed to explore a child’s unique problem-solving strategies is A)the child’s response time for each problem set. B)the number of correct answers a child achieves without assistance. C)unrequested assistance from other children in solving the problems. D)

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