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3.1 Measurement 1)A variable is A)anything that varies a specific amount. B)any characteristic that can take more than one value. C)used only in well controlled experimental research. D)always manipulated by researchers. 2)The level of measurement of the dependent variable affects the A)statistical procedures. B)observational procedures. C)observational analysis. D)quasi-experimental observational procedures. 3)Samantha is designing a study to determine the effect of noise on anxiety levels. Which of the following would be considered a variable in the study? A)Samantha, the researcher. B)The location of the study. C)Anxiety levels. D)The number of particpants in the study. 4)To measure a variable means A)to control for external validity. B)to increase its reliability. C)assign numbers to it. D)match it with another variable. 5)The major task in measurement is to A)make sure variables are arranged in the proper order. B)make sure the proper measurement is taken. C)represent the research variables numerically. D)make sure all participants are counted. A)it is usually not a problem, since there is always some measurement error. B)it can be corrected by using appropriate statistical procedures. C)serious errors in data analysis and interpretation can occur. D)it is not a problem as this always occurs; it is never possible to accurately apply the number system. 7)Psychologists are limited in the type of mathematical operations they can perform on the data chiefly because A)they do not have adequate training in mathematics. B)the characteristics of the variables do not match the characteristics of the real number system. C)computers are not yet sophisticated enough to do the necessary calculations. D)they often don’t think it is necessary to assign numbers to the data since the data speak for themselves. 8)”Equal intervals” implies that A)numbers have an inherent order from smaller to larger. B)each number has a particular meaning. C)the difference between units is the same anywhere on the scale. D)an IQ of 120 is twice as high as an IQ of 60. 9)The fact that 600 is larger than 500 illustrates the mathematical property of A)magnitude. B)identity. C)equal intervals. D)magnanimity. 10)The fact that the difference between 5 and 7 is the same as the difference between 52 and 54 illustrates the mathematical property of A)symmetry. B)equal intervals. C)magnitude. D)

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