PSYC3180 Midterm Practice Questions with Answers

PSYC3180 Midterm Practice Questions with Answers - what is...

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what is multitrait / multimethod design? the researcher chooses two or more constructs that are unrelated in theory and two or more types of tests - such as objective, projective, and peer rating - to measure each of the constructs. -data are collected on each participant in the study on each construct using each method. -a way to collect evidence of convergence reliability, discriminant reliability. what is multitrait / multimethod design? the researcher chooses two or more constructs that are unrelated in theory and two or more types of tests - such as objective, projective, and peer rating - to measure each of the constructs. -data are collected on each participant in the study on each construct using each method. -a way to collect evidence of convergence reliability, discriminant reliability. what does the mulittrait / multimethod design show us? 1. shows relationship between reliability and validity -reliability can be defined & understood as two measures of the same trait using the same method. - validity defined as two measures of the same trait using (even slightly) different methods. 2.shows how much of the relationship between scores on x and y due to use of the same method to measure both -effect of shared "method variance" seen in solid triangles. -such "method bias" a real problem given out extensive reliance on self- report methods describe the characteristics of a "good" test according to multitrait/ multimethod -a good test is one that is correlated well with other measures of the same construct, is NOT correlated with measures of other constructs ex-shows both convergent and discriminant validity what are the advantages of the multitrait-mutlimethod matrix? advantage -methodology that enables one to get both sides of the construct validity coin in a single study -emprirical method of doing so, lets data speak for itself rather than relying on judgement -unique way of illustrating difference between reliability and validity what are the disadvantages of multitrait-multimethod matrix?
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disadvantages -very difficult to find alternative methods of measuring constructs (at least reliable ones) -"cost" of generating such a study is enormous -convergent validity should exeed discriminant validity, but by how much?
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