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The multitrait-multimethod (MTMM) matrix is an approach to examining construct validity developed by Campbell and Fiske(1959).〔Campbell, D.T., & FiskeD.W. (1959) Convergent and discriminant validation by the multitrait-multimethod matrix. ''Psychological Bulletin'', ''56'', 81-105 "〕 It organizes convergent and discriminant validity evidence for comparison of how a measure relates to other measures. ==Definitions and Key Components== Multiple traits are used in this approach to examine (a) similar or (b) dissimilar traits ( constructs), as to establish convergent and discriminant validity between traits. Similarly, multiple methods are used in this approach to examine the differential effects (or lack thereof) caused by method specific variance. There are six major considerations when examining a construct's validity through the MTMM matrix, which are as follows: 1. Evaluation of convergent validity — Tests designed to measure the same construct should correlate highly amongst themselves. 2. Evaluation of discriminant (divergent) validity — The construct being measured by a test should not correlate ''highly'' with different constructs. 3. Trait-method unit- Each task or test used in measuring a construct is considered a trait-method unit; in that the variance contained in the measure is part trait, and part method. Generally, researchers desire low method specific variance and high trait variance. 4. Multitrait-multimethod — More than one trait and more than one method must be used to establish (a) discriminant validity and (b) the relative contributions of the trait or method specific variance. This tenet is consistent with the ideas proposed in Platt's concept of Strong inference (1964).〔John R. Platt (1964). "Strong inference". Science 146 (3642). 〕 5. Truly different methodology — When using multiple methods, one must consider how different the actual measures are. For instance, delivering two self-report measures are not truly ''different'' measures; whereas using an interview scale or a psychosomatic reading would be. 6. Trait characteristics — Traits should be different enough to be distinct, but similar enough to be worth examining in the MTMM. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Multitrait-multimethod matrix」の詳細全文を読む スポンサード リンク
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