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In the psychometrics, reliability is the overall consistency of a measure. A measure is said to have a high reliability if it produces similar results under consistent conditions. For example, measurements of people’s height and weight are often extremely reliable.〔The Marketing Accountability Standards Board (MASB) endorses this definition as part of its ongoing (Common Language: Marketing Activities and Metrics Project ).〕 ==Types== There are several general classes of reliability estimates: *Inter-rater reliability assesses the degree of agreement between two or more raters in their appraisals. *Test-retest reliability assesses the degree to which test scores are consistent from one test administration to the next. Measurements are gathered from a single rater who uses the same methods or instruments and the same testing conditions.〔 This includes intra-rater reliability. *Inter-method reliability assesses the degree to which test scores are consistent when there is a variation in the methods or instruments used. This allows inter-rater reliability to be ruled out. When dealing with forms, it may be termed parallel-forms reliability.〔(Types of Reliability ) The Research Methods Knowledge Base. Last Revised: 20 October 2006〕 *Internal consistency reliability, assesses the consistency of results across items within a test.〔 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「Reliability (psychometrics)」の詳細全文を読む スポンサード リンク
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