InstrumentationChapter OutlineWhat are Data? Validity, Reliability, and Objectivity Usability Means of Classifying Data-Collection Instruments Where did the Instrument Come From? Written Response Versus Performance Examples of Data-Collection Instruments Subject-Completed Instruments Unobtrusive Measures Types of Scores Derived Scores Which Scores to Use? Norm-Referenced Versus Criterion Referenced Instruments Criterion-Referenced Instruments Measurement Scales Ordinal Scales Interval Scales Ratio Scales Measurement Scales Reconsidered Preparing Data for Analysis Tabulating and Coding the Data | ||||||
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