Error scores - PowerPoint PPT Presentation

Psy 425 Tests &amp; Measurements

Psy 425 Tests &amp; Measurements. Furr &amp; Bacharach Chapter 5 Conceptual Basis for Reliability. True Scores?. Do scores on a test accurately reflect real psychological differences? Assessment of reliability Detecting the ability of a test to accurately reflect real differences.

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Measurement

Measurement. EDRS 6301 Summer 2001 Dr. Kielborn. Measurement. All measures contain error Random error leads to unreliability Systematic error leads to invalidity True Score = Obtained Score + Random Error. A true score is the real and unchanging measure of the human characteristic.

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Error scores - PowerPoint PPT Presentation

Psy 425 Tests &amp;amp; Measurements

Measurement

Psy 425 Tests & Measurements