GLM - 031:010 - Research Methods in Psychology Spring, 2010...

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031:010 - Research Methods in Psychology Spring, 2010 March 23 rd 1
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Outline The General Linear Model True Score Theory (revisited) “Additive Adjustments” experiment equations two types of factor 2
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GLM roots True Score Theory True Score Theory observed value (X) = T + error if we take many measures of the same thing while holding everything constant, then any variability in X is due to the random error, because T is assumed to be constant remember: T can only be assumed to be constant if everything else is constant 3
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GLM roots True Score Theory True Score Theory observed value (X) = T + error Infinite (possible) influences (or “adjustments”) error = sum of myriad sub-errors ( this is why it is often safe to assume that error is Normal ) X = T + A(e1) + A(e2) + A(e3) + + A(e ) 4
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True Score Theory observed value (X) = T + error Infinite (possible) influences (or “adjustments”) error = sum of myriad errors but we make no distinctions between the sub-errors so we continue to treat them as one thing X = T + error 5 GLM roots True Score Theory
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This note was uploaded on 04/29/2010 for the course PSYCH 002 taught by Professor Freeman during the Spring '08 term at University of Iowa.

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GLM - 031:010 - Research Methods in Psychology Spring, 2010...

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