Does the Effect of a Time Limit for Testing Impair Structural Investigations by Means of Confirmatory Factor Models?

Schweizer, Karl; Reiß, Siegbert; Troche, Stefan (2019). Does the Effect of a Time Limit for Testing Impair Structural Investigations by Means of Confirmatory Factor Models? Educational and psychological measurement, 79(1), pp. 40-64. SAGE 10.1177/0013164418770824

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The article reports three simulation studies conducted to find out whether the effect of a time limit for testing impairs model fit in investigations of structural validity, whether the representation of the assumed source of the effect prevents impairment of model fit and whether it is possible to identify and discriminate this method effect from another method effect. Omissions due to the time limit for testing were not considered as missing data but as information on the participants’ processing speed. In simulated data the presence of a time-limit effect impaired comparative fit index and nonnormed fit index whereas normed chi-square, root mean square error of approximation, and standardized root mean square residual indicated good model fit. The explicit consideration of the effect due to the time limit by an additional component of the model improved model fit. Effect-specific assumptions included in the model of measurement enabled the discrimination of the effect due to the time limit from another possible method effect.

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