Browsing by Author "Smith, Philip L."

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    A comparison of the information provided by essay, multiple-choice, and free-response writing tests
    (1988) Ackerman, Terry A.; Smith, Philip L.
    This study investigated the similarity of information that is provided by direct and indirect methods of writing assessment. The skills required by each of these techniques provide a framework for a cognitive model of writing skills from which these procedures can be compared. It is suggested that practitioners interested in reliably measuring all aspects of the proposed writing process continuum, as characterized by this cognitive model, use both indirect and direct methods. Index terms: Confirmatory factor analysis, Essay tests, Free-response tests, Multiple-choice tests, Writing assessment, Writing processes.
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    Correlated effects in generalizability studies
    (1992) Smith, Philip L.; Luecht, Richard M.
    The analytical model typically used to perform generalizability analysis assumes that design effects are uncorrelated. Often, the assessment of behavioral data involves designs that employ multiple occasions or repeated trials (as in many observational and rating studies). In these cases, design effects may be serially correlated. The implications of serially correlated effects on the results of generalizability analyses are discussed. Simulated data are provided that demonstrate the biases that serially correlated effects introduce into the results. Index terms: correlated effects, estimation of variance components, generalizability theory, observational studies, repeated trials, serial correlation.