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Using segmented linear regression models with unknown change points to analyze strategy shifts in cognitive tasks.

K Luwel·A L Beem·P Onghena·L Verschaffel
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Abstract

Some years ago, Beem (1993, 1995) described a program for fitting two regression lines with an unknown change point (Segcurve). He suggested that such models are useful for the analysis of a variety of phenomena and gave an example of an application to the study of strategy shifts in a mental rotation task. This technique has also proven to be very fruitful for investigating strategy use and strategy shifts in other cognitive tasks. Recently, Beem (1999) developed SegcurvN, which fits n regression lines with (n - 1) unknown change points. In the present article we present this new technique and demonstrate the usefulness of a three-phase segmented linear regression model for the identification of strategies and strategy shifts in cognitive tasks by applying it to data from a numerosity judgment experiment. The advantages and shortcomings of this technique are evaluated.

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AttentionHumansLinear ModelsPattern Recognition, VisualProblem SolvingPsychophysicsEvaluation StudyJournal ArticleResearch Support, Non-U.S. Gov't

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K Luwel, A L Beem, P Onghena, L Verschaffel. 2001. Using segmented linear regression models with unknown change points to analyze strategy shifts in cognitive tasks.. https://doi.org/10.3758/bf03195404

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