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A Multilevel Nonlinear Approach Of Piecewise Regression For Detecting Turning Points: Developing An Alternative Platform With An Application Of Timss, Jing Zhang
Theses and Dissertations--Education Sciences
Studies in recent years have explored the methods of identifying the turning points when dealing with the non-linear relationship. Four approaches applied by researchers, the eyeball approach, the establishment approach, the theory-driven approach, and the data-driven approach, are all under the traditional piecewise regression framework when seeking turning points. Thus, the purpose of this study is to introduce a multilevel piecewise regression model to identify the turning point beyond the traditional piecewise regression, as a completely non-linear approach.
Data used for this study is TIMSS 2019 United States sample. TIMSS is a project guided by the International Association for the …