Spline Function
A flexible function form assembled from piecewise polynomials, with smoothness constraints satisfied at the connection points between segments. It allows the function to exhibit different curvatures in different intervals, making it suitable for fitting complex relationships. Common types include natural cubic splines and B-splines.
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The research team used spline functions and item response theory (IRT) to recalculate the raw data and found that the fitted spline function exhibits clear nonlinear characteristics.
The fitted spline function is nearly flat in the interval of roughly 2 to 30 minutes, while it is close to linear in other intervals.
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The research team used spline functions and item response theory (IRT) to recalculate the raw data and found that the fitted spline function exhibits clear nonlinear characteristics.
50%UnverifiedThe fitted spline function is nearly flat in the interval of roughly 2 to 30 minutes, while it is close to linear in other intervals.
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