A Quadratic Curve Equating Method to Equate the First Three Moments in Equipercentile Equating
A Quadratic Curve Equating Method to Equate the First Three Moments in Equipercentile Equating
A quadratic curve test equating method for equating different test forms under a random-groups data collec tion design is proposed. This new method extends the linear equating method by adding a quadratic term to the linear function and equating the first three central moments (mean, standard deviation, and skewness) of …