Prediction Is Not Calibration: Item Parameter Recovery and Representation Coupling in Knowledge Tracing
Study of 2PL, GPCM, and NRM decoders paired with LSTM, Transformer, and DKVMN encoders shows why item parameters, especially discrimination and option slopes, must be evaluated separately from response prediction.
Wen-Rui Yuan, S. M. van den Berg, J. Steinrücke
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