Q-matrix
A knowledge mapping table in cognitive diagnosis that links items to skills, indicating the skills assessed by each item; it is a prerequisite for the identifiability of cognitive diagnostic models.
Timeline (last 90 days)
The second branch of AICG uses an expert-designed Q-matrix to associate answers with the skills being assessed, and jointly predicts skill mastery and learning gains derived from the G-DINA model.
Ablation experiments show that Q-matrix-guided cognitive supervision is the main source of AICG's performance improvement.
The Q-matrix is a knowledge mapping table connecting items and skills, with rows corresponding to items and columns to skills, where matrix elements indicate whether an item assesses a certain skill, and it is usually designed manually by subject experts.
In the Transformer, the Q, K and V matrices are obtained by multiplying the hidden representations of the input sequence by three learnable weight matrices W_Q, W_K and W_V respectively.
All Facts (4)
The second branch of AICG uses an expert-designed Q-matrix to associate answers with the skills being assessed, and jointly predicts skill mastery and learning gains derived from the G-DINA model.
50%UnverifiedAblation experiments show that Q-matrix-guided cognitive supervision is the main source of AICG's performance improvement.
50%UnverifiedThe Q-matrix is a knowledge mapping table connecting items and skills, with rows corresponding to items and columns to skills, where matrix elements indicate whether an item assesses a certain skill, and it is usually designed manually by subject experts.
50%UnverifiedIn the Transformer, the Q, K and V matrices are obtained by multiplying the hidden representations of the input sequence by three learnable weight matrices W_Q, W_K and W_V respectively.
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