DELTA: Dynamic Embedding Learning with Truncated Conscious Attention for CTR Prediction

• URL: http://arxiv.org/abs/2305.04891v3
• Date: Tue, 5 Sep 2023 07:24:00 GMT
• Title: DELTA: Dynamic Embedding Learning with Truncated Conscious Attention for CTR Prediction
• Authors: Chen Zhu, Liang Du, Hong Chen, Shuang Zhao, Zixun Sun, Xin Wang, Wenwu Zhu
• Abstract summary: Click-Through Rate (CTR) prediction is a pivotal task in product and content recommendation. We propose a model that enables Dynamic Embedding Learning with Truncated Conscious Attention for CTR prediction.
• Score: 61.68415731896613
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Click-Through Rate (CTR) prediction is a pivotal task in product and content recommendation, where learning effective feature embeddings is of great significance. However, traditional methods typically learn fixed feature representations without dynamically refining feature representations according to the context information, leading to suboptimal performance. Some recent approaches attempt to address this issue by learning bit-wise weights or augmented embeddings for feature representations, but suffer from uninformative or redundant features in the context. To tackle this problem, inspired by the Global Workspace Theory in conscious processing, which posits that only a specific subset of the product features are pertinent while the rest can be noisy and even detrimental to human-click behaviors, we propose a CTR model that enables Dynamic Embedding Learning with Truncated Conscious Attention for CTR prediction, termed DELTA. DELTA contains two key components: (I) conscious truncation module (CTM), which utilizes curriculum learning to apply adaptive truncation on attention weights to select the most critical feature in the context; (II) explicit embedding optimization (EEO), which applies an auxiliary task during training that directly and independently propagates the gradient from the loss layer to the embedding layer, thereby optimizing the embedding explicitly via linear feature crossing. Extensive experiments on five challenging CTR datasets demonstrate that DELTA achieves new state-of-art performance among current CTR methods.

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