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Researchers at Stanford Propose a Family of Representation Finetuning (ReFT) Methods that Operates on a Frozen Base Model and Learn Task-Specific Interventions on Hidden Representations

Here is the key information in a clear and simple format:

1. **Parameter-efficient Finetuning (PEFT) Methods**: These methods update only a fraction of the weights, reducing memory usage and training time.

2. **Representation Finetuning (ReFT) Methods**: They train interventions to manipulate a small fraction of model representations, steering model behaviors to solve downstream tasks at inference time.

3. **Low-rank Linear Subspace ReFT (LoReFT)**: This method intervenes on hidden representations in the linear subspace spanned by a low-rank projection matrix, demonstrating state-of-the-art performance on various benchmarks while using significantly fewer parameters than traditional PEFT methods.

4. **Evaluation Practices**: It’s essential to establish fair benchmarks for comparing PEFTs and ReFTs, ensuring real-world performance assessment.

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