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The Surprising Effectiveness of Test-Time Training for Few-Shot Learning

2024/11/11 by Ekin Akyürek, Akyürek, Ekin, Mehul Damani +14 · 17 voices · 40 citations
Computer Science · #Intelligent Tutoring Systems and Adaptive Learning

paper · pdf · doi:10.48550/arxiv.2411.07279

Abstract

Language models (LMs) have shown impressive performance on tasks within their training distribution, but often struggle with structurally novel tasks even when given a small number of in-context task examples. We investigate the effectiveness of test-time training (TTT) -- temporarily updating model parameters during inference using a loss derived from input data -- as a mechanism for improving LMs' reasoning and few-shot learning capabilities. On the Abstraction and Reasoning Corpus (ARC), performing TTT with in-context examples yields up to 6× higher accuracy compared to fine-tuned baselines -- reaching 53.0% on the public validation set with an 8B-parameter LM and 61.9% when ensembled with program-synthesis methods, matching average human performance. On BIG-Bench Hard (BBH), TTT on in-context examples surpasses standard few-shot prompting in the 10-shot setting by 7.3 percentage points (50.5% to 57.8%). Our findings highlight the limitations of in-context learning for novel tasks and demonstrate the potential of test-time training to enhance language model adaptability.

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