Experiments and code to generate the GINC small-scale in-context learning dataset from "An Explanation for In-context Learning as Implicit Bayesian Inference"

Overview

GINC small-scale in-context learning dataset

GINC (Generative In-Context learning Dataset) is a small-scale synthetic dataset for studying in-context learning. The pretraining data is generated by a mixture of HMMs and the in-context learning prompt examples are also generated from HMMs (either from the mixture or not). The prompt examples are out-of-distribution with respect to the pretraining data since every example is independent, concatenated, and separated by delimiters. We provide code to generate GINC-style datasets of varying vocabulary sizes, number of HMMs, and other parameters.

Quickstart

Please create a conda environment or virtualenv using the information in conda-env.yml, then install transformers by going into the transformers/ directory and running pip install -e .. Modify consts.sh to change the default output locations and insert code to activate the environment of choice. Run scripts/runner.sh to run all the experiments on sbatch.

Explore the data

The default dataset has vocab size 50 and the pretraining data is generated as a mixture of 5 HMMs. The pretraining dataset is in data/GINC_trans0.1_start10.0_nsymbols50_nvalues10_nslots10_vic0.9_nhmms10/train.json while in-context prompts are in data/GINC_trans0.1_start10.0_nsymbols50_nvalues10_nslots10_vic0.9_nhmms10/id_prompts_randomsample_*.json.

This repo contains the experiments for the paper An Explanation of In-context Learning as Implicit Bayesian Inference. If you found this repo useful, please cite

@article{xie2021incontext,
  author = {Sang Michael Xie and Aditi Raghunathan and Percy Liang and Tengyu Ma},
  journal = {arXiv preprint arXiv:2111.02080},
  title = {An Explanation of In-context Learning as Implicit Bayesian Inference},
  year = {2021},
}
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