Update README.md

README.md

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   - split: test
     path: data/test-*
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+# Dataset Card for sst2_cognitive-bias
+<!-- Provide a quick summary of the dataset. -->
+
+This dataset is a modification of the original [SST-2](https://huggingface.co/datasets/stanfordnlp/sst2) dataset for LLM cognitive bias evaluation.
+
+- **Language(s):** English (<en>)
+
+## Dataset Structure
+
+- **idx**: original id in SST-2 dataset in the format <\<partition\>_\<id\>>.
+- **sentence**: test sentence.
+- **few_shot_string**: 4-shot string with examples from the original training split.
+- **few_shot_hard_string**: 5-shot string with the same examples as in <few_shot_string>, but with a neutral example inserted between the first and the last 2.
+
+The modifications carried out in the dataset are thought to evaluate cognitive biases in a few-shot setting and with different task complexities. 
+We make use of 25k instances from the original dataset, while the remaining ones serve as few-shot examples.
+Each instance is prompted with all possible unbalanced 4-shot distributions (<few_shot_string>), i.e. balanced distributions are not considered.
+We also increase task complexity by introducing an additional neutral example between the first and last wo examples (<few_shot_hard_string>).
+
+## Citation
+
+[In Press]
+
+**BibTeX:**
+
+[In Press]