SugarCrepe++

The SUGARCREPE++ dataset evaluates the sensitivity of vision language models (VLMs) and unimodal language models (ULMs) to semantic and lexical alterations. Each sample in the SugarCrepe++ dataset consists of an image and a corresponding triplet of captions: a pair of semantically equivalent but lexically different positive captions and one hard negative caption. This poses a 3-way semantic (in)equivalence problem to the language models. The SUGARCREPE dataset consists of (only) one positive and one hard negative caption for each image. Relative to the negative caption, a single positive caption can either have low or high lexical overlap. The original SUGARCREPE only captures the high overlap case. To evaluate the sensitivity of encoded semantics to lexical alteration, we require an additional positive caption with a different lexical composition. SUGARCREPE++ fills this gap by adding an additional positive caption enabling a more thorough assessment of models’ abilities to handle semantic content and lexical variation.