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intuition - What is perplexity? - Cross Validated I came across term perplexity which refers to the log-averaged inverse probability on unseen data Wikipedia article on perplexity does not give an intuitive meaning for the same This perplexity
Comparing Perplexities With Different Data Set Sizes Would comparing perplexities be invalidated by the different data set sizes? No I copy below some text on perplexity I wrote with some students for a natural language processing course (assume log log is base 2): In order to assess the quality of a language model, one needs to define evaluation metrics One evaluation metric is the log-likelihood of a text, which is computed as follows