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Currently the field is getting an impulse for further development now that vast data sets of user generated data is becoming available. From this point on in the discussion, we will present female confidence as positive numbers and male as negative.
As for systems, we will involve all five systems in the discussion. Before being used in comparisons, all feature counts were normalized to counts per words, and then transformed to Z-scores with regard to the average and standard deviation within each feature. We then measured for which percentage of the authors in the corpus this score was in agreement with the actual gender.
The tokenizer is able to identify hashtags and Twitter user names to the extent that these conform to the conventions used in Twitter, i. The position in the plot represents the relative number of men and women who used the token at least once somewhere in their tweets. On the female side, everything is less extreme. The control shell then weighted each score by multiplying it by the class separation value on the development data for the settings in question, and derived the final score by averaging. Finally, we included feature types based on character n-grams following kjell et al.
If, in any application, unbalanced collections are expected, the effects of biases, and corrections for them, will have to be investigated. Where Cohen assumes the two distributions have the same standard deviation, we use the sum of the two, practically always different, standard deviations. Unigrams Single tokens, similar to the top function words, but then using all tokens instead of a subset.
The creators themselves used it for various classification tasks, including gender recognition Koppel et al. However, as any collection that is harvested automatically, its usability is reduced by a lack of reliable metadata. On re examination, we see a clearly male first name and also profile photo.
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