such lexica has emerged (Emerson and Declerck, 2014;Altrabsheh et al., 2017), borrowing ideas from crowdsourcing (Raykar et al., 2010;Hovy et al., 2013).
this is a non-trivial task, because lexica can use binary, categorical, or continuous scales to quantify polarity-in addition to different interpretations for each-and thus cannot easily be combined.