By examining sentiment compositions of negators and arguments, we model the quantitative behavior of negators in changing sentiment.
given a negated phrase (e.g., isn't very good) and the sentiment score of its argument (e.g., s("very good ′′ ) = 0.5), we focus on understanding the negator's quantitative behavior in yielding the sentiment score of the negated phrase s("isn ′ t very good ′′ ).