Correlation Coefficients for Hesitant Fuzzy Linguistic Term Sets

Here are many situations in real applications of decision making where we deal with uncertain conditions. Due to the different sources of uncertainty, since its original denition of fuzzy sets in 1965 [45], different generaliza- tions and extensions of fuzzy sets have been introduced: Type-2 fuzzy sets [11, 39], Intuitionistic fuzzy sets [1], fuzzy multi-sets [44] and etc. However, in such cases, it is suitable for experts to provide their preferences or assessments by using linguistic information rather than quantitative values.