5-point scale average value

Verbal expression

Fuzzy number

Membership function

Below 2.09

Not at all (1)

(1, 1, 3)

2.10 - 2.89

Slightly (2)

(1, 3, 5)

2.90 - 3.69

Moderately (3)

(3, 5, 7)

3.70 - 4.49

Strongly (4)

(5, 7, 9)

Above 4.5

Intensely so (5)

(7, 9, 9)