Guttman Scales and Thurstone Scales Differ in Which of the Following

Multiple Choice

Guttman scales and Thurstone scales differ in which of the following ways? (circle all that apply)

A) Thurstone scales uses dichotomous response options, while Guttman scales use ordinal response options
B) the items endorsed on Guttman scales are averaged while in Thurstone scales they are not
C) the items in Thurstone scales are averaged while in Guttman scales they are not
D) in Guttman scales, respondents with a moderately extreme attitude would be expected to endorse the "moderately extreme" item, as well as all less extreme items; in Thurstone scales, respondents with a moderately extreme attitude would be expected to endorse the predetermined "moderately extreme" item and none others