निम्नलिखित में से कौन सी अभिवृत्ति मापन (Attitude scaling) विधि थर्स्टन (Thurstone) द्वारा प्रस्तावित की गई थी?

The attitude scaling technique developed by Rensis Likert was later designated by Charles Bird as the:

A large panel of judges is required during the construction of which scaling technique?