The Pittsburgh scales of Social Extraversion-Introversion and Emotionalityhttps://www.upress.umn.edu/test-division/bibliography/1960-1969/1962/bendig_pittsburgh_1962https://www.upress.umn.edu/logo.png
A.W. Bendig
(1962)
The Pittsburgh scales of Social Extraversion-Introversion and Emotionality