After a ride on a very frightening roller coaster with helga, manfred's heart was beating fast, his hands were sweating, and his knees were trembling; when he looked at helga after the ride was over he concluded that he must be falling in love with her. manfred's emotional experience can best be explained by the:

Manfred's emotional experience can best be explained by the two-factor theory of emotion. According this theory physiological arousal and cognitive label are the two factors on which emotion is based.
This theory was created by researchers Stanley Schachter and Jerome E. Singer. In this case the fact that Manfred's heart was beating fast, his hands were sweating, and his knees were trembling is factor 1-physiological arousal and the fact that he looked at Helga after the ride is factor 2.