There are many various techniques used in group therapy.
I've invented a new one. It's Musical group therapy.
The procedure is following: all group participants enter a big hall with various musical instruments put on shelves - there should be harmonica, flute, cello, violin, clarinet, accordion, doublebass, tam-tam drums, tambourine, harp, tuba, trumpet etc. Each participant can try any instruments and choose the one he/she would like the most, only it's disallowed to choose the instrument one can skillfully play.
As long as the choice would be based on the extent one likes the instrument's sound it can be concluded what the participant's actual emotional state is. Those choosing wistful harmonicas, bassoons, doublebasses and cellos are likely to be lacking emotional tonus, those preferring light-hearted tambourines, mandolines, cymbals or saxophones are presumably more optimistic.
After each participant chooses an instrument one should explain his/her