Answer P.139

A
1. Janet Lapp, who is a psychologist , researched a study. There are thirty people who have migraine headache. All of them were treated by similar medication. One group listened to their favorite music, another ones used relaxation, the others did neither. It proved this remedy has good effort. After a year, the number of patients became one-sixth as before. Lapp thought it can be very help for migraine headaches.

2. In Michael Thaut's study, he make a experiment. He tested ten stroke victims to see how music influence them to walk smoothly. First time, he measured the timing of thir walk without timing. Secondly,  he test again but played music. He found a important improvement when them walked with music. The timing of the stride improved a lot with music.