The level of self-esteem of hard of hearing children. Can participating in dance lessons with the vibratonal headphones iprove it?

The experiment involved 28 hard of hearing children aged 9–13 years old attending special schools for deaf children in Poland. Two study groups were distinguished: an experimental (E) and a control (C)one. Children from the experimental group participated in two compulsory physical education lessons, and two experimental dance lessons a week for a period of four months. To allow reception of acoustic vibrations of music, vibrational headphones were used, which reinforced the so–called bone conduction of music.
To measure the level of self-esteem, Polish adaptation of The Rosenberg Self-Esteem Scale was used.