Intervention: Participants allocated in both control and experimental groups were receiving treatment for their specific vestibular disorders. Patients assigned to the experimental group also performed the Cawthorne and Cooksey exercises for vestibular rehabilitation during a six week of treatment period.

intervention: The control group will not perform the active exercise that will be applied to intervention group.

Experimental: intervention group. Patients assigned to the experimental group will perform the Cawthorne and Cooksey exercises for vestibular rehabilitation in addition to their habitual treatment.

Activities-specific Balance Confidence scale (ABC), to quantify the level of confidence in performing a specific task without losing balance or becoming unsteady. This scale is applied to assess the change due to intervention between the baseline and 6 weeks of treatment. So the data will be collected at baseline and after 6 weeks of treatment.

UCLA Dizziness Questionnaire (UCLA-DQ), used to measure the severity and frequency of dizziness and its impact on quality of life. This questionnaire is applied to assess the change due to intervention between the baseline and 6 weeks of treatment. So the data will be collected at baseline and after 6 weeks of treatment.