Among the patients in the task-oriented training group, 12 sessions were given routinely, 3 days a week, for 4 weeks. Task-oriented training consisted of 25 different stations in total, including 9 different gaze stabilization training, 7 balance training, and 9 gait training stations. Gaze stabilization exercises included head-fixed right-left eye movements, head-fixed up-down eye movements, eye fixed right-left head movements, eye fixed up-down head movements, head and eye opposing movements (right-left/ up-down), saccadic and pursuit eye movements (right-left/ up-down). Balance and gait training included these exercises: rolling on the mat, vertical rotation, spinning on a rotary disc, standing on balance bord, jumping, playing dart, reaching, walking forward, walking with head movements (right-left/ up-down), tandem walking, '8' shape walking, walking by picking something up from the ground, walking over an obstacle, walking on treadmill, climbing and descending stairs.

Among the patients in the control group with peripheral vestibular disorders, 12 sessions were given routinely, 3 days a week, for 4 weeks. They were asked to perform gaze stabilization exercises for 1 min. Gaze stabilization exercises consist of head-fixed right-left eye movements, head-fixed up-down eye movements, eye fixed right-left head movements, and eye fixed up-down head movements.

Task-oriented training is defined as an approach based on movement science and motor learning, where the patient "makes functional movements specific to a certain task and receives feedback". Task-oriented training focuses on improving performance on functional tasks through targeted practice and repetition.

The posturography evaluation was made using the Synapsis Posturography System® (SPS®, version 3.0). All patients performed the Sensory Organization Test (SOT), this test representing the association between static and sway-referenced support in posturography under three conditions - eyes open (eo), eyes closed (ec), mislead vision. SOT objectively analyses the three sensory systems that contribute to postural control: somatosensory, visual and vestibular, by systematically eliminating useful visual or support information, creating also sensory conflict situations. We registered the results obtained under six conditions: eyes open, eyes closed and looking sway-referenced screen on static surface and sway-referenced surface. The feet position of the patient on the platform was - 2 cm spacing apart of the heels and a 30º angle between, corresponding to the foot size. Each test was performed barefoot, in standing position, 2 trials of 20 seconds for each test.

The gait speed was assessed by G-walk® spatio-temporal gait analysis system. The assessment began with the participant standing still in an orthostatic standing position. The position had to be maintained for a few seconds until the end of the stabilization of the G-Walk device. The participants were instructed to walk on a 8 meter track. The boundaries of the track were marked to ensure a correct analysis. The participants walked at their natural speed along an absolutely straight path. A successful trial was characterized by the participant completing the 8-meter track and returning to the starting point. The parameter that were evaluated using the G-Walk were; speed (meter/seconds).This parameter are recorded by G-walk and transferred to the computer.

The cadence was assessed by G-walk® spatio-temporal gait analysis system. The gait assessments began with the standing position. The position had to be maintained for a few seconds until the end of the stabilization of the G-Walk device. On an 8 meter track, the participants were asked to walk. For a proper examination, the track's limits were delineated. The participants followed a perfectly straight line while moving at their usual pace. The participant's completion of the 8-meter track and arrival back at the starting point defined a successful trial. Cadence was the parameter that was assessed using the G-Walk.This parameter is sent to the computer after being recorded by G-walk.

In order to evaluate the severity of vertigo and dizziness, the patients were shown a 12.5×17.5 cm Visual analog scale (VAS) card in which the expressions were written in 36 points. VAS was used to determine the severity of vertigo and dizziness. Patients were asked to rate 1=no vertigo/dizziness, 2-3=mild, 4-5=moderate, 6-7=severe, 8-9=very severe, and 10=extreme.

In order to evaluate the frequency of vertigo and dizziness in the last 7 days, a 13×18 cm VAS scale card in which the expressions were written in 36 points was used. Patients were asked to rate; 1= no vertigo/dizziness, 2-3= 1-5 times a week, 4-5= 1-3 times a day, 6-7= 4-10 times a day, 8-9= >10 times a day, 10= continuous vertigo.