A display apparatus, a vehicle, and a display method are disclosed, which recognize the user's intention by recognizing the user's eyes, and apply the recognized result to a device control process, thereby greatly increasing convenience of the input unit manipulation actions of the user. A display apparatus includes: a controller configured to insert a visual stimulus signal into basic visual information according to a predetermined frequency; a display unit configured to display the visual stimulus signal for generating an electroencephalogram (EEG) signal and the basic visual information; and an EEG analyzer configured to determine a frequency occupied by the generated EEG signal.