Localization of a time-delayed, monocular virtual object superimposed on areal environment

Observers adjusted a pointer to match the depicted distance of a monocular virtual object viewed in a see-through, head-mounted display. Distance info rmation was available through motion parallax produced as the observers roc ked side to side. The apparent stability of the virtual object was impaired by a time delay between the observers' head motions and the corresponding change in the object position on the display. Localizations were made for f our time delays (31 ms, 64 ms, 131 ms, and 197 ms) and three depicted dista nces (75 cm, 95 cm, and 113 cm). The errors in localizations increased syst ematically with time delay and depicted distance. A model of the results sh ows that the judgment error and lateral projected position of the virtual o bject are each linearly related to time delay.