To study the development of responsiveness to binocular information, a display specifying an object approaching on a collision course was presented to 12 14- and 12 20-wk-old infants. Responses to the stereoscopic collision display were compared to behavior evoked by a control display that lacked stereoscopic depth information. Videotape recordings were analyzed for evidence of convergence, avoidance behavior, and reaching. The head alignment of both the 14- and 20-wk-olds suggests that their eyes were converging on the stereoscopic display. However, only the 20-wk-old Ss reached for the virtual object as it approached and reacted with defensive behavior at the time of collision, indicating sensitivity to binocular depth information. (15 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved).
- stereoscopic collision display vs display lacking stereoscopic depth information, development of sensitivity to binocular information for approach of object, 14 & 20 wk olds