Palmisano Stephen, Davies Rodney G, Brooks Kevin R
School of Psychology, Faculty of Social Sciences, University of Wollongong, Wollongong, NSW, 2522, Australia.
Department of Psychology and Perception and Action Research Centre, Faculty of Human Sciences, Macquarie University, Sydney, NSW, Australia.
Atten Percept Psychophys. 2019 Jan;81(1):281-295. doi: 10.3758/s13414-018-1609-5.
Research has previously shown that adding consistent stereoscopic information to self-motion displays can improve the vection in depth induced in physically stationary observers. In some past studies, the simulated eye-separation was always close to the observer's actual eye-separation, as the aim was to examine vection under ecological viewing conditions that provided consistent binocular and monocular self-motion information. The present study investigated whether large discrepancies between the observer's simulated and physical eye-separations would alter the vection-inducing potential of stereoscopic optic flow (either helping, hindering, or preventing the induction of vection). Our self-motion displays simulated eye-separations of 0 cm (the non-stereoscopic control), 3.25 cm (reduced from normal), 6.5 cm (approximately normal), and 13 cm (exaggerated relative to normal). The rated strength of vection in depth was found to increase systematically with the simulated eye-separation. While vection was the strongest in the 13-cm condition (stronger than even the 6.5-cm condition), the 3.25-cm condition still produced superior vection to the 0-cm control (i.e., it had significantly stronger vection ratings and shorter onset latencies). Perceptions of scene depth and object motion-in-depth speed were also found to increase with the simulated eye-separation. As expected based on the findings of previous studies, correlational analyses suggested that the stereoscopic advantage for vection (found for all of our non-zero eye-separation conditions) was due to the increase in perceived motion-in-depth.
先前的研究表明，在自我运动显示中添加一致的立体信息可以增强物理静止观察者所产生的深度运动错觉。在过去的一些研究中，模拟的眼间距总是接近观察者的实际眼间距，因为目的是在提供一致的双眼和单眼自我运动信息的生态观察条件下研究运动错觉。本研究调查了观察者模拟的眼间距与实际眼间距之间的巨大差异是否会改变立体视觉流的运动错觉诱导潜力（无论是促进、阻碍还是防止运动错觉的诱导）。我们的自我运动显示模拟了0厘米（非立体控制组）、3.25厘米（低于正常）、6.5厘米（大致正常）和13厘米（相对于正常而言被夸大）的眼间距。结果发现，深度运动错觉的评定强度随着模拟眼间距的增加而系统性增加。虽然在13厘米条件下运动错觉最强（甚至比6.5厘米条件下还要强），但3.25厘米条件下产生的运动错觉仍优于0厘米控制组（即，其运动错觉评定更强，起始潜伏期更短）。还发现，对场景深度和物体深度运动速度的感知也随着模拟眼间距的增加而增加。基于先前研究的结果，相关性分析表明，运动错觉的立体优势（在我们所有非零眼间距条件下均有发现）是由于深度运动感知的增加。
