DeLucia Patricia, Kaiser Mary, Bush Jason, Meyer Les, Sweet Barbara
Texas Tech University, Department of Psychology, Lubbock, TX 79409-2051, USA.
Q J Exp Psychol A. 2003 Oct;56(7):1165-89. doi: 10.1080/02724980343000053.
Time to contact (TTC) is specified optically by tau, and studies suggest that observers are sensitive to this information. However, TTC judgements also are influenced by other sources of information, including pictorial depth cues. Therefore, it is useful to identify these sources of information and to determine whether and how their effects combine when multiple sources are available. We evaluated the effect of five depth cues on TTC judgements. Results indicate that relative size, height in field, occlusion, and motion parallax influence TTC judgements. When multiple cues are available, an integration (rather than selection) strategy is used. Finally, the combined effects of multiple cues are not always consistent with a strict additive model and may be task dependent.
接触时间（TTC）通过光信号由τ来确定，研究表明观察者对该信息很敏感。然而，TTC判断也会受到其他信息来源的影响，包括图像深度线索。因此，识别这些信息来源，并确定当有多个信息源时它们的影响是否以及如何结合是很有用的。我们评估了五种深度线索对TTC判断的影响。结果表明，相对大小、视野中的高度、遮挡和运动视差会影响TTC判断。当有多个线索可用时，会采用整合（而非选择）策略。最后，多个线索的综合影响并不总是与严格的加法模型一致，并且可能取决于任务。
