Neider Mark B, Zelinsky Gregory J
Department of Psychology, State University of New York at Stony Brook, USA.
Vision Res. 2006 Mar;46(5):614-21. doi: 10.1016/j.visres.2005.08.025. Epub 2005 Oct 17.
How does scene context guide search behavior to likely target locations? We had observers search for scene-constrained and scene-unconstrained targets, and found that scene-constrained targets were detected faster and with fewer eye movements. Observers also directed more initial saccades to target-consistent scene regions and devoted more time to searching these regions. However, final checking fixations on target-inconsistent regions were common in target-absent trials, suggesting that scene context does not strictly confine search to likely target locations. We interpret these data as evidence for a rapid top-down biasing of search behavior by scene context to the target-consistent regions of a scene.
场景上下文如何引导搜索行为指向可能的目标位置？我们让观察者搜索受场景约束和不受场景约束的目标，发现受场景约束的目标被检测得更快，且眼动次数更少。观察者还会将更多的初始扫视指向与目标一致的场景区域，并投入更多时间搜索这些区域。然而，在目标不存在的试验中，对与目标不一致区域的最终检查注视很常见，这表明场景上下文并没有严格将搜索限制在可能的目标位置。我们将这些数据解释为场景上下文对搜索行为进行快速自上而下偏向到场景中与目标一致区域的证据。
