Kalogeropoulou Zampeta, Rolfs Martin
Department of Psychology, Humbolt-Universität zu Berlin, Berlin, GermanyBernstein Center for Computational Neuroscience, Berlin, Germany.
Department of Psychology, Humboldt-Universität zu Berlin, Berlin, GermanyBernstein Center for Computational Neuroscience, Berlin, Germany.
J Vis. 2017 Jul 1;17(8):4. doi: 10.1167/17.8.4.
The tight link of saccades to covert spatial attention has been firmly established, yet their relation to other forms of visual selection remains poorly understood. Here we studied the temporal dynamics of feature-based attention (FBA) during fixation and across saccades. Participants reported the orientation (on a continuous scale) of one of two sets of spatially interspersed Gabors (black or white). We tested performance at different intervals between the onset of a colored cue (black or white, indicating which stimulus was the most probable target; red: neutral condition) and the stimulus. FBA built up after cue onset: Benefits (errors for valid vs. neutral cues), costs (invalid vs. neutral), and the overall cueing effect (valid vs. invalid) increased with the cue-stimulus interval. Critically, we also tested visual performance at different intervals after a saccade, when FBA had been fully deployed before saccade initiation. Cueing effects were evident immediately after the saccade and were predicted most accurately and most precisely by fully deployed FBA, indicating that FBA was continuous throughout saccades. Finally, a decomposition of orientation reports into target reports and random guesses confirmed continuity of report precision and guess rates across the saccade. We discuss the role of FBA in perceptual continuity across saccades.
扫视与隐蔽空间注意之间的紧密联系已得到确凿证实,然而它们与其他形式视觉选择的关系仍知之甚少。在此,我们研究了注视期间以及扫视过程中基于特征的注意(FBA)的时间动态。参与者报告两组空间上相互穿插的 Gabors 图形(黑色或白色)中一组的方向(在连续尺度上)。我们测试了在彩色提示(黑色或白色,指示哪个刺激最有可能是目标;红色:中性条件)出现与刺激之间不同时间间隔下的表现。提示出现后 FBA 逐渐增强:益处(有效提示与中性提示相比的错误率)、代价(无效提示与中性提示相比)以及整体提示效应(有效提示与无效提示相比)随着提示 - 刺激间隔增加。关键的是,我们还测试了扫视后不同时间间隔下的视觉表现,此时 FBA 在扫视开始前已完全展开。扫视后立即出现提示效应,并且完全展开的 FBA 对其预测最为准确和精确,这表明 FBA 在整个扫视过程中是连续的。最后,将方向报告分解为目标报告和随机猜测,证实了扫视过程中报告精度和猜测率的连续性。我们讨论了 FBA 在扫视过程中感知连续性中的作用。