Department of Psychology, Peking University, 5 Yiheyuan Road, Beijing 100871, PR China.
Neurosci Lett. 2013 Feb 8;534:7-11. doi: 10.1016/j.neulet.2012.11.046. Epub 2012 Dec 5.
Neurobiological and psychophysical evidence indicates a functional subdivision of the human visual field with a border at approximately 10-15° eccentricity. Recent support for this inhomogeneity comes from an attention study on inhibition of return (IOR), which shows a much stronger IOR effect in the periphery relative to the perifoveal visual field (Bao & Pöppel [1]). Is this inhomogeneity of the visual field also reflected in the temporal dynamics of IOR? To answer this question, we examined when IOR effects disappear at the two functional regions of the visual field. Consistent with previous observations, IOR is much stronger in the periphery relative to the perifoveal visual field, but the two decay functions reach threshold at approximately the same time. This observation suggests a common temporal control window for IOR in both perifoveal and peripheral visual fields.
神经生物学和心理物理学证据表明，人类视野具有功能上的细分，边界大约在 10-15°的偏心率处。最近的一项关于返回抑制 (IOR) 的注意力研究为这种非均匀性提供了支持，该研究表明，相对于中央凹视野，外周的 IOR 效应要强得多 (Bao & Pöppel [1])。这种视野的非均匀性是否也反映在 IOR 的时间动态中？为了回答这个问题，我们研究了 IOR 效应在视野的两个功能区域何时消失。与之前的观察结果一致，相对于中央凹视野，外周的 IOR 效应要强得多，但这两个衰减函数达到阈值的时间大致相同。这一观察结果表明，IOR 在中央凹和外周视野中都有共同的时间控制窗口。
