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Transsaccadic integration is dominated by early, independent noise

机译：Transsaccadic集成是由早期的独立噪声主导

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Humans are able to integrate pre- and postsaccadic percepts of an object across saccades to maintain perceptual stability. Previous studies have used Maximum Likelihood Estimation (MLE) to determine that integration occurs in a near-optimal manner. Here, we compared three different models to investigate the mechanism of integration in more detail: an early noise model, where noise is added to the pre- and postsaccadic signals before integration occurs; a late-noise model, where noise is added to the integrated signal after integration occurs; and a temporal summation model, where integration benefits arise from the longer transsaccadic presentation duration compared to pre- and postsaccadic presentation only. We also measured spatiotemporal aspects of integration to determine whether integration can occur for very brief stimulus durations, across two hemifields, and in spatiotopic and retinotopic coordinates. Pre-, post-, and transsaccadic performance was measured at different stimulus presentation durations, both at the saccade target and a location where the pre- and postsaccadic stimuli were presented in different hemifields across the saccade. Results showed that for both within- and between-hemifields conditions, integration could occur when pre- and postsaccadic stimuli were presented only briefly, and that the pattern of integration followed an early noise model. Whereas integration occurred when the pre- and post-saccadic stimuli were presented in the same spatiotopic coordinates, there was no integration when they were presented in the same retinotopic coordinates. This contrast suggests that transsaccadic integration is limited by early, independent, sensory noise acting separately on pre- and postsaccadic signals.
机译：人类能够对象的前和postsaccadic知觉整合跨扫视保持感性的稳定性。以前的研究已经使用最大似然估计（MLE），以确定整合发生在接近最佳的方式。在这里，我们比较了三种不同的模型，研究一体化的详细机制：早期的噪声模型，其中融合发生之前的噪声被添加到前和postsaccadic信号;后期噪声模型，其中积分后发生噪声被添加到积分信号;和时间总和模型，其中集成优势从较长transsaccadic展现持续出现相比，只有前和postsaccadic演示。我们还测量一体化的时空方面，以确定是否可以发生整合非常短暂刺激的持续时间，在两个hemifields，并在spatiotopic和视皮层坐标。预，后，和transsaccadic性能在不同刺激呈现的持续时间在其中前和postsaccadic刺激是在跨越不同扫视呈现hemifields扫视靶和位置处测量，这两者。结果表明，无论对于内和hemifields之间的条件，可以在产前和postsaccadic刺激已提交只是简单地发生整合，而整合的模式，随后的早期噪声模型。而发生融合时前和后扫视刺激在同spatiotopic坐标已提交，有当他们在同一个初级视坐标是没有提出整合。这一对比表明，transsaccadic集成是通过早期的，独立的，感觉噪声前和postsaccadic信号分别作用的限制。

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