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首页> 外文期刊>Current Biology: CB >Dynamic Interplay of Value and Sensory Information in High-Speed Decision Making
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Dynamic Interplay of Value and Sensory Information in High-Speed Decision Making

机译：高速决策中价值和感官信息的动态相互作用

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In dynamic environments, split-second sensorimotor decisions must be prioritized according to potential payoffs to maximize overall rewards. The impact of relative value on deliberative perceptual judgments has been examined extensively [1-6], but relatively little is known about value-biasing mechanisms in the common situation where physical evidence is strong but the time to act is severely limited. In prominent decision models, a noisy but statistically stationary representation of sensory evidence is integrated over time to an action-triggering bound, and value-biases are affected by starting the integrator closer to the more valuable bound. Here, we show significant departures from this account for humans making rapid sensory-instructed action choices. Behavior was best explained by a simple model in which the evidence representation-and hence, rate of accumulation-is itself biased by value and is non-stationary, increasing over the short decision time frame. Because the value bias initially dominates, the model uniquely predicts a dynamic "turn-around'' effect on low-value cues, where the accumulator first launches toward the incorrect action but is then re-routed to the correct one. This was clearly exhibited in electrophysiological signals reflecting motor preparation and evidence accumulation. Finally, we construct an extended model that implements this dynamic effect through plausible sensory neural response modulations and demonstrate the correspondence between decision signal dynamics simulated from a behavioral fit of that model and the empirical decision signals. Our findings suggest that value and sensory information can exert simultaneous and dynamically countervailing influences on the trajectory of the accumulation-to-bound process, driving rapid, sensory-guided actions.
机译：在动态环境中，必须根据潜在的回报优先考虑秒第二感觉电流决策，以最大限度地提高整体奖励。相对价值对审议感知判断的影响已被广泛研究[1-6]，但相对较少地了解有价值的偏置机制，在常识中，有实际证据强的常见情况，但行动时间严重限制。在突出的决策模型中，随着时间的推移触发绑定的嘈杂但统计上静止表示感官证据的噪声，并且通过启动Integrator更靠近更有价值的界限来影响值偏差。在这里，我们从这个账户中显示出大量的偏离人类，以便进行快速感官指示的行动选择。行为是最好的一种简单模型来解释，其中证据表示 - 并因此，积累率 - 本身偏置值并非静止，在短期决策时间范围内增加。因为价值偏置最初占主导地位，所以模型唯一地预测了对低值线索的动态“转向”的影响，其中累加器首先向不正确的动作发射，然后将其重新路由到正确的动作。这显然表现出来在电生理信号中反映运动准备和证据积累。最后，我们通过合理的感官神经响应调制构建一种实现这种动态效果的扩展模型，并展示了从该模型的行为拟合模拟的决策信号动态与经验决策信号之间的对应关系。我们的研究结果表明，价值和感官信息可以对积累到束过程的轨迹同时和动态反补贴影响，驾驶快速，感官引导的动作。

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