Consistent implementation of decisions in the brain.
Consistent implementation of decisions in the brain.
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DOI：
10.1371/journal.pone.0043443
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Gilchrist ID
中科院分区：
文献类型：
--
作者：
Marshall JA;Bogacz R;Gilchrist ID
尽管决策过程的复杂性和可变性，运动反应通常是刻板的和独立的决策难度。这种一致性是如何实现的？通过一个工程类比，我们考虑如何以及为什么一个系统应该被设计为不仅实现灵活的决策，但也一致的决策实施。我们特别考虑了神经生物学上合理的决策累积模型，其中当达到决策阈值时就会做出决策。为了在这些模型中的决策的速度和准确性之间进行权衡，可以调整阈值本身，或者等效地，固定阈值并调整基线激活。在这里，我们回顾如何在这样的模型中实现这种等价。然后，我们认为，操纵基线激活是可取的，因为它实现了一致的决策执行，确保一致性的电机输入，总结经验证据支持这一假设，并建议它可能是一个一般原则的决策和执行。因此，我们的目标是回顾神经生物学上合理的决策模型如何使用不同的机制来操纵速度-准确性权衡，考虑哪些机制具有更理想的决策执行属性，然后回顾大脑实际使用的机制的相关神经科学数据。
Despite the complexity and variability of decision processes, motor responses are generally stereotypical and independent of decision difficulty. How is this consistency achieved? Through an engineering analogy we consider how and why a system should be designed to realise not only flexible decision-making, but also consistent decision implementation. We specifically consider neurobiologically-plausible accumulator models of decision-making, in which decisions are made when a decision threshold is reached. To trade-off between the speed and accuracy of the decision in these models, one can either adjust the thresholds themselves or, equivalently, fix the thresholds and adjust baseline activation. Here we review how this equivalence can be implemented in such models. We then argue that manipulating baseline activation is preferable as it realises consistent decision implementation by ensuring consistency of motor inputs, summarise empirical evidence in support of this hypothesis, and suggest that it could be a general principle of decision making and implementation. Our goal is therefore to review how neurobiologically-plausible models of decision-making can manipulate speed-accuracy trade-offs using different mechanisms, to consider which of these mechanisms has more desirable decision-implementation properties, and then review the relevant neuroscientific data on which mechanism brains actually use.
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fMRI证明了双重流程在决策中的速度准确性权衡。
影响因子：
3.7
作者：
Ivanoff, Jason;Branning, Philip;Marois, Rene
通讯作者：
Marois, Rene
影响因子：
4.3
作者：
Roxin A;Ledberg A
通讯作者：
Ledberg A
影响因子：
5.4
作者：
Brown, S;Heathcote, A
通讯作者：
Heathcote, A
DOI：
10.1073/pnas.0805903105
发表时间：
2008-11-11
影响因子：
11.1
作者：
Forstmann, Birte U.;Dutilh, Gilles;Wagenmaker, Eric-Jan
通讯作者：
Wagenmaker, Eric-Jan
影响因子：
2.5
作者：
Shadlen, MN;Newsome, WT
通讯作者：
Newsome, WT