Decision processes in temporal discrimination
Decision processes in temporal discrimination
复制标题
DOI：
10.1016/j.actpsy.2014.03.005
复制
发表时间：
2014-06-01
影响因子：
1.8
通讯作者：
Simen, Patrick
中科院分区：
文献类型：
--
作者：
Balci, Fuat;Simen, Patrick
在间隔计时的研究中，时间决策及其生成的响应时间背后的处理动态很少受到关注。相比之下，其他简单形式的决策模型已经使用响应时间进行了广泛的研究，导致时间和非时间决策理论之间的实质性脱节。然而，包含现有非时间决策模型的总体决策理论框架可以同时考虑间隔计时本身和基于时间的决策。我们在时间二分任务中测试的人类时间辨别表现中寻找该框架的证据。在这项任务中，参与者根据他们对两个参考持续时间的感知相似性，回顾性地将经历的刺激持续时间分为短或长，并仅因对这些参考的正确分类而获得奖励。我们对选择比例和响应时间的分析表明，参数化以最大化获得的奖励的两阶段顺序扩散过程可以解释二分性能的显着模式。第一扩散级通过累积内生噪声时钟信号来计时间隔；第二阶段通过积累被内生噪声破坏的第一阶段证据来做出有关第一阶段时间表示的决策。奖励最大化要求第二阶段累积率和起点基于刺激持续时间结束时第一阶段计时器的状态，并且非决策相关延迟的估计应作为刺激持续时间的函数而减少。结果与这些预测一致，因此支持静态嘲笑的漂移扩散模型扩展到间隔计时和时间决策领域。 (C) 2014 Elsevier B.V. 保留所有权利。
The processing dynamics underlying temporal decisions and the response times they generate have received little attention in the study of interval timing. In contrast, models of other simple forms of decision making have been extensively investigated using response times, leading to a substantial disconnect between temporal and non-temporal decision theories. An overarching decision-theoretic framework that encompasses existing, non-temporal decision models may, however, account both for interval timing itself and for time-based decision-making. We sought evidence for this framework in the temporal discrimination performance of humans tested on the temporal bisection task. In this task, participants retrospectively categorized experienced stimulus durations as short or long based on their perceived similarity to two, remembered reference durations and were rewarded only for correct categorization of these references. Our analysis of choice proportions and response times suggests that a two-stage, sequential diffusion process, parameterized to maximize earned rewards, can account for salient patterns of bisection performance. The first diffusion stage times intervals by accumulating an endogenously noisy clock signal; the second stage makes decisions about the first-stage temporal representation by accumulating first-stage evidence corrupted by endogenous noise. Reward-maximization requires that the second-stage accumulation rate and starting point be based on the state of the first-stage timer at the end of the stimulus duration, and that estimates of non-decision-related delays should decrease as a function of stimulus duration. Results are in accord with these predictions and thus support an extension of the drift-diffusion model of static derision making to the domain of interval timing and temporal decisions. (C) 2014 Elsevier B.V. All rights reserved.