Mates J
Max Planck Institute for Psychological Research, Munich, Germany.
Biol Cybern. 1994;70(5):475-84. doi: 10.1007/BF00203240.
In Part I (Mates 1994), a linear model of timing and error-corrections was constructed that aims at an explanation of the mechanisms underlying a subject's performance in an experimental paradigm, in which the task is to synchronize a sequence of motor acts to a sequence of stimuli. The model consists of two error-corrective mechanisms: (1) corrections of period (inverted frequency) of the sequence of responses; (2) corrections of phase shift of that sequence (synchronization error). In this paper, the influence of the physiologically justifiable model variables and of initial conditions on the steady-state response sequence as well as the stability of performance of the model are analyzed. The model is stable for error-correction gains in the range from 0 to 2. Comparison with known empirical data supports the assumption that reasonable values are less than 1. Furthermore, an alternative to the basic linear model is introduced in which the possible character of the process of subjective acquisition of the synchronization error is discussed. On the basis of findings from other experimental paradigms (fusion and order threshold) it can be assumed that the subjective estimate is a nonlinear function of the difference between the temporal central availability of internal representations of the stimulus and response-feedback events. Some other known synchronization data are simulated by the nonlinear modification of the model in this paper. A good fit of the simulation results achieved further justifies the model structure proposed. Finally, the possible effect of the subjective synchronization-error estimation on empirical data is discussed.
在第一部分（梅茨，1994年）中，构建了一个关于时间安排和误差校正的线性模型，其目的是解释受试者在一种实验范式中的表现背后的机制，在该范式中，任务是将一系列运动行为与一系列刺激同步。该模型由两种误差校正机制组成：（1）对反应序列的周期（倒数频率）进行校正；（2）对该序列的相移（同步误差）进行校正。在本文中，分析了生理学上合理的模型变量和初始条件对稳态反应序列的影响以及模型表现的稳定性。该模型在误差校正增益范围从0到2时是稳定的。与已知经验数据的比较支持了合理值小于1的假设。此外，引入了基本线性模型的一种替代模型，其中讨论了同步误差主观获取过程的可能特征。基于其他实验范式（融合和顺序阈值）的发现，可以假设主观估计是刺激和反应反馈事件的内部表征的时间中心可用性之间差异的非线性函数。本文通过对模型的非线性修改模拟了一些其他已知的同步数据。模拟结果的良好拟合进一步证明了所提出的模型结构的合理性。最后，讨论了主观同步误差估计对经验数据的可能影响。
