Duarte Fabiola, Figueroa Tonatiuh, Lemus Luis
Neurociencia Cognitiva, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México.
Neurociencia Cognitiva, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México;
J Vis Exp. 2018 Nov 9(141). doi: 10.3791/58408.
We provide a procedure for a psychophysics experiment in humans based on a previously described paradigm aimed to characterize the perceptual duration of intervals within the range of milliseconds of visual, acoustic, and audiovisual aperiodic trains of six pulses. In this task, each of the trials consists of two consecutive intramodal intervals where the participants press the upward arrow key to report that the second stimulus lasted longer than the reference, or the downward arrow key to indicate otherwise. The analysis of the behavior results in psychometric functions of the probability of estimating the comparison stimulus to be longer than the reference, as a function of the comparison intervals. In conclusion, we advance a way of implementing standard programming software to create visual, acoustic, and audiovisual stimuli, and to generate a two-interval forced-choice (2IFC) task by delivering stimuli through noise-blocking headphones and a computer's monitor.
我们基于先前描述的范式，提供了一种用于人类心理物理学实验的程序，旨在表征视觉、听觉以及视听非周期性六个脉冲序列在毫秒范围内的间隔的感知持续时间。在这个任务中，每个试验由两个连续的模态内间隔组成，参与者按下向上箭头键表示第二个刺激比参考刺激持续时间长，按下向下箭头键则表示相反情况。对行为的分析得出心理测量函数，即估计比较刺激比参考刺激长的概率作为比较间隔的函数。总之，我们提出了一种实现标准编程软件的方法，以创建视觉、听觉和视听刺激，并通过隔音耳机和计算机显示器传递刺激来生成双间隔强制选择（2IFC）任务。
