Yi Linlin
Department of Psychology, Brown University, Providence, RI 02912, USA.
Behav Processes. 2009 Jun;81(2):274-9. doi: 10.1016/j.beproc.2008.10.004. Epub 2008 Oct 22.
This study examined two possible psychophysical time scales, a logarithmic representation of time with constant variability and a linear representation of time with scalar variability. Twenty-four rats were tested on a modified temporal bisection procedure in which multiple responses could occur in a 10-s time window after the termination of a stimulus. The number of "long" or "short" responses was used as a measure of the rats' certainty of the duration of the presented interval. Data were analyzed with signal detection theory, and straight lines were fit to the zROC curves with the assumptions of a logarithmic representation of time with constant variability and a linear representation of time with scalar variability. The logarithmic representation of time with constant variability provided a better fit to the data than the linear representation of time with scalar variability.
本研究考察了两种可能的心理物理时间尺度，一种是具有恒定变异性的时间对数表示，另一种是具有标量变异性的时间线性表示。对24只大鼠进行了改良的时间二等分程序测试，在刺激终止后的10秒时间窗口内可能会出现多次反应。“长”或“短”反应的数量被用作衡量大鼠对呈现间隔持续时间确定性的指标。用信号检测理论分析数据，并根据具有恒定变异性的时间对数表示和具有标量变异性的时间线性表示的假设，将直线拟合到zROC曲线。与具有标量变异性的时间线性表示相比，具有恒定变异性的时间对数表示对数据的拟合更好。
