Criterion-free pattern and flicker thresholds.
Criterion-free pattern and flicker thresholds.
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DOI：
10.1364/josa.71.001343
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发表时间：
1981-11
影响因子：
--
通讯作者：
C. A. Burbeck
中科院分区：
文献类型：
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作者：
C. A. Burbeck
先前对人类模式和闪烁阈值的测量使用了心理物理调整方法，并要求受试者改变标准。我们的新方法通过一种无标准的程序来测量模式和闪烁阈值，该程序要求受试者将测试刺激与控制刺激区分开来，而控制刺激仅在一个维度上与测试不同，即模式实验中的空间维度和闪烁实验中的时间维度。通过使用这种技术，我们发现除了那些具有极低空间频率和中高时间频率（取决于受试者）的闪烁光栅外，受试者的模式灵敏度等于或大于其闪烁灵敏度。此外，时空相互作用在模式和闪烁数据中都很明显。这些结果与平差法得到的结果有很大的不同。
Previous measurements of pattern and flicker thresholds in man have used the psychophysical method of adjustment and have required that the subject change criteria. Our new approach measures pattern and flicker thresholds by a criterion-free procedure that requires that the subject distinguish a test stimulus from control stimuli that differ from the test in only one dimension, the spatial dimension in the pattern experiments and the temporal dimension in the flicker experiments. By using this technique, we find that the subject's pattern sensitivity is equal to or greater than his flicker sensitivity for all flickering gratings except those that have extremely low spatial and moderate or high temporal frequencies (depending on the subjects). Furthermore, spatiotemporal interaction is evident in both the pattern and the flicker data. These results differ substantially from those obtained by the method of adjustment.