Kersten [Vision Res. 27, 1029 (1987)] reported that absolute efficiency for the detection of static, one-dimensional bandpass noise was high and approximately constant for stimulus bandwidths ranging from 1 to 6 octaves. This result implies that human observers integrated information efficiently across a wide range of spatial frequency. One interpretation of this result--and similar results obtained with auditory stimuli [J. Acoust. Soc. Am. 32, 121 (1960)]--is that human observers, like ideal observers, can detect stimuli using an internal filter that has an adjustable bandwidth. The current experiments replicate Kersten's findings, extend them to the case where observers are uncertain about stimulus bandwidth, and use the classification image technique to estimate the filter used to detect noise stimuli that differ in bandwidth. Our results suggest that observers do not adjust channel bandwidth to match the stimulus and that detection thresholds are consistent with the predictions of a multiple-channel model.
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机译：Kersten [Vision Res。 27，1029（1987）]报告说，检测静态一维带通噪声的绝对效率很高，并且对于1到6个八度的激励带宽几乎是恒定的。该结果表明，人类观察者可以在广泛的空间频率范围内有效地集成信息。对这一结果的一种解释-以及通过听觉刺激获得的类似结果[J. co Soc。上午。 32，121（1960）]-人类的观察者，就像理想的观察者一样，可以使用带宽可调的内部滤波器来检测刺激。当前的实验复制了Kersten的发现，将其扩展到观察者不确定刺激带宽的情况，并使用分类图像技术来估计用于检测带宽不同的噪声刺激的滤波器。我们的结果表明，观察者不会调整通道带宽以匹配刺激，并且检测阈值与多通道模型的预测一致。
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