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首页> 外文期刊>The Journal of the Acoustical Society of America >A maximum-likelihood procedure for estimating psychometric functions: Thresholds, slopes, and lapses of attention
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A maximum-likelihood procedure for estimating psychometric functions: Thresholds, slopes, and lapses of attention

机译:估计心理功能的最大似然程序:阈值,斜率和注意力下降

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摘要

Green [J. Acoust. Soc. Am. 87, 2662-2674 (1990)] suggested an efficient, maximum-likelihood-based approach for adaptively estimating thresholds. Such procedures determine the signal strength on each trial by first identifying the most likely psychometric functions among the pre-proposed alternatives based on responses from previous trials, and then finding the signal strength at the sweet point on that most likely function. The sweet point is the point on the psychometric function that is associated with the minimum expected variance. Here, that procedure is extended to reduce poor estimates that result from lapses in attention. The sweet points for the threshold, slope, and lapse parameters of a transformed logistic psychometric function are derived. In addition, alternative stimulus placement algorithms are considered. The result is a relatively fast and robust estimation of a three-parameter psychometric function.
机译:绿色[J. co Soc。上午。 [J.Am.Chem.Soc.87,2662-2674(1990)]提出了一种有效的,基于最大似然性的方法来自适应地估计阈值。这样的程序通过首先根据先前试验的响应在预定方案中确定最可能的心理测验功能,然后在该最可能函数的最佳点找到信号强度,从而确定每个试验的信号强度。最佳点是心理测度函数上与最小预期方差相关的点。在这里,该程序得到了扩展,以减少由于注意力不集中而导致的不良估计。得出了转换后的对数心理测度函数的阈值,斜率和失效参数的最佳点。另外,考虑了替代刺激放置算法。结果是对三参数心理测验函数的相对快速和可靠的估计。

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