Signal detection theory and vestibular perception: II. Fitting perceptual thresholds as a function of frequency.
Signal detection theory and vestibular perception: II. Fitting perceptual thresholds as a function of frequency.
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DOI：
10.1007/s00221-012-3217-2
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发表时间：
2012-10
影响因子：
2
通讯作者：
Merfeld DM
中科院分区：
文献类型：
--
作者：
Lim K;Merfeld DM
前庭感知阈值由动态感觉系统定义。为了捕捉这些动态，阈值先前被拟合为频率的函数。在本文中，我们比较适合使用两个已发表的模型与两个新的模型。此外，一种新的拟合方法，利用前庭感知动力学的开发，以提高拟合质量，并克服与传统的方法相关联的问题。四个模型和两个拟合方法的组合进行了测试，使用模拟数据和以前公布的实验数据。模拟结果表明，传统的方法低估阈值时，在每个频率的试验次数是有限的（约50），这种低估减少了五倍的新的拟合方法，同时利用跨频率的数据。新的拟合方法也取得了最好的拟合优度的模拟和实验数据。事实上，与单独拟合每个频率下的响应然后拟合这些频率上的阈值数据的传统方法相比，跨频率同时拟合的新方法被证明更准确、更精确、更稳健和更有效。已发表的偏航旋转阈值数据的修正拟合表明，在高于0.26 Hz的截止频率（远高于半规管的截止频率（约0.03 Hz））的频率下，这些数据通过一阶高通滤波器进行最佳拟合，该滤波器具有0.5 °/s的平台（大约是运动平台振动的4倍）。这种动态分析表明速度泄漏机制对人类偏航旋转阈值的贡献。
Vestibular perceptual thresholds are defined by a dynamic sensory system. To capture these dynamics, thresholds were previously fit as a function of frequency. In this paper, we compare fits using two published models with two new models. Furthermore, a new fitting method that utilizes vestibular perceptual dynamics is developed to improve fit quality and overcome problems associated with the conventional approach. Combinations of the four models and two fitting methods are tested using both simulated data and previously published experimental data. Simulations reveal that the conventional approach underestimates thresholds when the number of trials at each frequency is limited (circa 50); this underestimation is reduced fivefold by the new fitting method that simultaneously utilizes data across frequencies. The new fitting method also scored best for goodness of fit for both the simulations and experimental data. In fact, the new approach of fitting simultaneously across frequencies proved more accurate, more precise, more robust, and more efficient than the conventional approach of fitting the responses at each frequency individually and then fitting these threshold data across frequency. The revised fit of published yaw rotation threshold data show that these are best fit by a first-order high-pass filter having a plateau of 0.5°/s (roughly a factor of 4 higher than the motion platform vibration) at frequencies above the cut-off frequency of 0.26 Hz, which is well above the cut-off frequency of the semicircular canals (circa 0.03 Hz). This dynamic analysis suggests the contributions of a velocity leakage mechanism to human yaw rotation thresholds.
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DOI：
10.1111/j.1749-6632.1981.tb30888.x
发表时间：
1981-01-01
影响因子：
5.2
作者：
COHEN, B;HENN, V;DENNETT, D
通讯作者：
DENNETT, D
影响因子：
2.5
作者：
GOLDBERG, JM;FERNANDEZ, C
通讯作者：
FERNANDEZ, C
影响因子：
2.5
作者：
Haburcakova, Csilla;Lewis, Richard F.;Merfeld, Daniel M.
通讯作者：
Merfeld, Daniel M.
影响因子：
2.5
作者：
Merfeld, DM;Park, S;Wood, S
通讯作者：
Wood, S
影响因子：
--
作者：
MANN, CW;BERTHELOTBERRY, NH;DAUTERIVE, HJ
通讯作者：
DAUTERIVE, HJ