Feeling the Beat (and Seeing It, Too): Vibrotactile, Visual, and Bimodal Rate Discrimination.
Feeling the Beat (and Seeing It, Too): Vibrotactile, Visual, and Bimodal Rate Discrimination.
复制标题
DOI：
10.1163/22134808-20191413
复制
发表时间：
2019-09
影响因子：
1.6
通讯作者：
Mercedes B. Villalonga;Rachel F. Sussman;R. Sekuler
中科院分区：
文献类型：
--
作者：
Mercedes B. Villalonga;Rachel F. Sussman;R. Sekuler
节拍是感知经验的基本单位之一。节拍是由有规律的间歇性刺激产生的，通常与听觉有关，但节拍的体验也可以由其他形式的刺激产生。我们研究了鲁棒性的视觉，振动触觉，和双峰信号作为源的节拍感知。受试者尝试区分以3 Hz或6 Hz输送的脉冲串。为了研究信号的鲁棒性，我们故意使用时域噪声在三分之二的试验中降低信号。在这些试验中，脉冲间间隔（IPI）是随机的，通过具有不同方差的零均值高斯分布的随机样本独立于标称IPI扰动。这些扰动产生了IPI的方向变化，这增加或减少了混淆两种脉搏率的可能性。除了提供信号鲁棒性的测定外，该范例还可以测量受试者的判断如何受到连续IPI的影响。逻辑回归揭示了强烈的首因效应：受试者的决定不成比例地受到试验初始IPIs的影响。响应时间和漂移扩散模型的参数估计表明，信息积累更迅速地与双峰刺激比任何单峰刺激单独。对每种情况下的错误率分析表明，即使IPI变异性增加，也能做出一致的最佳决策。最后，振动触觉信号传递的节拍信息被证明与视觉信号传递的信息一样鲁棒，证实了振动触觉刺激作为通信渠道的潜力。
Beats are among the basic units of perceptual experience. Produced by regular, intermittent stimulation, beats are most commonly associated with audition, but the experience of a beat can result from stimulation in other modalities as well. We studied the robustness of visual, vibrotactile, and bimodal signals as sources of beat perception. Subjects attempted to discriminate between pulse trains delivered at 3 Hz or at 6 Hz. To investigate signal robustness, we intentionally degraded signals on two-thirds of the trials using temporal-domain noise. On these trials, inter-pulse intervals (IPIs) were stochastic, perturbed independently from the nominal IPI by random samples from zero-mean Gaussian distributions with different variances. These perturbations produced directional changes in the IPIs, which either increased or decreased the likelihood of confusing the two pulse rates. In addition to affording an assay of signal robustness, this paradigm made it possible to gauge how subjects' judgments were influenced by successive IPIs. Logistic regression revealed a strong primacy effect: subjects' decisions were disproportionately influenced by a trial's initial IPIs. Response times and parameter estimates from drift-diffusion modeling showed that information accumulates more rapidly with bimodal stimulation than with either unimodal stimulus alone. Analysis of error rates within each condition suggested consistently optimal decision making, even with increased IPI variability. Finally, beat information delivered by vibrotactile signals proved just as robust as information conveyed by visual signals, confirming vibrotactile stimulation's potential as a communication channel.