Lentz Jennifer J, Townsend James T
Department of Speech, Program in Cognitive Sciences, Language and Hearing Sciences, Indiana University, Bloomington, IN, United States.
Department of Psychological and Brain Sciences, Program in Cognitive Sciences, Indiana University, Bloomington, IN, United States.
Front Psychol. 2022 Sep 8;13:910740. doi: 10.3389/fpsyg.2022.910740. eCollection 2022.
The purpose of this study is to take preliminary steps to unify psychoacoustic techniques with reaction-time methodologies to address the perceptual mechanisms responsible for the detection of one vs. multiple sounds. We measured auditory redundancy gains for auditory detection of pure tones widely spaced in frequency using the tools of Systems Factorial Technology to evince the system architecture and workload capacity in two different scenarios (SOFT and LOUD). We adopted an experimental design in which the presence or absence of a target at each of two frequencies was combined factorially with two stimulus levels. Replicating previous work, results did not allow an assessment of system architecture due to a failure to observe factor influence at the level of distribution ordering for dual-target stimuli for both SOFT and LOUD scenarios. All subjects demonstrated very modest redundancy gains for the dual-target compared to the single-target stimuli, and results were similar for both LOUD and SOFT. We propose that these results can be predicted by a mental architecture that falls into the class of integrated subadditive parallel systems, using a well-supported assumption that reaction time is driven by loudness. We demonstrate that modeled loudness of the experimental sounds (which ranged between about 0.2 and 14 sones) is highly correlated with mean reaction time ( = -0.87), and we provide a proof-of-concept model based on Steven's Power law that predicts both a failure of distributional ordering for dual-target stimuli and very modest redundancy gains.
本研究的目的是采取初步措施，将心理声学技术与反应时间方法相结合，以探讨负责检测单声与多声的感知机制。我们使用系统因子技术工具，测量了在频率上广泛间隔的纯音听觉检测的听觉冗余增益，以揭示两种不同场景（柔和和响亮）下的系统架构和工作量能力。我们采用了一种实验设计，其中两个频率上每个频率处目标的存在或不存在与两种刺激水平进行析因组合。重复先前的工作，由于在柔和和响亮场景下双目标刺激的分布排序水平上未观察到因素影响，结果无法对系统架构进行评估。与单目标刺激相比，所有受试者在双目标刺激下均表现出非常适度的冗余增益，并且响亮和柔和场景下的结果相似。我们提出，这些结果可以通过一种属于集成次可加并行系统类别的心理架构来预测，该架构使用了一个得到充分支持的假设，即反应时间由响度驱动。我们证明，实验声音的模拟响度（范围约为0.2至14宋）与平均反应时间高度相关（ = -0.87），并且我们基于史蒂文斯幂定律提供了一个概念验证模型，该模型预测了双目标刺激的分布排序失败以及非常适度的冗余增益。
