Bell Jason, Burr David C, Crookes Kate, Morrone Maria Concetta
School of Psychological Science, University of Western Australia, 35 Stirling Hwy Crawley, WA 6009, Australia.
Department of Neuroscience, Psychology, Pharmacology, and Child Health, University of Florence, Via di San Salvi 12, 50139 Florence, Italy.
iScience. 2020 Sep 16;23(10):101573. doi: 10.1016/j.isci.2020.101573. eCollection 2020 Oct 23.
Perception is a proactive ''predictive'' process, in which the brain takes advantage of past experience to make informed guesses about the world to test against sensory data. Here we demonstrate that in the judgment of the gender of faces, beta rhythms play an important role in communicating perceptual experience. Observers classified in forced choice as male or female, a sequence of face stimuli, which were physically constructed to be male or female or androgynous (equal morph). Classification of the androgynous stimuli oscillated rhythmically between male and female, following a complex waveform comprising 13.5 and 17 Hz. Parsing the trials based on the preceding stimulus showed that responses to androgynous stimuli preceded by male stimuli oscillated reliably at 17 Hz, whereas those preceded by female stimuli oscillated at 13.5 Hz. These results suggest that perceptual priors for face perception from recent perceptual memory are communicated through frequency-coded beta rhythms.
感知是一个主动的“预测性”过程，在这个过程中，大脑利用过去的经验对世界做出有根据的猜测，以便对照感官数据进行检验。在这里，我们证明，在对面孔性别的判断中，β节律在传达感知体验方面发挥着重要作用。观察者在强制选择中被分类为男性或女性，面对一系列面部刺激，这些刺激在外观上被构建为男性、女性或雌雄同体（形态相等）。雌雄同体刺激的分类在男性和女性之间有节奏地振荡，遵循一个包含13.5赫兹和17赫兹的复杂波形。根据之前的刺激对试验进行分析表明，在男性刺激之后出现的对雌雄同体刺激的反应以17赫兹可靠地振荡，而在女性刺激之后出现的反应则以13.5赫兹振荡。这些结果表明，来自近期感知记忆的面部感知的感知先验是通过频率编码的β节律来传达的。
