Macauda Gianluca, Ellis Andrew W, Grabherr Luzia, Di Francesco Roman B, Mast Fred W
Department of Psychology, University of Bern, Bern, Switzerland.
Atten Percept Psychophys. 2019 Jul;81(5):1698-1714. doi: 10.3758/s13414-019-01691-x.
Few studies have investigated the perception of vestibular stimuli when they occur in sequences. Here, three experiments (n = 33) are presented that focus on intravestibular motion sequences and the underlying perceptual decision-making process. Natural vestibular stimulation (yaw rotation or translation) was used to investigate the discrimination process of the direction of a subsequent spatially congruent or incongruent translation or rotation. The few existing studies focusing on unimodal motion sequences have uncovered self-motion aftereffects, similar to the visual motion aftereffect, possibly due to altered processing of sensory stimuli. An alternative hypothesis predicts a shift of spatial attention due to the cue motion influencing perception of the subsequent motion stimulus. The results show that participants systematically misjudged the direction of motion stimuli well above the detection threshold if the direction of the preceding cue motion stimulus was congruent with the direction of the target (a motion aftereffect). Hierarchical drift diffusion models were used to analyze the data. The results suggest that altered perceptual decision-making and the resulting misperceptions are likely to originate in altered processing of sensory vestibular information.
很少有研究调查前庭刺激序列出现时的感知情况。在此，我们展示了三个实验（n = 33），这些实验聚焦于前庭内运动序列以及潜在的感知决策过程。使用自然前庭刺激（偏航旋转或平移）来研究后续空间上一致或不一致的平移或旋转方向的辨别过程。现有的少数关注单峰运动序列的研究发现了自我运动后效，类似于视觉运动后效，这可能是由于感觉刺激处理的改变。另一种假设预测，由于线索运动影响对后续运动刺激的感知，会导致空间注意力的转移。结果表明，如果先前线索运动刺激的方向与目标方向一致（运动后效），参与者会系统性地误判远高于检测阈值的运动刺激方向。使用分层漂移扩散模型来分析数据。结果表明，感知决策的改变以及由此产生的错误感知可能源于前庭感觉信息处理的改变。
