The Impact of Masking Stimuli on Audiovisual Integration Mechanisms

The dataset comes from a fNIRS experiment exploring the effects of masking stimuli on audiovisual integration mechanisms, mainly consisting of behavioral data and fNIRS physiological data. Using the LABNIRS functional near-infrared brain imaging device produced by Shimadzu Corporation in Japan (Shimadzu Corporation, Kyoto, Japan) 。 The imaging device uses a near-infrared semiconductor laser with three wavelengths (780 nm, 805 nm, 830 nm) (safety level 1M under IED-60825-1 standard) (Yang Haibo et al., 2019). According to the revised Beer Lambert law (MBLL), the changes in oxygenated hemoglobin concentration (HbO), deoxygenated hemoglobin concentration (HbR), and total hemoglobin concentration (HbT) in the detection area were obtained. The sampling rate of the instrument in this study was 10 Hz. In the fNIRS experiment, a block design was used, with each block containing only one condition (such as visual masking and auditory masking), consisting of three stages: initial resting time of 15 seconds, audio-visual task stage, and recognition task stage. The experimental procedure is detailed in Figure 2A. The experiment consists of 16 blocks, with 4 blocks for each condition, randomly presented among the subjects. The experiment adopts a 2 (visual masking: present, absent) × 2 (auditory masking: present, absent) in subject experimental design. The dependent variables are the relative changes in Oxy Hb concentration during the auditory and visual tasks of the subjects, as well as the accuracy and reaction time of the recognition task.