This protocol was made for an intervention in the stigma of ASD through an experience of simulated autistic visual perception and video-based social contact. The intervention is conducted as an experiential workshop for the ASD simulator. Participants voluntarily attend the workshop. In the workshop, they receive a short lecture on autistic perception, a simulated experience using the ASD simulator, a narrative video of individuals with ASD, and a group discussion. They complete the multidimensional attitudes scale, which was developed to measure four attitudes toward ASD: negative affect, calm, cognitions, and behaviors. The attitudes are measured three times: the period of registration with the workshop, during participation in the workshop, and six weeks after the workshop. With regard to the measure during participation in the workshop, attendees respond to the attitudes at the beginning or end of the workshop, to confirm whether attitudes changes are attributed to the effectiveness of the intervention or artifacts resulting from participation in the workshop.