How did Mori and Arai ensure that participants perceived the same stimuli?

In the context of Mori and Arai's study on social perception and the effects of different stimuli on participants, the correct answer highlights that specially designed glasses were used to ensure all participants perceived the same visual stimuli. This is significant because the glasses altered the way participants viewed the stimuli without modifying the actual content. By using these glasses, the researchers could control for potential variations in perception caused by individual differences in vision, thus maintaining a consistent experience for all participants.

The use of specially designed glasses allowed for careful manipulation of the visual input, essential in studies requiring uniform exposure to specific stimuli. This approach minimizes variability in how participants process information and enhances the validity of the experimental findings.