Intuition, metacognition, and subjective uncertainty interact in complex ways
to shape the creative design process. Design intuition, a designer's innate
ability to generate creative ideas and solutions based on implicit knowledge
and experience, is often evaluated and refined through metacognitive
monitoring. This self-awareness and management of cognitive processes can be
triggered by subjective uncertainty, reflecting the designer's self-assessed
confidence in their decisions. Despite their significance, few creativity
support tools have targeted the enhancement of these intertwined components
using biofeedback, particularly the affect associated with these processes. In
this study, we introduce "Multi-Self," a BCI-VR design tool designed to amplify
metacognitive monitoring in architectural design. Multi-Self evaluates
designers' affect (valence and arousal) to their work, providing real-time,
visual biofeedback. A proof-of-concept pilot study with 24 participants
assessed its feasibility. While feedback accuracy responses were mixed, most
participants found the tool useful, reporting that it sparked metacognitive
monitoring, encouraged exploration of the design space, and helped modulate
subjective uncertainty