bioRxiv (Cold Spring Harbor Laboratory)
September 21, 2026
Ryoichi Watanabe, Jue Wang, Masafumi Oizumi et al.
preprint
Whether subjective colour experience (e.g., experience of 'red') is shared across children and adults remains a foundational question in developmental psychology and consciousness research. To test this, we compared the relational structures of their colour experiences and identified the mapping that best preserved these structures. Using pairwise similarity judgements for 13 basic colours, we...
Scientific Reports
November 3, 2025
Ryoichi Watanabe, Yusuke Moriguchi
Understanding how perception transitions from an unconscious to conscious state is a central aim of visual consciousness research. The threshold is the boundary at which consciousness arises, and the process from unconsciousness to consciousness is the emergent process. Although studies have investigated the thresholds and emergent processes of visual consciousness in adults, how these...
Schizophrenia Bulletin
October 6, 2025
Charles Fernyhough, Janna De Boer, Paige E Davis et al.
3 citations
Hallucinations figure prominently in a range of psychiatric disorders but, to date, their developmental origins are not well understood. The aim of the present article is to explore how ideas from mainstream developmental psychology can enhance understanding of how hallucinations develop in different modalities across the lifecourse. Hallucinations vary in their clinical significance depending...
Proceedings of the National Academy of Sciences
March 18, 2025
Yusuke Moriguchi, Ryoichi Watanabe, Chifumi Sakata et al.
13 citations
Examination of the subjective qualitative aspects of an experience, or "qualia" in short, is a fundamental and core aspect of consciousness research. How can we characterize the particular quality of redness, i.e. a red quale? Based on a recent proposal of the structural characterization of qualia, which did not rely on verbal descriptions, we developed a task that obtained pairwise similarity...
Frontiers in Psychology
July 10, 2024
Ryoichi Watanabe, Yusuke Moriguchi
IntroductionThe transition of experience from unconscious to conscious, the emergent process, is a crucial topic in consciousness studies. Three frameworks exist to explain the process: (1) consciousness arises in an all-or-none manner; (2) consciousness arises gradually; (3) consciousness arises either all at once or gradually, depending on the level of stimulus processing (low- vs....
Consciousness and Cognition
November 1, 2023
Ryoichi Watanabe, Yusuke Moriguchi
preprint
Visual consciousness studies in humans have primarily focused on adults. However, whether young children's visual consciousness is similar to or different from that of adults remains unknown. This study examined young children's and adults' subjective awareness and objective discrimination for thresholds and emergent processes of visual consciousness in two experiments. In Experiment 1, 20...
July 15, 2023
Naotsugu Tsuchiya, Hayato Saigo, Steven Phillips et al.
preprint
Summary: Establishing Qualia Structure Paradigm.?Do subjective conscious experience and objective brain matters belong to completely different worlds? How are qualia, the contents of consciousness, related to the brain? The question of consciousness and the brain is not only of scientific interest, but it is also directly related to the problems associated with difficulties in understanding...
July 15, 2023
Naotsugu Tsuchiya, Hayato Saigo, Steven Phillips et al.
preprint
主観意識と客観的な物質としての脳は、全く異なる世界に属すのだろうか? 意識の中身であるクオリアと脳はいかに関係しているのか? 意識と脳の問題は、科学的な興味に留まらず、現実社会における人の気持ちの理解の困難に伴う問題にも直接関わる。意識のクオリアは、客観的な言語で定義することすら難しいため、従来の意識研究では、知覚刺激を固定し、経験を「見えた・見えない」という二値的な判断に還元し、その神経相関の探求を試みた。近年、我々は視覚クオリア間の類似度を大規模に計測することでクオリアの構造を特徴づけ、その神経相関とその情報構造を明らかにする新パラダイムを確立した。本領域は、現象学・発達・構成論を加え、知覚と感情クオリアに集中することで、クオリア構造学を創成する。本領域の成果は、他者意識の理解や、動物や人工物の意識理解など、一般社会へも広く還元されうる答えを生み出す新融合領域の創成である。