EHKIRCH QUENTIN PIERRE JEAN
| Graduate School of Humanities and Human Sciences Division of Human Sciences Department of Behavioral Science | Postdoctoral Fellow |
Researcher basic information
■ URLresearchmap URLホームページURL■ Various IDsORCID IDJ-Global ID■ Research Keywords and FieldsResearch KeywordSocial acceptability
Behavioral science
Design
Research FieldHumanities & Social Sciences, Social psychology, Social acceptability
Humanities & Social Sciences, Design, Co-creation
Career
■ CareerEducational Background Apr. 2021 - Mar. 2025, Kyushu University, Graduate School of Design, Ph.D., Japan
Sep. 2015 - Sep. 2020, University of Technology of Belfort-Montbeliard, Department of Ergonomics, Design and Mechanical Engineering, Master of Mechanical Engineering, France
Research activity information
■ PapersBehaviour change design for reducing plastic usage by perceived similarity nudgeQuentin Ehkirch; Ferdi Raharja; Udari Samaranayake; Ken-ichi Sawai; Akane Matsumae
Proceedings of the Design Society, Aug. 2025
English, Scientific journal,
ABSTRACT:This study explores the influence of perceived similarity on pro-environmental behavior, focusing on plastic reduction. Participants’ daily plastic use and reduction were tracked over 30 days via online chat software, with controlled nudges from an agent. Each group included two examinees and one agent. Behavioral data were analyzed to evaluate predictability from various perspectives and its relationship with behavioral change. Results showed significant differences in predictability based on perceived similarity, particularly during the first 10 days. Furthermore, nudges, consumption levels, and behavioral changes significantly affected predictability within the first 20 days. These findings contribute to understanding how perceived similarity can enhance nudging strategies to promote sustainable behavior and reduce plastic consumption. HOW THE CO-CREATIVE PROCESS AFFECTS CONCEPT FORMATIONAkane Matsumae; Ferdi Trihadi Raharja; Quentin Ehkirch; Yukari Nagai
Proceedings of the Design Society, 1, 1775, 1786, Cambridge University Press ({CUP}), Aug. 2021
English, Scientific journal,
AbstractThe importance of forming concepts in one's mind has been argued from various perspectives in design studies. This experimental study examines how the co-creative process affects concept formation considering its depth.The authors conducted a learning experiment applying three processes; non-interactive (NI), interactive but non-co-creative (NC), and interactive and co-creative processes (C). To evaluate whether and how deep the concept is formed in the examinee's mind, mimetic Japanese words, which contain several different explicit concepts underlying a certain integrated implicit concept, were chosen as learning materials. The examinees without any knowledge about mimetic Japanese words were gathered globally and the experiment was conducted fully online using English. Examinees were tested several times to measure how they had formed these concepts for comparing the processes.The findings suggest that the co-creative process enhances the depth of concept formation: involvement load and willingness to participate in the co-creative process lead to deeper concept formation.
