（Last updated : 2026-01-18 09:58:14）
  TADAHIRO SHIMOTSUKASA
   Department   Department of Interpersonal and Social Psychology, Faculty of Psychology
   Position   Assistant Professor (Lecturer)
■ Present specialized field
Personality psychology 
■ Book and thesis
1. Article Understanding Individual Personality Structures through Idiographic Factor Analysis and Network Models   (Collaboration) 2026/01
2. Article The role of reputational concerns in pathological altruism and healthy selfishness   (Collaboration) 2026
3. Article Development of the Japanese version of the Healthy Selfishness and Pathological Altruism Scale   (Collaboration) 2025
4. Article Incremental validity of the sense of coherence vis-à-vis depressive tendencies and dispositional aggression   (Collaboration) 2025
5. Article Relationship between reputational concern and altruistic behavior in adolescence and adulthood   (Collaboration) 2025
6. Article Strengths Knowledge Scale and Strengths Use Scale for Children: Development of short version scale using item response theory   (Collaboration) 2025
7. Article The structure of Japanese personality-descriptive terms   (Collaboration) 2024/04
8. Article I really am more important than you: The relationship between the Dark Triad, cognitive ability, and social value orientations in a sample of Japanese adults   (Collaboration) 2023
9. Article A Validation of the Japanese Adaptation of the Big Five Inventory-2.   (Collaboration) 2022/10
■ Academic background
1. 2016/04～2020/07 〔Doctorial Course (2nd Semester)〕, Graduate School, Division of Letters, Waseda University, Completed,
2. 2014/04～2016/03 〔Master Course〕, Graduate School, Division of Letters, Waseda University, Completed,
3. 2010/04～2014/03 Faculty of Literature, Gakushuin University, Graduated,