Session 7, Room 1 (East), TWS-007: "The Theory and Practical Techniques of PAC Analysis" The speaker is Takeda Tetsuo (Fukushima University) and Ito Takahiko (Wakayama University). PAC stands for Personal Attitude Construct, a case study method developed by Takeda in 1993 and 1994 to measure individual attitude structures. This analysis method involves free association, similarity rating between associated items, cluster analysis based on similarity distance matrices, participants' reports on cluster structures, and the researcher's comprehensive interpretation. The session will introduce the theory and practical techniques of PAC analysis, integrating qualitative and quantitative methods. Session 8, Room 2 (West), TWS-008: "Bayley Infant Development Test" The speakers are Nakazawa Jun (Ibaraki University), Tanaka Kousei (National Center for Child Health and Development), and Katsumoto Masahiro (Matsuyama University). The Bayley Development Test is a comprehensive developmental assessment method consisting of individual tests for cognitive, language, and motor skills, and a parent questionnaire for social-emotional and adaptive behaviors. It is widely used globally, based on the latest developmental psychology theories and empirical research, and is a world standard for developmental assessment in neonatal and pediatric medical fields. This workshop will introduce the content and assessment of the Bayley test for those interested in developmental assessment of infants and young children.Session 7, Room 1 (East), TWS-007: "The Theory and Practical Techniques of PAC Analysis" The speaker is Takeda Tetsuo (Fukushima University) and Ito Takahiko (Wakayama University). PAC stands for Personal Attitude Construct, a case study method developed by Takeda in 1993 and 1994 to measure individual attitude structures. This analysis method involves free association, similarity rating between associated items, cluster analysis based on similarity distance matrices, participants' reports on cluster structures, and the researcher's comprehensive interpretation. The session will introduce the theory and practical techniques of PAC analysis, integrating qualitative and quantitative methods. Session 8, Room 2 (West), TWS-008: "Bayley Infant Development Test" The speakers are Nakazawa Jun (Ibaraki University), Tanaka Kousei (National Center for Child Health and Development), and Katsumoto Masahiro (Matsuyama University). The Bayley Development Test is a comprehensive developmental assessment method consisting of individual tests for cognitive, language, and motor skills, and a parent questionnaire for social-emotional and adaptive behaviors. It is widely used globally, based on the latest developmental psychology theories and empirical research, and is a world standard for developmental assessment in neonatal and pediatric medical fields. This workshop will introduce the content and assessment of the Bayley test for those interested in developmental assessment of infants and young children.