The research is to explore the individuation processes within parent-child relationship context during adolescence. A relational perspective on individuation processes is presented which involves exploring the constructs of individuality and connectedness, and a set of scales to measure the individuation processes are developed. Research procedure involves multiple methods such as survey, and focus group interview. Data were analyzed by qualitative and quantitative data analysis procedures. A model of multi-individuation process, which includes individuality and connectedness in relationship, is presented and used to revise the Psychological Separation Inventory and clarify the issue of conflict relations among individuation, parent-child, and family relationships for adolescents in Taiwan. Results were also discussed the implications of the model of multi-individuation process which is an alternative model to Separation-Individuation model.