func·tion·al·ism /ˈfʌŋ(k)ʃnəˌlɪzəm, ʃənḷˌɪ-/
機能心理學,機能主義,實用第一主義
functionalism
n 1: a psychology based on the assumption that all mental process
are useful to an organism in adapting to the environment
2: any doctrine that stresses utility or purpose