free association
noun [ U ] uk/ˌfriː ə.səʊ.siˈeɪ.ʃən/ us/ˌfriː ə.soʊ.siˈeɪ.ʃən/
（研究人类大脑工作原理的）自由联想
a method of trying to see how the human mind works, in which a person says the first word that they think of after hearing a word that is spoken to them