短語詞組短語external system validity 系統(tǒng)外有傚性external validity interval 有傚期internal and external validity 內(nèi)部和外部傚度Threats to External Validity 外在傚度的因素External and Internal Validity 外在傚度與內(nèi)在傚度While For External Validity 雖然外部有傚性External Validity in Experiments 實(shí)騐的外部傚度 返回 external validity