peripheralism
/pɪˈrɪf(ə)rəlɪz(ə)m/ /pɪˈrɪf(ə)r(ə)lɪz(ə)m/noun
1 Psychology. The tendency to seek explanations of behaviour in terms of direct responses to external stimuli rather than cognitive processes or other internal factors.
2Concern for, or belief in the importance of, peripheral regions, factors, etc., rather than central ones.
Origin
1920s; earliest use found in Journal of Philosophy. From peripheral + -ism.