A reformulation of social influence theory is presented as a taxonomy, deci
sion tree, and glossary of key terms. Types of social influence are sorted
on the basis of four "Fundamental Interpersonal Influence Distinctions": (a
) level of cognitive processing (conscious vs. nonconscious); b) perceived
intentionality (intentional vs. unintentional vs. orthogonal/irrelevant); (
c) relative social status thigh vs. peer vs. low vs. orthogonal/irrelevant)
; and (d) direction of change (positive vs, negative vs. orthogonal/irrelev
ant). Nonconscious influence (low level of processing) includes affective e
valuation (attraction, repulsion), schema/norm activation, echo and hysteri
cal contagion, social facilitation, social leafing, and unlearned social re
sponses. Intentional influence (compliance/anticompliance) includes obedien
ce, rebellion, direct conformity and anticonformity, and power-of-the-power
less. Unintentional influence (imitation/anti-imitation) includes indirect
conformity and anticonformity, identification, and disinhibitory contagion.
A residual set of influence types includes reactance, informational influe
nce, and direct and vicarious learning. New definitions of social influence
terms were derived deductively from the four Influence Distinctions. The r
eformulation suggests several possible directions for future research and p
oses at least as many interesting empirical questions as it answers.