Studies of social influence have suffered from limitations in availabl
e data resources. Consequently, they usually have either failed to con
sider the dynamic nature of attitudes or have specified the social env
ironment in some restricted way. This article evaluates a dynamic mode
l of attitude change that includes direct information on individuals n
amed as political discussants. Using party identification as an attitu
de subject to social influence, several findings are advanced. Politic
al discussants are shown to significantly affect change in party ident
ification. In addition, these effects are enhanced or inhibited depend
ing on characteristics of the discussion partners, the nature of the r
elationship, and properties of the interaction. The nature of the rela
tionship interacts with the other components in some interesting and s
urprising ways as well. Overall, the results show that intimacy and re
spect are more important deter-minants of social influence than previo
usly given credit.