[AMOS] Model with a categorical IV


New Member
Hi all,

I am looking for some AMOS advice regarding an experiment I've conducted, with a categorical IV. How should I include this categorical IV in AMOS?

Experiment background:
Participants in the experiment received a news item about brand A, brand B, or brand C (3 different types of brands). I am trying to prove that brand C leads to more word-of-mouth than the other 2 brands, mediated by 2 parallel mediators (+ moderation on the path of both mediators to Y).

How should I build this model in AMOS?
Should I make 2 dummy variables, like on the attached picture?

X's: brand type A, B, C
Mediator 1: M1 (latent, Likert)
Mediator 2: M2 (latent, Likert)
Y: word-of-mouth (latent, Likert)
Moderator: Mo (latent, Likert)

Kinds regards, and many thanks,