For instance, in a situation where we are measuring the motivations behind the ratings and reviews of the products on e-commerce portals, the normative beliefs may not be important at all (my presumption) since it is an individual act on my internet device (cell phone or laptop or desktop) wherein the external/social influence may play no role at all. So, in such a scenario can we test only behavioral beliefs in a model, based upon TRA? What would be the justification for skipping the normative beliefs from the model altogether? Please share any relevant citations.