Tim has asked Robin to marry him. Robin isn't sure whether she loves him enough or whether she loves him in the right way. She talks with her sister about all the reasons why it would be wise to marry Tim, and all the reasons why it wouldn't be such a great idea. According to Wilson's theory of reasons-generated attitude change, Robin might regret it were she to base her decision on the reasons she mentioned. Why is that

Robin will definitely regret her decisions due to the fact that it is not made by her completely and her sister played a major role in concluding the results. In the given case, Robin 's decision do not generate her long term attitude and the decision made might not take into consideration the factors that are more important to her.

By giving the authority on some other person's hand Robin is only making the situation more complicated which will eventually lead to her own loss at the personal level.