When chad wrinkles his nose in disgust when his mother presents him with roasted cauliflower, he then experiences an increasingly intense emotional aversion to the dish. chad is likely experiencing the effect?

This is the facial feedback effect. This concept holds that we can actually influence our emotional experiences by the facial expressions we give. In this case, our experience of foods that we don't (or do) like can be made more pleasant (or less so) based on how we react to the appearance of the food.