ABA is known to be a type of science that can be considered to be rather broad. ABA means Applied Behavior Analysis. ABA is often the course that is used by those who would like to become educators or teachers.
For example, this is one of the sciences that educators who would like to teach autistic students should take. IBI, on the other hand, is a type of technique that is usually done by those who would like to do therapy. This is also the type of technique that future psychologists may want to get. Do remember that to learn the technique; they would need to go intense training.