Competently delivered, an intervention and instruction program, can help learners with autism make meaningful changes in many areas. But most learners require a great deal of carefully planned instruction and practice on most skills, so changes do not occur quickly.
As mentioned earlier, quality programs, based on behavioral intervention and instruction, address a wide range of skill areas, but the focus is always on the individual learner, so goals vary from learner to learner, depending on age, level of functioning, family needs and interests, and other factors. The rate of progress also varies from one learner to the next.
Some acquire skills quickly, others more slowly. In fact, an individual learner may make rapid progress in one skill area such as reading, and need much more instruction and practice to master another, such as interacting with peers.