We all need to feel that we are competent at something. The more things your child feels good about doing the more feelings of competence she will have, leading to increased self esteem.
Your child will likely have a sense of competence related to her special interest. Her feelings of competence are probably well deserved, as there are probably few others with her knowledge. The challenge for the Asperger’s Disorder child is to encourage her to share her competence with others in a way that is inviting. Finding a club for her special interest provides fun, competence, and a chance to share it with others.
Find opportunities to point out to your child the things she is good at. She does not have to earn the first-place ribbon in an art contest to feel competent. She can feel competent that she consistently shows up for her lessons, paints something new each class, and is good at mixing colors. Look for all the ways she is good, not just the obvious. Your verbal recognition will eventually be replaced by her own self-acknowledgment.
Your child can also be competent in character traits. She need not have a talent or skill to experience competence. She can feel good about being honest, trustworthy, a loyal friend, or someone who helps others in need.