QUOTE : Having worked as a clinician for almost 40 years, I have seen some young adults, who had the classic, clear and conspicuous signs of Asperger’s syndrome in early childhood, achieve over decades a range of social abilities and improvements in behaviour such that the diagnostic characteristics became sub-clinical; that is, the person no longer has a clinically significant impairment in social, occupational, or other important area of functioning. There may still be very subtle signs of Asperger’s syndrome, but when the diagnostic tests are re-administered, the person achieves a score below the threshold to maintain the diagnosis. There is now longitudinal research that is starting to confirm clinical experience that about 10 per cent of those who originally had an accurate diagnosis of Asperger’s syndrome in childhood no longer have sufficient impairments to justify the diagnosis (Cederlund et al. 2008; Farley et al. 2009).