the publication of the first diagnostic criteria for Asperger syndrome. They are applied in clinical practice due to the adhesion to the original description of Hans Asperger. All of the following six criteria must be met for confirmation of diagnosis: Severe impairment in reciprocal social interaction (at least two of the following) inability to interact with peers lack of desire to interact with peers lack of appreciation of social cues socially and emotionally inappropriate behavior All-absorbing narrow interest (at least one of the following) exclusion of other activities repetitive adherence more rote than meaning Imposition of routines and interests (at least one of the following) on self, in aspects of life on others Speech and language problems (at least three of the following) delayed development superficially perfect expressive language formal, pedantic language odd prosody, peculiar voice characteristics impairment of comprehension including misinterpretations of literal/implied meanings Non-verbal communication problems (at least one of the following) limited use of gestures clumsy/gauche body language limited facial expression inappropriate expression peculiar, stiff gaze Motor clumsiness: poor performance on neurodevelopmental examination Gillberg's criteria differ from those given in the DSM-IV-TR. Some scholars have therefore criticized them for "making it difficult to compare with other studies." It has been argued that the failure of some research groups to replicate some of Gillberg's findings "may relate primarily to fundamental differences in diagnostic approach". DAMP, MBD, and ADHD In the 1970s, Gillberg played a leading role in developing the concept Deficits in Attention, Motor control and Perception (DAMP), a concept primarily used in Scandinavia. The DAMP concept as used in more recent publications, refers to Attention-deficit hyperactivity disorder (ADHD) in combination with Developmental Coordination Disorder (DCD). According to Gillberg, it constitutes a "subgroup of the diagnostic category of ADHD, conceptually similar – but not clinically identical – to the WHO concept of HKD (hyperkinetic disorder)" and is diagnosed on the basis of "concomitant attention deficit/hyperactivity disorder and developmental coordination disorder in children who do not have severe learning disability or cerebral palsy". Some scholars disagree with the lumping of ADHD and DCD, with the argument that they are unrelated. Gillberg stated in 2003 that, although he feels that there is a "very real issue of how to deal with the conflict between splitting (ADHD plus developmental coordination disorder (DCD)) and lumping (DAMP)," he nevertheless feels that "the DAMP construct has been helpful in identifying a group of children