This constitutes a deficit in overall adaptive functioning. His ABC score is consistent with Boone's intellectual functioning, and indicates that Boone has difficulty functioning in his environment. However, this appears to be an under-estimate of Boone's true capabilities, given his lack of interest in the activities and uncooperativeness. Visual motor skills and gross motor skills are well-developed. In summary, Boone displays a pervasive impairment in the development of reciprocal social interaction, with a severe deficit in verbal and nonverbal communication skills.
Vebal communication is delayed and marked by the presence of echolalia.
Boone does not appear to use speech to communicate with others. He engages in restrictive, repetitive and stereotyped patterns of behavior and has difficulty adjusting to changes in routine. The behavior patterns that Boone exhibits, such as not attending to or not listening to adult directives, are related to the autism. His amazing abilities relating to long term memory are also characteristic of autism. Boone does display strength in his affection for his parents and participation in demonstrating affection.