The study examined the effectiveness of enhancing perceptual differentiation in the training of four developmentally delayed preschool children who were so low-functioning that they did not demonstrate oddity responding (ability to choose one distinct stimulus from a group of identical stimuli). Instead of the Arabic numerals used in the original…

This paper reviews, first, experimental studies of perceptual-cognitive development and related work directed to the assessment of infant intelligence and, second, naturalistic observation of the exploratory patterns of infants during free play. Techniques used, such as the Fagan Test of Infant Intelligence, offer the potential to identify…

Investigates the drawing and copying skills of nine autistic and eight mentally retarded children matched for mental age. Results indicate a similarity of performance for the drawing tasks and significant differences concerning the copying. Discusses the specific functions performed better by the autistic children and provides illustrative…

Highlights similarities and differences between the art making of normally developing and mentally retarded individuals. Defines pathological art as outsider art that can never be creative in the sense of relating to the artistic domain and engaging in a creative dialog with other artists that shape that domain. (MJP)

Presents a series of pictures drawn by an autistic adult over a period of years. The pictures represent recollections of a day in his childhood. This representation is notable because of its consistent theme, as well as its reflection of the ability to reexperience and enjoy pleasant past memories. (MJP)

Reviews the results of a longitudinal study examining the development of drawing skills of six children with Williams Syndrome. Presents quantitative and qualitative data regarding recognizability, organization, and developmental progress. Reveals that, although extremely delayed, the children made consistent progress in a manner similar to normal…

Traces the development of artistic ability in a six-year-old boy with autism and mild mental retardation. Addresses questions concerning autism and artistic development including whether intellectual realism is a necessary precursor to visual realism and whether a two-dimensional photographic memory is used as opposed to three-dimensional…

Reviews the work of neurobiologist, David Marr, concerning artistic ability and autism. Summarizes Marr's theory of perceptual vision illuminating the relationships among object, observer, perceptual process, and image. Briefly reviews the cases of four autistic people with extraordinary drawing skills. (MJP)