This paper, written in honor of Professor Ed Zigler, focuses on some of the themes in developmental disabilities research that were so central to his work. It has now been nearly 80 years since Leo Kanner first identified the prototypic form – early infantile autism – of what is now autism spectrum disorder. In this article we summarize the development of the concept and the important accumulation of knowledge over time that has now led us to the recognition of a broader autism phenotype just as, at the same time, the current official diagnostic system in the USA has narrowed the concept. We also address current controversies regarding autism as the diagnosis is impacted by age and developmental factors, gender, and cultural issues. In parallel to the work on intellectual deficiency and development pioneered by Zigler and his colleagues, we summarize some of the challenges for the years ahead.

There has been relatively limited research focus on autism in the context of the criminal justice system. The relationship between autism spectrum disorder (ASD) and criminal responsibility is complex. Furthermore, the features inherent to ASD can have a significant bearing on a wide array of other issues in this context including police interviewing, fitness to be tried, culpability and the appropriateness of custodial disposal. This review explores the background to our understanding of ASD, patterns of offending behaviour and the nature of the relationship between this and characteristic ASD deficits. The clinical and legal challenges posed by ASD defendants in terms of identification, assessment and on a broader service level as they negotiate the criminal justice system are highlighted to illustrate the varied difficulties they may encounter and to draw attention to this field as a worthy area of research and training for the medical, legal and law enforcement professions.

Adolescents with Asperger syndrome (AS) are increasingly being placed in academically focused high schools. These students, although academically able, may not be coping with the wider classroom and social demands of transition to, and within, the high school environment. Schools are keen to enrol these students. However, there appears to be a gap between the rhetoric and the reality relating to the varying perceptions of key stakeholders. In this paper we present the results of a study of the perceptions of key stakeholders in the transition of two students with AS into two academically focused high schools. Eight participants were involved in semistructured, one-on-one interviews. Key stakeholders included executive teachers, classroom teachers, students and their caregivers. The results indicated that there were some differences in the teacher and caregiver perspectives across physical, academic and social areas of transition.

This study explored the utility of using keyboarding as an alternative to handwriting for students with ASD who experience handwriting difficulties. Participants included 22 students with ASD (M age = 10.83 ± 1.4 years) who had been using portable word processors in mainstream classrooms for at least 6 months to circumvent handwriting difficulties. Teacher, parent and student questionnaires rated perceptions of students’ motivation, ability, preferences and frequency of use of keyboarding as compared to handwriting, helpfulness of portable word processors and factors contributing to or limiting their use. Keyboarding and handwriting speeds were measured in letters per minute. Two short compositions using handwriting and keyboarding were compared in length and quality. Handwriting legibility was also rated. The teacher, parent and student questionnaires indicated that students’ motivation was generally rated as much higher for keyboarding than for handwriting. Teachers and parents predominantly perceived portable word processors as helpful. The group mean scores for keyboarding speed, and length and quality of keyboarded compositions were greater than comparable group mean scores for handwriting. These differences, however, did not reach statistical significance. Keyboarding, nevertheless, was effective in overcoming difficulties experienced by many students in respect of legibility.

The experiences of clinicians working with the ASD population suggest that parents of children with autism frequently misattribute their child's behaviour, particularly misbehaviour, to autism and that this can be a barrier in behavioural interventions (Howlin and Rutter, 1987). However, no research on the specific attributions that parents of children with ASD make for their child's behaviour could be found. The current study is an exploration of parental attributions within the ASD population. Fifty-nine families participated in this study. Analysis identified a tendency for parents to generalise attributions about ASD-related behaviour to misbehaviour. In addition, analysis identified a tendency to believe that the child's positive behaviour is more stable and controllable by the child than misbehaviour. A relationship was found between parental autistic traits and a tendency for the parent to attribute responsibility to themselves for ASD-related behaviour and misbehaviour.

Because anxiety and other concurrent psychological problems are common among children with high-functioning autism and Asperger syndrome, research initiatives have been devoted to the development of efficacious treatments to address the multifaceted needs of youth with this presentation. Emerging research indicates that when carefully adapted to accommodate for the unique needs of children with autism spectrum disorders (ASD), cognitive-behavioural therapy (CBT) may be a viable treatment modality. Because inherent features of ASD may compromise the efficacy of traditional CBT, our preliminary work suggests that it may be important to gear intervention efforts towards directly addressing core autism symptoms to promote optimal treatment response. This article describes an evidence-based CBT treatment manual modified and expanded to address core ASD features above and beyond anxiety symptomatology. A case example of a 10-year-old boy with Asperger syndrome is presented with supporting data to illustrate the treatment modifications and their rationale. The positive treatment response attained in this case suggests that an enhanced variant of a standard CBT programme may be an efficacious treatment approach for children with ASD and concurrent anxiety.

People with Asperger syndrome (AS) appear to have higher than expected rates of co-morbid psychiatric disorder. The main co-morbid diagnoses are anxiety disorders and depression, but eating disorders, obsessive compulsive disorder, substance abuse and bipolar affective disorder have all been reported. Cognitive Behaviour Therapy (CBT) is used effectively to treat these conditions, so could it be used in people who also have Asperger syndrome? This paper reviews important components and characteristics of cognitive behaviour therapy in relation to its use with people who have Asperger syndrome with reference to the relevant literature and to feedback from people with AS. The use of CBT in people with Asperger syndrome appears promising, but further work is needed to evaluate its effectiveness and to examine which particular aspects of therapy are helpful.

Adolescents with Asperger syndrome (AS: without delay in speech development, diagnosed according to ICD-10 clinical criteria) were compared with a group with high-functioning autism (HFA: all with delayed speech development), and a group with conduct disorder (CD). Family and genetic studies suggest that Asperger syndrome and autism form part of the same spectrum, whereas the social impairments in conduct disorder are assumed to have different origins. The aims were to explore the relationships between early speech development and other aspects of functioning in autistic disorders, and to compare autistic and nonautistic social impairments. Early and current behaviour and IQ profiles were investigated.The CD group were clearly different from both the AS and HFA groups. The AS group tended to have less severe early behavioural abnormalities than the HFA group, and were unlikely to have speech abnormalities, but other communicative, social, and restricted/stereotyped behavioural difficulties were largely of a similar pattern to the abnormalities in the HFA group. Eighty per cent of the AS group met criteria for autism on the diagnostic algorithm associated with the Autism Diagnostic Interview-Revised. By adolescence, the AS group were reported to be as abnormal as the HFA group but in structured 1:1 interaction their conversation was better. IQ profile in the AS group showed relative strength on verbal measures, unlike the HFA group, but relatively good performance on the Block Design subtest of the WISC/WAIS was a feature of both the AS and HFA groups. The results indicate closely similar behavioural manifestations may arise by adolescence despite differences in speech development. Follow-up studies and further family investigations will be required to clarify the origins of these and other patterns of autistic development.

More able individuals with autism and Asperger syndrome (AS) have been shown to pass relatively high level theory of mind (ToM) tasks without displaying commensurate levels of social adaptation in naturalistic settings. This paper presents a social cognitive procedure—the Social Attribution Task (SAT)—that reduces factors thought to facilitate ToM task performance without facilitating real-life social functioning. Sixty participants with autism (N = 20), AS (N = 20), and normally developing adolescents and adults (N = 20) with normative IQs were asked to provide narratives describing Heider and Simmel's (1944) silent cartoon animation in which geometric shapes enact a social plot. These narratives were coded in terms of the participants' abilities to attribute social meaning to the geometric cartoon. The SAT provides reliable and quantified scores on seven indices of social cognition. Results revealed marked deficits in both clinical groups across all indices. These deficits were not related to verbal IQ or level of metalinguistic skills. Individuals with autism and AS identified about a quarter of the social elements in the story, a third of their attributions were irrelevant to the social plot, and they used pertinent ToM terms very infrequently. They were also unable to derive psychologically based personality features from the shapes' movements. When provided with more explicit verbal information on the nature of the cartoon, individuals with AS improved their performance slightly more than those with autism, but not significantly so.

This review describes the current situation with regard to diagnostic instruments for Asperger syndrome. The paucity of such instruments, and the lack of adequate standardisation data amongst the few that do exist, represent a serious omission for both clinicians and researchers. The major problem limiting the development of effective diagnostic or screening instruments is the confusion inherent in ICD-10 and DSM-1V systems in differentiating autism from Asperger syndrome. In the absence of clear and clinically satisfactory diagnostic criteria, efforts to develop valid assessment instruments may be attempting to put the horse before the cart!

The relationship of maternal conversational input to theory of mind development was examined in a study of mother-child conversation involving children with autism, Asperger syndrome, specific language impairment (SLI), and normol development. Speech act analysis using Dore's (1986) categories was completed for conversation samples taken between mother and child during a toy selection task Comparisons of moternal assertions revealed lower proportions of reference to internal stote used with children with autism, Asperger syndrome, and SLI compared to those with normol children. Significant positive associations existed between the children's production of mental assertions and maternal descriptions, explanations, evaluations, attributions of another's internal state, organizational devices, clarifications, and requests for process. There were also significant positive associations between children's theory of mind development and moternal descriptions, explanations, clarifications, acknowledgments, rhetorical questions, and responses to process questions.These results indicate the importance of an elaborative style of maternal conversation to the development of theory of mind.

Tasks of fluency tap the ability to generate multiple responses spontaneously following a single cue or instruction. The present study compared the fluency performance of subjects with autism and clinical control subjects at two different levels of ability (high-functioning subjects with a verbal IQ of 76 or greater, and globally learning disabled subjects with a verbal IQ of 74 or below). A battery of tasks was employed to assess subjects' word fluency (for letters and semantic categories), ideational fluency (for uses of objects and interpretations of meaningless line drawings), and design fluency (for abstract meaningless designs). Subjects with autism showed reduced fluency for both the word and ideational fluency tasks, generating significantly fewer responses than the clinical control subjects. Results were particularly striking for the ideational fluency tasks. On these tasks, autistic subjects produced very low response totals, with the performance of the high-functioning subjects with autism equivalent to that of the learning disabled subjects with autism and significantly inferior to that of the learning disabled control individuals. In contrast, the results of the design fluency paradigm paint a different picture. This paradigm revealed no significant difference in the quantity of designs generated by the subjects with autism and the control subjects but a clear qualitative difference, with the autistic group producing significantly higher rates of disallowed and perseverative responses. Whilst the results of the word and ideational fluency tasks are suggested to support the hypothesis that individuals with autism are impaired in the generation of novel responses and behaviour, the results of the design fluency task are equally consistent with an impairment in the regulation of behaviour through inhibition and/or monitoring. The implications of these findings for the study of executive function abilities in autism are discussed.

Comprehensive data on the developmental history and current behaviours of a large sample of high-functioning individuals with diagnoses of autism, Asperger's syndrome, or other related disorder were collected via parent interviews. This provided the basis for a taxonomic analysis to search for subgroups. Most participants also completed theory of mind tasks. Three clusters or subgroups were obtained; these differed on theory of mind performance and on verbal abilities. Although subgroups were identified which bore some relationship to clinical differentiation of autistic, Asperger syndrome, and Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS) cases, the nature of the differences between them appeared strongly related to ability variables. Examination of the kinds of behaviours that differentiated the groups suggested that a spectrum of autistic disorders on which children differ primarily in term of degrees of social and cognitive impairments could explain the findings.

This study examined the relationship between the development of theory of mind and the development of the belief terms think, know, and guess. Children with autism and Asperger syndrome, matched to children with specific language impairment and normal development, completed false belief, belief term comprehension, and belief term expression tasks. The autistic group's performance on the false belief, belief term comprehension, and belief term expression tasks was significantly poorer than that of the Asperger, language impaired, and normal groups. Across groups an association was found between false belief and belief term performance. Results support a growing body of literature demonstrating links between the development of theory of mind and communicative competence.