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During the last few years the prevalence of autism and Autism Spectrum Disorder (ASD) has increased greatly. A recurring issue is the overlap and boundaries between Intellectual Developmental Disorder (IDD), ASD and Schizophrenia Spectrum Disorders (SSD). In clinical practice with people with IDD, the alternative or adjunctive diagnosis of ASD or SSD is particularly challenging. The purpose of this paper is to define the boundaries and overlapping clinical characteristics of IDD, ASD and SSD; highlight the most relevant differences in clinical presentation; and provide a clinical framework within which to recognize the impact of IDD and ASD in the diagnosis of SSD.

A systematic mapping of the international literature was conducted on the basis of the following questions: first, what are considered to be core and overlapping aspects of IDD, ASD and SSD; second, what are the main issues in clinical practice; and third, can key diagnostic flags be identified to assist in differentiating between the three diagnostic categories?

Crucial clinical aspects for the differentiation resulted to be age of onset, interest towards others, main positive symptoms, and anatomical anomalies of the central nervous system. More robust diagnostic criteria and semeiological references are desirable.

The present literature mapping provides a comprehensive description of the most relevant differences in the clinical presentation of ASD and SSD in persons with IDD.

Claims that people with autism spectrum disorders (ASD) are overrepresented in offending populations and are more likely to commit crimes than others are explored in this review. Evidence to date makes these claims difficult to substantiate, although methodological difficulties make this area particularly challenging. ASD does not appear to account for a large number of crimes in society, though certain characteristics may render those on the spectrum vulnerable to offending. Comorbid psychiatric conditions such as depression and psychosis, when present in a person that additionally has ASD, are important risk factors. Once in the criminal justice system, people with ASD are often misunderstood and open to bullying. Very little is known about what treatment programmes are effective for offenders in this population. This review summarises some of the important studies in this field.

There are few studies of quality but all indications are that mental illness is a common problem in people with autism spectrum disorders (ASD) of all ability levels. Anxiety and mood disorder are common as well as paranoia, but there are problems assessing the phenomenology of illness in people with ASD. Schizophrenia does not appear to be more common in people with ASD. Suggestions are made for assessment and treatment of co‐morbid mental illnesses.

The first autism‐specific piece of legislation in England and Wales, the Autism Bill, put forward by Cheryl Gillan as a private member's bill, has now gone forward to House of Commons committee stage, after attracting almost universal support among MPs, charities and the media. It seeks to redress the widespread lack of local authority provision for the needs of people with autism (defined in the Bill as including all autism spectrum disorders, including Asperger's Syndrome): children, adults (defined as those over 18) and their families. Currently, despite legislative and policy provision for the disabled, many autism spectrum disorder (ASD) children are without appropriate education or assistance before, during and after the transition to adulthood. At least a third of adults with ASD were estimated in the National Autistic Society's report I Exist to be suffering from serious mental health difficulties as a result of lack of support, while families and carers of adults with ASD have been found to be frequently unable to obtain assistance (Rosenblatt, 2008). This article will provide details of the Bill before considering its implications for ASD children, adults and their families.

Relatively little is known about autism spectrum disorder (ASD) in later life, though the available evidence indicates that it is as prevalent as in childhood and youth. The current study was an on‐line questionnaire (of basic biographical information, general health, quality of life and score on the Autism Quotient [AQ] measure) of UK‐resident adults in their forties who had been diagnosed with ASD or suspected they had ASD. The findings indicated health and quality of life problems very significantly greater than the population norms, with strong indications that prototypical problems of younger people with ASD (such as social isolation and anxiety) persist throughout adult life, even in individuals in high‐income professions. Respondents who thought they had ASD were qualitatively identical to respondents with a formal diagnosis ‐ only the strength of symptoms differed. Scores on the AQ measure did not correlate with other symptoms. Although the study is of a relatively small number (N = 29) of people and there are limitations imposed by the study's design, the findings are robust, and indicate an urgent need to examine ASD in the older population using a larger, more demographically representative study.

This review outlines the nature of autism spectrum disorder (ASD) in childhood and early adolescence, its relationship to the autistic condition, and the disabilities and co‐morbid disorders that accompany it. On this basis it gives an overview of the needs of children and families with ASD and the mental health services that they require.

The purpose of this study is to ascertain law enforcement cadet general knowledge of autism spectrum disorder (ASD) and practical knowledge in how to apply various aspects of their profession to persons with ASD.

In total, 341 law enforcement cadet surveys administered across ten individual law enforcement cadet classes were analyzed via two individual ordinary least squares (OLS) regression models. These regression models were designed to predict changes in cadet scores on their (1) general knowledge of autism scale (i.e., general knowledge regarding autism spectrum disorder itself) and (2) interactional law enforcement knowledge of autism scale (i.e., how to apply various aspects of their job to persons with ASD).

Findings show that cadets who had a stronger confidence in their ability to interact with persons who have ASD actually knew less than their counterparts with lower reported overall confidence. However, one's confidence in their ability to identify persons with ASD was associated with having better overall general knowledge of ASD itself. Similarly, the greater one's overall confidence in interacting with persons with ASD was associated with lower interactional knowledge. In each model, general autism knowledge and interactional knowledge were positively associated.

The results of this study have implications for cadet and officer training on ASD as each need to be trained in both general knowledge of autism and interactional autism knowledge skills related to the job functions of being a LEO. Policy implications and directions for future research are discussed.

The literature is sparse on law enforcement knowledge of and interaction with persons who have ASD. As such, this study has the potential to make a strong impact on the literature regarding law enforcement and their knowledge and/or interactions with persons who have ASD.

Autism spectrum disorders (ASDs) are lifelong developmental disorders that are characterised by abnormalities in reciprocal social interaction and communication and stereotyped behaviours and repetitive interests (ICD‐10: World Health Organization, 1992). Although many people with ASD function without support in the community, outcome studies suggest that rates of employment and independent living are poor. Services often need to provide support in the areas of housing, social, occupational, leisure and emotional function. Additionally, ASDs can be associated with high rates of co‐morbid mental health difficulties including depression, anxiety and obsessive‐compulsive disorders. This paper aims to describe the current situation regarding clinical services and what is required from these services to address co‐morbid mental health needs in adults with an ASD.

The general public and professionals from a range of backgrounds have increasingly become interested in autism spectrum disorders. This interest is particularly relevant to learning disability practitioners. Both autism and learning disabilities are independently associated with increased risk of mental health problems. Thus, when a person has learning disabilities and an autism spectrum disorder, a comprehensive assessment for mental health problems is of paramount importance. This paper provides an overview of the assessment of mental health problems in adults and children with neurodevelopmental disorders. The general assessment principles are outlined followed by assessment issues related to specific conditions such as psychoses, mood disorders and attention deficit hyperactivity disorder. Finally conclusions on the clinical implications are drawn.

This paper aims to provide an overview of the recent National Institute for Health and Clinical Excellence (NICE) clinical guidance for diagnosis and treatment of adults with Autism Spectrum Disorder (ASD) and to discuss clinical and practical implications.

This is a summary and discussion of the NICE guidance for adults with autism. This includes discussion of relevant related guidance, the need for transition services for young people with ASD, education of professionals, applicability of the guidance to people with intellectual disabilities and challenges related to implementation of the guidance in a changing National Health Service.

The guidance provides an excellent overview of current and state-of-the-art strategies for diagnosis and treatment of ASD-related behaviours, and their level of evidence. In terms of diagnosis, the main recommendation for clinicians is to carry out a comprehensive assessment for adults with suspected autism, taking into account co-morbid mental health problems and potential unmet needs. In addition, NICE makes recommendations regarding pharmacological and psychological interventions and these are discussed. The guidance also makes specific recommendations regarding service design, for example the formation of Autism Strategy Groups. This will hopefully support the development of specialist adult autism services.

This paper provides new insights into the implications of the recently published NICE clinical guidance for autism in adults, relevant for health care professionals, service managers and service users.