Understanding autism
Understanding autism

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Understanding autism

Glossary


Browse the glossary using this index

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D

Developmental

Describes a condition or process which unfolds during child development. Development may reflect a typical pattern in which certain skills and behaviours are attained, following broadly the same time frame in different children. In atypical development, for instance in autism, certain key processes such as language and communication develop at a different rate, in a different way or not at all. (See also developmental trajectory.)


Developmental trajectory

A term for the developmental sequence. This emphasises two facets of typical development: (1) There is a characteristic sequence of 'milestones' such as crawling, sitting up and walking. (2) Early developmental skills such as pointing and looking are thought to lay the foundations for later more sophisticated skills such as play with siblings, friendships with peers, or the complex relationships of the teenage years and adulthood. The idea of an atypical developmental trajectory is an important concept in work on autism.


Diagnostic and Statistical Manual of Mental Disorders (DSM)

The American Psychiatric Association's formal system for the classification and diagnosis of psychiatric, mental health and developmental conditions, which includes criteria for diagnosing autism. The 5th edition, published in 2013, dispensed with the diagnostic sub-types of autism (e.g. Asperger Syndrome) seen in earlier versions. The DSM-5 approach to classifying and diagnosing autism treats it as a continuous spectrum and uses severity scores and specifiers to characterise each individual’s strengths and weaknesses.


Diagnostic criteria

Formal descriptions of medical, psychiatric and developmental conditions, used in making diagnoses. The criteria comprise a list of symptoms or features that an individual must have for a condition or problem to be diagnosed, and in some cases specify additional symptoms that should not be present. (See also DSM and ICD.)


Diagnostic instrument

A set of systematic procedures used to diagnose conditions like autism, for which no medical test can be applied. Diagnostic instruments involve questionnaires, observations of the person and interviews with the family (where possible). The instruments are designed such that the diagnostic criteria are applied in a standard consistent way.


Diagnostic Interview for Social and Communication Disorders (DISCO)

An interview designed for use with the parents of children or adults who are being assessed for an autism spectrum diagnosis. The interview offers a 'dimensional' framework, allowing for ‘graded’ evaluation of how closely an individual matches the criteria for a pervasive developmental disorder, as defined in the ICD and DSM systems.


Dyslexia

A specific developmental condition characterised by problems with reading, writing and spelling as a result of underlying difficulties in processing and remembering information. It is not linked to intelligence.


E

EarlyBird

A three-month education programme run by the UK National Autistic Society (NAS), providing support and encouragement and promoting good practice for parents of newly diagnosed children aged under five years on the autism spectrum. EarlyBird Plus is for parents of children aged four to eight years.


Early Intensive Behavioural Intervention (EIBI)

An intervention for pre-school children on the autism spectrum, using a range of behavioural techniques based on Applied Behavioural Analysis (ABA) principles. Early forms of intervention such as EIBI have proved very effective with some children. However, intensity for the child and demands on parents are issues for consideration.


Echolalia

The repetition of words, phrases or sentences just spoken by others, in a 'parrot-like' fashion. Echolalia is common in individuals on the autism spectrum, and also occurs in conditions such as schizophrenia and Tourette's syndrome. In autism, the repetition may be immediate or delayed.



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