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Glossary Item Description

Depression is the term used to describe feelings of extreme sadness that can last for a long time. These feelings are severe enough to interfere with your daily life, and can last for weeks or months rather than days.


Desiprmaine is a type of tricyclic antidepressant, which is used to treat depression.


Desmopressin is a type of drug called called a vasopressin analogue and is used as an antidiuretic.

Detox or Detoxification

Detox or detoxification is the removal of toxic substances from the body.

Detox or Detoxification Diet

The detox or detoxification diet requires you to avoid processed foods, to eat fresh, organic food and, as far as possible, to eat raw fruit and vegetables.

Development Delay

Development delay is a significant lag in a child's physical, cognitive, behavioural, emotional, or social development.

Developmental Behaviour Checklist

The Developmental Behaviour Checklist is a set of instruments for the assessment of behavioural and emotional problems of children, adolescents and adults with developmental and intellectual disabilities.

Developmental Co-ordination Disorder

Developmental co-ordination disorder is a condition affecting physical co-ordination that causes a child to perform less well than expected for his or her age in daily activities and appear to move clumsily.

Developmental Disability/Disorder

A developmental disability or disorder is a condition that shows itself from infancy or early childhood.

Developmental Disharmony

Developmental disharmony is a condition described by Anna Freud as the uneven progression rate in drive and ego development which can lead to serious pathological consequences.

Developmental Intervention

Developmental interventions are a wide group of interventions designed to target the core deficits within each child rather than his or her outward behaviours.

Developmental Quotient

The developmental quotient (DQ) is the numeric expression of a child's developmental level as measured by dividing the developmental age by the chronological age and multiplying by 100.

Developmental Reflexive Rehabilitation

Developmental reflexive rehabilitation is a type of patterning therapy, based on a series of movement patterns which facilitate neurological feedback to the brain.

Developmental Social-Pragmatic model

The Developmental Social-Pragmatic Model is another name for developmental interventions, a wide group of interventions designed to target the core deficits within each child rather than his or her outward behaviours.

Developmental, Individual-Difference, Relationship-Based Model

The Developmental, Individual-Difference, Relationship-Based Model is the full name for the DIR Method, isa comprehensive, multi-component intervention used to help children with autism and other developmental disabilities.


Dexfenfluramine hydrochloride is an appetite reduction drug, sold under the brand name Redux.


Dexmethylphenidate is a type of stimulant medication, used to treat inattention and hyperactivity, and sold under various brand names including Focalin.


Dextroamphetamine is a form of amphetamine, a type of stimulant medication, and is sold under a variety of brand names such as Dexedrine and ProCentra.


DextroStat is a brand name for dextroamphetamine, a type of stimulant medication, used to treat inattention and hyperactivity.


DHA is an acronym for docosahexaenoic acid, a type of omega 3 fatty acid ingested in some foodstuffs such as fish oil.

About This Glossary

This glossary is designed to explain some of the jargon and gobbledygook used by some people when they talk about autism or research..

You may be able to find more information, including links to other parts of this website, by clicking on the title of an item.

If you can't find the word you are looking for, or you know of a word we should include, please email info@researchautism.net


The fact that an intervention is listed in this glossary does not necessarily mean that we agree with its use. Nor does it necessarily mean that there is any scientifically valid or reliable evidence behind it.