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Glossary Item Description

Radiography is the making of film records (radiographs) of internal structures of the body by exposure of film specially sensitized to x-rays or gamma rays. 

Rage Reduction Therapy

Rage reduction therapy is a form of attachment therapy, an extremely controversial group of therapies designed to help children with attachment disorders.

Random Allocation

Random allocation is a method that uses the play of chance to assign participants to comparison groups in a research trial.

Random or Randomised Control Trial

Random or randomised control trial is an experiment in which two or more interventions, possibly including a control intervention or no intervention, are compared by being randomly allocated to participants.


Ranflutin is a brand name for fluoxetine, a type of SSRI antidepressant, used to treat a variety of conditions including anxiety and depression.


Rapamycin is a type of antibiotic, a type of immunosuppressant, and a type of serine/threonine kinase inhibitor.

Rapid Prompting Method

The rapid prompting method is a form of augmentative or alternative communication which involves a therapist using constant, fast-paced questioning, prodding, and engaging of the person with a disability.

Raven's Progressive Matrices

Raven's Progressive Matrices are a set of non-verbal intelligence tests.


RCT is an acronym for randomised control trial, an experiment in which two or more interventions, possibly including a control intervention or no intervention, are compared by being randomly allocated to participants.


RDI is an acronym for the Relationship Development Intervention, an intervention which aims to develop an individual's ability to participate in authentic emotional relationships by exposing the individual to those relationships in a gradual, systematic way.


Reasoning is the process of thinking about something in a logical way in order to form a conclusion or judgment.


ReAttach is a multi-component intervention that is designed to help people on the autism spectrum improve their information processing which might help them to overcome problems in daily life functioning themselves.

Rebound Therapy

Rebound therapy is the use of trampolines to provide therapeutic exercise and recreation.


Reboxetine is a type of drug called a selective noradrenaline re-uptake inhibitor which is a type of antidepressant.

Reciprocal Imitation Training

Reciprocal imitation training is an intervention which was developed to teach young children with autism to imitate during play.

Reciprocal Play Therapy

Reciprocal play therapy is a comprehensive family intervention designed to help children with autism discover the pleasures of human contact and communication.


Recovery is another term for cure, which is to recover or restore someone from a condition such as autism so that they no longer have that condition.

Recreation Therapy

Recreation therapy is a type of play therapy, which refers to a large group of treatment methods which use the therapeutic benefits of play.


Redux is a brand name for dexfenfluramine hydrochloride, an appetite reduction drug.


Reflexlocomotion is another name for the Vojta method or therapy, a type of patterning therapy which is based on a series of movement patterns which are designed to facilitate neurological feedback to the brain.

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 know of any other items we should include in this section, please email info@informationautism.org.

Please note that we reserve the right not to include an item if we feel that it is not appropriate.


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.