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Glossary Item Description

Other specified feeding or eating disorder (OSFED) is a condition when your symptoms don't exactly match those of anorexia, bulimia or binge eating disorder, but it doesn't mean it's a less serious illness.


Osteopathy is a system of diagnosis and treatment for a wide range of medical conditions.


OT is an acronym for occupational therapy, an intervention designed to enable people to participate in daily activities as independently and satisfactorily as possible, using meaningful activities as a means to do this.

Other Dietary Supplements

We use the term other dietary supplements to refer to supplements other than vitamins and minerals.

Other Interventions

Other interventions is a term we use to define any interventions that we have yet to classify within this glossary.

Other Medications

We use the term other medications to describe any medications which don't fit into other categories in this glossary.


The outcome is the effect or impact of an intervention (treatment or therapy) on the participants.

Outcome Measures

Outcome measures are designed to measure the results of an action or intervention, such as a treatment or therapy.

Outdoor Adventure Programme

Outdoor Adventure Programmes sometimes involve residential or journey wilderness-based experiences in which students participate in one or more adventurous challenges and outdoor activities such as hiking, climbing, canoeing, ropes courses and group games.


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

Oxalate Free Diet

The oxalate free diet avoids or eliminates oxalates, crystals found in many plants where they concentrate light and boost photosynthesis.

Oxidative Stress

Oxidative stress is physiological stress on the body caused by the cumulative damage done by free radicals inadequately neutralized by antioxidants.


OXT is an acronym for oxytocin, a hormone which plays an important role in facilitating uterine contractions during parturition and in milk let-down.

Oxygen Therapy

Oxygen therapy is another term for hyperbaric oxygen therapy, which is the medical use of oxygen at a higher than atmospheric pressure.


Oxytocin is a hormone and neurotransmitter that causes the uterus to contract.

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.