---
title: Controlled trials
description: "| These are experiments comparing two or sometimes more groups, typically in our field these involve allocating clients to different therapies. | | --- | #### Try also [Randomised Controlled Trial (RCT)](https://www.psyctc.org/psyctc/glossary2/randomised-controlled-trial-rct/) [Double Blind Controlled Trials (DBRCTs)](https://www.psyctc.org/psyctc/glossary2/double-blind/) [Trials](https://www.psyctc.org/psyctc/glossary2/controlled-trials/) [Causality](https://www.psyctc.org/psyctc/glossary2/causality-causal-attribution/) Hierarchy…"
url: "https://www.psyctc.org/psyctc/glossary2/controlled-trials/"
updated: "2021-11-10"
category: All OM book glossary entries
---

# Controlled trials

| These are experiments comparing two or sometimes more groups, typically in our field these involve allocating clients to different therapies. |
| --- |

#### Try also

[Randomised Controlled Trial (RCT)](https://www.psyctc.org/psyctc/glossary2/randomised-controlled-trial-rct/)
[Double Blind Controlled Trials (DBRCTs)](https://www.psyctc.org/psyctc/glossary2/double-blind/)
[Trials](https://www.psyctc.org/psyctc/glossary2/controlled-trials/)
[Causality](https://www.psyctc.org/psyctc/glossary2/causality-causal-attribution/)
Hierarchy of evidence
[Placebo effect](https://www.psyctc.org/psyctc/glossary2/placebo-effect-and-placebos/)
[Nocebo](https://www.psyctc.org/psyctc/glossary2/nocebo-effect/)
Hierarchy of evidence (and web of evidence)
NICE
[Cochrane collaboration](https://www.psyctc.org/psyctc/glossary2/cochrane-collaboration-library/)
ESTs (Empirically Supported Treatments)

#### Chapters

Mostly chapter 10.

#### Dates

Created 2/11/21