random control trial

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Categories: Site glossary

An experimental study, using a control group. The term is commonly used in medicine and social sciences (e.g., education).

"A random control trial (RCT) is an experiment where the units of analysis are randomly assigned to different conditions, and statistical methods are used to determine whether any overall difference in the measured outcomes in those conditions is (probably) due to the intervention. Statistics can only indicate how likely a measured result would occur by chance (as randomisation of units of analysis to different treatments can only make uneven group composition unlikely, not impossible)…A RCT is referred to as a 'true experiment' because there is randomisation of the 'units of analysis' (people, classes, schools, etc.) to conditions." (Taber, 2019, 73)

Read about randomisation

[Please be aware that a word may have different nuances, or even a different meaning, according to context.]« Back to Index

Author: Keith

Former school and college science teacher, teacher educator, research supervisor, and research methods lecturer. Emeritus Professor of Science Education at the University of Cambridge.