“Randomized” or “Randomised”—What's the difference?

Usage by country

Where each spelling is used

Of the 12 countries below, 5 prefer “randomized” and 4 prefer “randomised”. Usage levels are out of 100; the more common spelling in each country is in bold.

Usage level out of 100 (if available).
Country	randomized	randomised	Preference
United States	97	3	“randomized”
United Kingdom	38	62	“randomised”
India	72	28	“randomized”
Philippines	96	4	“randomized”
Canada	91	9	“randomized”
Australia	41	59	“randomised”
Liberia	0	0	Not enough data
Ireland	49	51	“randomised”
New Zealand	41	59	“randomised”
Jamaica	0	0	Not enough data
Trinidad & Tobago	100	0	“randomized”
Guyana	0	0	Not enough data

Usage

Examples in context

Real sentences for each spelling. Hover an example to copy it.

“randomized”

In a randomized controlled trial, AT-LXA4 and a…
…pointlessness of many of the randomized gameplay elements.
A 2012 meta-analysis of ten randomized, placebo-controlled trials published in the…
…comparisons, found a linear time randomized algorithm based on a combination…
…(simple) or 12 (complex) attributes, randomized one at a time, about…
A recent randomized control trial comparing the effect…
For example, systematic reviews of randomized controlled trials are key to…
…the system, including a large randomized clinical trial, demonstrated improvements in…
…from 1997-2015 reviewed and published randomized trial protocols with a guarantee…
Making self-help more helpful: A randomized controlled trial of the impact…

“randomised”

…being added every year and randomised.
…a gene can be systematically randomised for a more focused approach…
A randomised controlled trial of Trichuris suis…
Numerous observational studies and randomised trials (RCTs) have found that…
…have been confirmed in a randomised controlled trial.
…asthma in community dwelling children: randomised controlled trial."
…Goldberg, who designed the first randomised controlled trials in British social
…°C) More recently, the first randomised controlled clinical trial comparing machine…
A randomised trial of the impact of…
A randomised algorithm by Mucha and Sankowski,…

Examples are Wikipedia snippets under the CC ShareAlike 3.0 license.

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