Orthogonal contrasts
This is pretty technical but you might come across it in papers using analysis of...
Odds = odds ratio
At times in the past I have found the idea of "odds" and odds ratios...
Observer-reported outcome measures (ObsROMs, OROMs)
My usual pedantry that we should be very careful about the word "outcome" here and...
Omitted variable
The is all about summer! OK, it's not generally but the classic explanation of how...
Orthogonal
Posh word meaning "at right angles to", "perpendicular to", "independent of" Details Can come up in a...
Open peer review
See peer reviewing. Dates Created 18.viii.23.
Opting out
More often termed "dropping out" or, mainly by researchers, "attrition". Used to refer to...
Open source software
OK, I admit it, this is mostly here to give a plug to the R...
Open access
A fundamental change in the academic publishing world that has exploded in the 21st Century....
Overprinting
Overprinting is the name for a challenge when plotting large datasets in a scatterplot. ...
Observation
Can be used in two slightly different ways in our field but in both cases...
Ordinal scaling
This is about Stevens’ typology of scales and most of the time it’s a red...
OQ (Outcome Questionnaire) system
The OQ, CORE and compass systems all developed independently with similar aims with the OQ...