Research library.
Choose a concept. Read the definition, explore an example and test your understanding.
48 concepts
Research design3 min read
A/B test
Compare two options fairly.
Intermediate
Behaviour and bias2 min read
Social desirability
Answering as the person we would like to be.
Beginner
Data literacy2 min read
Percent / percentage point
Two different ways to describe a change.
Beginner
Data literacy3 min read
Mean and median
Two ways to describe a typical value.
Beginner
Getting started2 min read
Variable
A characteristic that can differ across observations.
Beginner
Getting started2 min read
Operational definition
Specify how an abstract idea will be measured.
Beginner
Data literacy2 min read
Quantitative data
Amounts obtained by counting or measuring.
Beginner
Data literacy2 min read
Categorical data
Describe observations using meaningful groups.
Beginner
Sampling2 min read
Stratified sampling
Sample from every subgroup.
Beginner
Sampling2 min read
Cluster sampling
Select groups before individual units.
Beginner
Sampling2 min read
Convenience sampling
Recruit the people easiest to reach.
Beginner
Survey design2 min read
Open-ended question
Let respondents answer in their own words.
Beginner