Research library.
Choose a concept. Read the definition, explore an example and test your understanding.
5 concepts
Research design3 min read
A/B test
Compare two options fairly.
Intermediate
Research design2 min read
Cross-sectional study
Examine a population during a defined period.
Beginner
Research design2 min read
Longitudinal study
Track change through repeated measurements.
Beginner
Research design2 min read
Random assignment
Use chance to allocate experimental conditions.
Beginner
Research design3 min read
Confounder
A common cause that can distort an association.
Advanced