rand - Redf
- random sample
- random sampling error
- range
- rank-order equality
- ranking
- rating
- Rating
- ratio measurement
- rational
- rational action
- rational action theory
- rational choice theory
- rational choices
- rational state
- rational-choice theory
- rational-systems theory
- rationalism
- rationalities
- rationality
- rationality, formal
- rationality, functional
- rationality, substantive
- rationalization
- Ratzenhofer, Gustav
- re-study
- reaction formation
- reactive depression
- real
- real socialism
- real socialist
- realism
- realist criminology
- rebellion
- rebellion, revolution
- recency effect
- recidivism
- recidivist
- reciprocity
- rectangular clustering
- redemptive movement
