Linked from

The 24 pages that link to Observational study, each with the reason it gives.

• Evidence-based medicineCompared with: It supplies evidence when random assignment is impractical or unethical, but is more vulnerable to confounding.

• Randomized controlled trialCompared with: It can answer related questions when researchers do not randomize treatment.

• Clinical trialCompared with: Unlike an interventional trial, it studies treatment choices made outside researcher assignment.

• Experimental designCompared with: Unlike an experiment, it relies on naturally occurring differences rather than planned allocation.

• Field experimentCompared with: It can examine real-world behavior but lacks the experimenter's assigned treatment.

• Natural experimentCompared with: Natural experiments are observational, yet exploit assignment-like variation absent from ordinary comparisons.

• Design of experimentsCompared with: Unlike a designed experiment, it cannot randomize factor settings to control confounding.

• ExperimentCompared with: Unlike an experiment, it does not deliberately set the condition being studied.

• Experimental methodCompared with: Unlike experiments, it does not deliberately allocate the condition under study.

• BiostatisticsCompared with: Unlike randomized trials, it cannot rely on assignment to balance confounding factors.

• Experimental economicsCompared with: Unlike controlled experiments, it cannot directly assign the economic conditions being compared.

• Random assignment (experimental design)Compared with: Unlike random assignment, observed treatment choices can reflect participant characteristics.

• Esther DufloCompared with: Duflo’s trials seek causal evidence that observational comparisons can struggle to establish.

• Research methodCompared with: It contrasts with experiments by observing rather than assigning treatments.

• Austin Bradford HillCompared with: Hill’s causal considerations addressed evidence from observed associations, unlike randomized treatment assignment.

• Correlation does not imply causationCompared with: Observed associations often come from settings where exposures were not randomized.

• LaboratoryCompared with: Observation can reveal patterns when controlled laboratory intervention is unsuitable.

• Psychological researchCompared with: It can examine behavior that researchers cannot or should not manipulate.

• ResearchCompared with: It examines phenomena without the researcher manipulating the conditions.