Research Methods & Study Design

a research design where investigators observe and collect data on participants without actively assigning them to treatment or control groups.

a type of research in which participants are assigned to treatment or control groups using methods other than random allocation.

a structured, weighted-ranking method used to generate, discuss, and prioritize a large number of ideas or issues.

a type of composite measure in which multiple individual outcomes are combined at the patient level into a single score according to predefined rules.

a collaborative strategy that actively involves diverse stakeholders from different sectors, disciplines, and backgrounds in decision-making, problem-solving, and project implementation.

an approach to inquiry that combines both qualitative and quantitative research methods within a single study or research program.

a group within OMERACT that is primarily dedicated to the methods and processes used to develop, validate, and implement Core Outcome Sets (COS).

a specialist who develops, evaluates, and applies research methods and techniques to ensure that studies are designed, conducted, and analyzed with rigor and accuracy.

the structured framework of principles, procedures, and techniques that guide how research or problem-solving is carried out in a specific field.

refer to the key psychometric qualities of an instrument or tool that determine how well it measures what it is intended to measure.