Observational study

type of reactivity in which individuals modify an aspect of their behavior in response to their awareness of being observed

study with repeated observations over time

method of observation in social science

type of study based on universal sampling

empirical study in which individuals/clusters exposed to the experimental and control conditions are determined by factors outside the control of the investigators (nature), but the process governing the exposures arguably resembles random assignment

study that draws inferences from a sample to a population, in cases where the independent variable is not under the control of the researcher because of ethical concerns or logistical constraints

A quasi-experiment is a research design used to estimate the causal impact of an intervention. Quasi-experiments share similarities with experiments and randomized controlled trials, but specifically lack random assignment to treatment or control. Instead, quasi-experimental designs typically compare groups that are either preexisting (e.g., different dog breeds) or groups that were created without random assignment (e.g., students attending different universities).

social sciences statistical technique that mimics an experimental research design using observational study data by studying the differential effect of a treatment on a 'treatment group' versus a 'control group' in a natural experiment

statistical method

statistical method in genetic epidemiology

method of statistical analysis

type of medical research study

statistical matching technique to estimate an intervention’s effect by accounting for the covariates that predict receiving the treatment, reducing the bias due to confounding variables

ratio of the number of outcomes in which a specified event occurs to the total number of trials

causal inference method