Delayed measurement refers to any measurement that takes place after some intervention or after a specific time period following an event. In an experiment, typically an intervention or induction takes place and then the outcome is measured. The level of delay in measurement is based on the length of time between the initial experiment and the intervention or induction. In some cases, measurement takes place multiple times; for instance, there is an immediate post-test as well as subsequent tests after a delay of time. In the context of a field investigation, the delay in measurement may reflect evaluation that takes place after a delay of a particular period of time. This entry examines reasons for delays in measurement, the use of multiple delays, ...
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