This limits the applicability of the results to anything beyond the experiment itself, which decreases or eliminates the value of those results. Research studies often fall prey to experimental bias, in which the results are not representative of what they are supposed to measure. The tendency for a continuing effort toward a particular goal to decline in efficacy after a certain amount of success has been achieved.Īn inclination, predisposition, or prejudice toward something. In research, whether or not study findings can be generalized to real-world scenarios. Data sets with little variability have values that are similar to each other data sets with high variability have values that are more spread out.External validity is the ability to apply conclusions gathered from the results of an experiment to the general population.When this occurs, the resulting data is biased toward those with the motivation to answer and submit the survey, and is therefore not representative of the population as a whole. Response bias is when only highly motivated people return a survey.Selection bias occurs when the participants in the sample are not equally and fairly selected for both the experimental and control groups this renders any results from the experiment meaningless.Sampling bias is when the sample in question is not representative of the general population.
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