Every scientific experiment has a level of ecological validity (EV). The EV of an experiment is the amount the results can be used to represent results of real life situations.
For example, an experiment which measures one's ability to calculate math equations while being whipped by leather-clad bondage-monkeys and being force-fed glue-covered crayons will have low EV, because it is an experiment involving a situation which is incredibly unlike any situation that most human beings will ever find themselves in.
However, an experiment which measures one's ability to calculate math equations after having just locked the keys in the car by mistake, or while driving in heavy traffic, has high EV, as this involves a situation which is relatively common in normal life.

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