A person's performance may change once the person becomes more familiar with the task. The concept of learning effect overlaps with learning curve but is less specific since it may not evaluate incremental change.

Situation: An initial result of a test or task may be different if the test is repeated.


Usually the effect is positive (performance improves) but not always. Performance may involve:

(1) number of errors

(2) time to complete

(3) outcome metric (such as distance traveled, steps completed, etc)


Contributory factors: uncertainty, unfamiliarity, confidence


Implications: This effect needs to be controlled for when comparing results of an intervention. Results after an intervention may simply reflect changes related to the learning effect.


Other uses of "learning effect":

(1) In economics learning may be associated with increased productivity.

(2) The impact of a person's education (learning) and income.

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