True, due to the learning effects with time Amber was able to increase employee productivity of car manufacturing plant.
In a controlled experiment, a learning effect is a good or negative outcome of an action that only becomes noticeable after a particular amount of time has passed. The influence may grow (linearly, exponentially, etc.) over time or it may experience a more abrupt level change after a specific amount of time.
Learning effects, particularly those that are mid- and long-term, can seriously undermine the external validity. The quantity of work (or output) generated by an employee during a given period of time with experience is referred to as employee productivity.
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