Sometimes any change and increased observation of test subjects has a temporary effect even if the subjects are unaware of the reason for the change or the hypo

Sometimes any change and increased observation of test subjects has a temporary effect even if the subjects are unaware of the reason for the change or the hypothesis behind the experiment. Just the attention paid to them can be motivational. https://en.wikipedia.org/wiki/Hawthorne_effect https://en.wikipedia.org/wiki/Hawthorne_effect