Original sentence: Once the subjects had done this, the experimenters asked some of them to do a simple favor.Some participants were paid $20 for this favor, another group was paid $1, and a control group was not asked to perform the favor.Those in the $20 condition, however, had an obvious external justification for their behavior, and thus experienced less dissonance
Edited sentence: Once the subjects had done this, the experimenters asked some of them to do a simple favour.Some participants were paid $20 for this favor, another group was paid $1, and a control group was not asked to perform the favour.Those in the $20 condition, however, had an obvious external justification for their behaviour, and thus experienced less dissonance