I did not understand the question and I do not think this a finished question.
I’m not sure if this exactly answers your question, but some eyebrows are raised at his dilemmas (morality tests) because the only people tested were 10-16 year old boys that had never been in the situations that were presented to them. Overall his dilemmas could be a reason why people question his theories. Other than this reason I am not aware of another reason why people would question his stages of moral development.
In a cooperative learning model, everyone succeeds only when the group succeeds. This way, the learners help one another to achieve understanding by positive interdependence.
In other words, since success depends on the participation of all the members, they would ask one another for information, evaluate one another's ideas, and monitor one another's work, thus help one another to achieve understanding.
The Internet as a source of reproductive health information among adolescent girls in an urban city in Nigeria
