Answer:
If they gave the same ratings alone as they do in a group.
Step-by-step explanation:
The Conformity theory is referred to as a type of social influence that involves a change in belief or behaviour in order to fit in with a group.
This change can either be in response to real (involving the physical presence of others) or imagined (involving the pressure of social norms / expectations) group pressure.
Private conformity occurs when people truly believe that the group is right. They still believe the group is right even in the absence of group members.
While Public conformity occurs when we are pressured and feel we do not have a choice other than to conform or agree to group norms. This usually occurs before group members.
From the question context, if they gave the same ratings when they are alone and in a group, then we would say that private conformity has occurred.