Final answer:
Group size, unanimity, and task difficulty are the three main factors that impact conformity according to Asch's research.
Step-by-step explanation:
The three main factors that impact conformity according to Asch are group size, unanimity, and task difficulty. Asch found that conformity increased with the number of people in the majority, up to a certain point. Adding more members beyond that point did not increase conformity. Additionally, when the majority was unanimous in their response, conformity rates were higher. Finally, the difficulty of the task at hand also influenced conformity, with more difficult tasks leading to higher levels of conformity.