What were the two main sources of support for artists in ancient greece

John Atkinson claimed that one's strength of motivation to succeed, incentive value of success, and perceived probability of success influenced one's need for achievement. For example, if desire to succeed is high, then individuals are more likely to pursue a challenge or goal. If an individual believes the probability of success is high, one is also more likely to pursue a goal or challenge. Finally, if one believes that the goal is valuable in some way or is important to an individual, pursuit of a goal will increase as well.

Explanation:

hope this helps!