Two push factors that caused african americans to leave the south in the south in the early 1900s were

Segregation and low wages

Explanation:

Between the period of 1910 to 1930, there was a migration movement called the Great Migration that made millions of African Americans move from the Southern States to the North and West, it is estimated that 6 million African Americans relocated during this period.

The main reason for the Great Migration was that the Southern States limited African Americans rights which made living very difficult, African Americans could not buy property, marry, vote and other things. 

the psychological impact of incarceration

explanation:

a brief interference with a person's freedom of movement with a duration that can be measured in minute.