Which of the following statements is incorrect? 

a- The terms 'Great' and 'Little' traditions were coined by Robert Redfield to describe the cultural practices of urban societies.
b- Both great and little traditions changed over time, through a process of interaction.

Only statement b is correct.

Correct statement a- The terms 'Great' and 'Little' traditions was coined by Robert Redfield to describe the cultural practices of peasant societies.