Simplify the following text for a Grade 10 native English-speaking person.
Original: In this way , cross-cultural psychology together with international psychology aims to make psychology less ethnocentric in character than it has hitherto been . Cross-cultural psychology is now taught at numerous universities located around the world , both as a specific content area as well as a methodological approach designed to broaden the field of psychology .
Simplified: Cross-cultural psychology is the study of the difference cultures can have on psychology .