Simplify the following text for a Grade 11 native English-speaking person.
Original: Alongside Melanie Klein , she may be considered the founder of psychoanalytic child psychology : as her father put it , child analysis ` had received a powerful impetus through `` the work of Frau Melanie Klein and of my daughter , Anna Freud '' ' .
Simplified: With Melanie Klein , she may be considered the founder of psychoanalytic child psychology . As her father put it , child analysis had received a powerful impetus through `` the work of Frau Melanie Klein and of my daughter , Anna Freud '' .