Simplify the following text for a Grade 7 native English-speaking person.
Original: The name Alex is an acronym for Avian Language EXperiment , but Pepperberg later cited the name as meaning Avian Learning EXperiment to evoke further acceptance in her research field , a then touchy topic ( explained in her book , Alex & Me ) .
Simplified: Alex 's name is an acronym . ALEX is short for Avian Learning EXperiment .