If one of your A2 Psychology Unit 4 options is Language and Thought, then this new research into the process of language acquisition may be useful. The study by Judit Gervain, a post-doctoral fellow  at the University of British Columbia, and a team of researchers from Italy and Chile, could explain why "daddy" and "mommy" are often a baby's first words – the human brain may be hard-wired to recognize certain repetition patterns.