[2 marks] 1 1 Briefly evaluate research using split brain patients to investigate hemispheric lateralisation of function. (tes.com)
This is called the Homo loquens hypothesis: lateralisation in general was driven by the evolution of an upright, bipedal stance, while the rightward preference was driven, some time later, by the evolution of language. (entrepreneur.com)
Lateralisation of limb use — that is, a bias towards one side or the other — usually begins in the brain. (entrepreneur.com)