# Why are some people right (or left) handed?

An episode of [What's That Rash?](https://invisiblenetwork.ai/podcast/1501500390), 7 Apr 2026, 19 min.

Audio: https://mediacore-live-production.akamaized.net/audio/02/j7/Z/k1.mp3

What determines whether you’re right or left handed? Is there really such a thing as being ambidextrous? It’s a surprisingly complicated story, and culture comes into play – some people are forced to go against their dominant hand. Norman and Tegan parse through the history of handedness in this live recording at the World Science Festival Brisbane. References: • A large-scale population study of early life factors influencing left-handedness • The handedness of Kerrs and Carrs • The association between switching hand preference and the declining prevalence of left-handedness with age • Stuttering and “Retraining” Left-Handed Children in Mid-Century U.S. • Can training to become ambidextrous improve brain function? • Brain Size Associated with Foot Preferences in Australian Parrots • The Influence of Handedness on the Clinical Presentation and Neuropsychology of Alzheimer Disease If you enjoyed this episode, check these out! • Can sudoku really keep your brain younger for longer? • Should you train cardio and strength on the same day? • The four steps you need to form a habit

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