Lyam Bailey, who studies neuroscience and psychology at Dalhousie University, in a 2020 interview, said that this isn’t an accident. He described it as a “widespread convention” that stems from the idea that left-handed people will “mess up” the data. Neuroimaging brain research uses magnetic resonance imaging (MRI or fMRI) to capture pictures of active regions of the brain. ⁠ ⁠ Researchers want subjects that are comparable to each other so they can average their data and draw conclusions about whatever variable they are looking at. But lefties’ brains are different enough that researchers wish to exclude them to reduce data irregularities.⁠ The brain is divided into two hemispheres that aren’t perfectly symmetrical in form or function. Because of this lateralization, some brain functions are dominated by one-half, especially when it comes to motor skills and language processing.⁠ ⁠ _____⁠ ⁠ In the 1800s, researchers discovered that the right brain hemisphere controls the left side of ...