Left brain / right brain people

Creative people are right-brained; analytic people are left-brained.

What actually happened

No evidence of individual hemispheric dominance in over 1,000 brain scans (Nielsen et al., 2013). Lateralisation of specific functions is real; personality types based on it are not.

What to do instead

Nothing to apply. Discard the frame entirely.

The laws that do this job properly

F·08Four Things, Not SevenWorking memory holds about four items. Everything past that is being dropped while you believe you are still holding it.proven
F·12Boredom Is Where the Idea ArrivesFor a problem you have already worked on, an undemanding task beats both rest and more effort.solid
L·03InterleavingMixing problem types during practice feels worse and performs better than doing them in blocks.proven

Every law on Useful Mind tells you how strong the evidence behind it is. The ones that failed are kept here rather than quietly deleted, because knowing which advice is wrong saves you as much as knowing which is right.

See the ones that held up