#1. The Stroop Test: Great brain teaser to challenge your mental vitality and flexibility

Ready to test your men­tal vital­i­ty and flexibility?

Quick — say aloud what col­or you see in every word, NOT the word you read.

Go from left to right, from top to down. Ready. Set. Go!

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Not easy, right? This task is called the Stroop Test, and is used in neu­ropsy­cho­log­i­cal eval­u­a­tions to mea­sure men­tal vital­i­ty and flex­i­bil­i­ty, since per­form­ing well requires strong atten­tion, inhi­bi­tion and self-reg­u­la­tion capa­bil­i­ty (also called exec­u­tive func­tions).

Next brain teas­er in Sharp­Brains’ top 25 series:

• #2. You say you can count? Check out this brief atten­tion experiment