A visual challenge, the 'Spot the 409' test, requires participants to find a single '409' amidst numerous '406's within seven ...

This article is a fun and engaging optical illusion challenge that tests readers’ observation skills. It presents a grid ...

Test your visual acuity with a challenging hidden object puzzle! Six items are cleverly concealed within an ordinary scene, ...

The Regulatory Citation and How It Applies: “Research that only includes interactions involving educational tests (cognitive, diagnostic, aptitude, achievement), survey procedures, interview ...