Switching a multi-column form to a single-column layout cut completion time and lifted finishes ~15.4% in eye-

Switching a multi-column form to a single-column layout cut completion time and lifted finishes ~15.4% in eye-tracking studies.
Multi-column forces a zig-zag scan path; one column gives a single straight line of progress.
— Two columns ▮▮▮▮ vs one column ▮▮▮▮▮ on form completion.
— Caveat: exception is paired fields (city/state) where side-by-side reads as one logical unit.
A straight path finishes more often. Read the number, not the story. [eye-tracking n≈600 · 95%]