"what should a developer know about interface design, usability and user psychology to create great software? " Code Answer

useful and effective interfaces are beautiful. look at them as a ui designer, not as an art major. :-)

simplicity; as few choices as can accomplish the needs.
convention; follow patterns the users are already familiar with.
observation; watch the users, and smooth the places they have problems.
gentleness; write human-readable errors. don't upset the users.
consistency; do things the same way everywhere in the application. have one person write all of your text, or write a standard that text must meet.

By Ali.M on April 9 2022