Notes on interaction design

Attention, memory, perception, learning, language and decision-making — the processes and mental models that decide how users meet an interface.

Gathering, prioritising and validating what a design actually has to do — before a single screen gets drawn.

Privacy, security, protocols, hardware limits, network drops and the adaptive-vs-responsive question: the constraints that shape a mobile design.

Lean UX as the working method, plus seven principles — functionality, content, context, usability, consistency, help and feedback.

Testing the prototype against real users and real goals — how to know whether a design actually works.