Cognitive psychology for Mathix and Math-x

Cognitive requirements Few cognitive elements
Comprehensable cognitive elements
Cognitive structure of elements
User task requirements Input tasks
Identification tasks
Search tasks (visual, cognitive)
Procedural tasks (algoritmic, heuristic)
Attention tasks (monitoring processes)
Control tasks (update, progress, attention, window)
Resources and examples See http://www.humanefficiency.nl/designers_understanding.shtml