In all current and future projects I pledged to concentrate all the ground work around interaction design.
I'm aware of Alan Cooper's work, and it's excellent, but what I'm looking for is a reference work with observed human behavior when confronted with certain visual elements and usage scenarios.
Some kind of "user psychology for developers." Which colors convey which feelings, where is the eye led, and how. How much can a user remember, which approach to take to map the user's mental model onto the interface as closely as possible (or rather the opposite).
I developed a design steps framework in order to work out interaction scenarios and user goals, taking into consideration several factors such as fun, confusion, and fulfilment.
What is lacking is an exhaustive guide to human interaction behavior and perception, so that one doesn't have to rely on one's own (often faulty) intuition.
My goal, basically, is to achieve a rule-testable interaction design framework.