ACM - affordances
Alex Paul Conn
Proceedings of the SIGCHI conference on Human factors in computing systems - CHI ’95
See chapters 3 and 5 in particular
Response time and display rate in human performance with computers
Enhancing the explanatory power of usability heuristics
Estimating the relative usability of two interfaces
The importance of percent-done progress indicators for computer-human interfaces
Towards a model of user perception of computer systems response time