. Author manuscript; available in PMC: 2011 Aug 2.

Published in final edited form as: Ergon Des. 2009 Jan 1;17(1):20–28. doi: 10.1518/106480409X415170

Table 6.

Predictive Klm-Based Models for Two Sign-Out Tasks

Keystroke-Level Model	Tool	Predictive Equation	Total Time (seconds)
Add patient	Spreadsheet	T_execute = 8T_p + 16T_B + 4T_H + 5T_K	13.4
Add patient	Prototype	T_execute = 3T_p + 4T_B + T_H + T_K	4.4
Modify footer	Spreadsheet	T_execute = 9T_p + 14T_B + 2T_H + T_K	12.4
Modify footer	Prototype	T_execute = 3T_p + 6T_B + 2T_H + T_K	5.0

Note. T_P (move mouse to a point) = 1.1 seconds; T_B (time to press or release mouse button) = 0.1 seconds; T_H (time to home hands to keyboard or mouse) = 0.4 seconds; T_K (time to press a key on the keyboard) = 0.28 seconds.