Check out the Questionnaire for User Interface Satisfaction at:

http://lap.umd.edu/QUISFolder/quisHome.html

The original article:
Davis, F. D. Perceived usefulness, perceived ease of use, and user
acceptance of information technology. MIS Quarterly, 13, pp. 318-339,
1989.

Lewis (Lewis, J. (1995) IBM Computer Usability Satisfaction
Questionnaires: Psychometric Evaluation and Instructions for Use,
International Journal of Human-Computer Interaction, Vol. 7 No. 1 pp.
57-78) reviewed current psychometric instruments.  He considered the
reliability of a questionnaire as a quantitative assessment of its
consistency.  Coefficient alpha can range from 0 (no reliability) to 1
(perfect reliability).  Measures that can effect an individuals future,
say an IQ test, should have a minimum reliability of .90.  For other
research or evaluation measurement , reliability should be .70 to .80. 
Lewis rated the overall consistency of the QUIS as .94.


http://www.psycho.uni-osnabrueck.de/ggediga/www/isometr2/profil.html

http://www.ucc.ie/hfrg/sumi/