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Correlations among prototypical usability metrics: evidence for the construct of usability

by: Jeff Sauro, and James R. Lewis

In: CHI '09: Proceedings of the 27th international conference on Human factors in computing systems New York, NY, USA: ACM (2009) , p. 1609--1618.

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URL:	http://portal.acm.org/citation.cfm?id=1518701.1518947&coll=portal&dl=ACM&CFID=48611422&CFTOKEN=37599904
DOI:	10.1145/1518701.1518947

Correlations between prototypical usability metrics from 90 distinct usability tests were strong when measured at the task-level r between .44 and .60. Using test-level satisfaction ratings instead of task-level ratings attenuated the correlations r between .16 and .24. The method of aggregating data from a usability test had a significant effect on the magnitude of the resulting correlations. The results of principal components and factor analyses on the prototypical usability metrics provided evidence for an underlying construct of general usability with objective and subjective factors.

Description

Correlations among prototypical usability metrics

BibTeX record

@inproceedings{1518947,
  abstract = {Correlations between prototypical usability metrics from 90 distinct usability tests were strong when measured at the task-level (r between .44 and .60). Using test-level satisfaction ratings instead of task-level ratings attenuated the correlations (r between .16 and .24). The method of aggregating data from a usability test had a significant effect on the magnitude of the resulting correlations. The results of principal components and factor analyses on the prototypical usability metrics provided evidence for an underlying construct of general usability with objective and subjective factors.},
  added-at = {2009-08-24T11:13:45.000+0200},
  address = {New York, NY, USA},
  author = {Sauro, Jeff and Lewis, James R.},
  biburl = {http://www.bibsonomy.org/bibtex/277944b9a89bb366ca9d2046929e8398c/ewomant},
  booktitle = {CHI '09: Proceedings of the 27th international conference on Human factors in computing systems},
  description = {Correlations among prototypical usability metrics},
  doi = {http://doi.acm.org/10.1145/1518701.1518947},
  interhash = {8f2b15d37183f0fbc9785404e37044a6},
  intrahash = {77944b9a89bb366ca9d2046929e8398c},
  isbn = {978-1-60558-246-7},
  keywords = {statistics theory usabulity},
  location = {Boston, MA, USA},
  pages = {1609--1618},
  publisher = {ACM},
  timestamp = {2009-08-24T11:13:45.000+0200},
  title = {Correlations among prototypical usability metrics: evidence for the construct of usability},
  url = {http://portal.acm.org/citation.cfm?id=1518701.1518947&coll=portal&dl=ACM&CFID=48611422&CFTOKEN=37599904},
  year = 2009
}

Endnote record

%0 Conference Paper
%1 1518947
%A Sauro, Jeff
%A Lewis, James R.
%B CHI '09: Proceedings of the 27th international conference on Human factors in computing systems
%@ 978-1-60558-246-7
%C New York, NY, USA
%D 2009
%I ACM
%K 
%P 1609--1618
%T Correlations among prototypical usability metrics: evidence for the construct of usability
%R http://doi.acm.org/10.1145/1518701.1518947
%U http://portal.acm.org/citation.cfm?id=1518701.1518947&coll=portal&dl=ACM&CFID=48611422&CFTOKEN=37599904
%X Correlations between prototypical usability metrics from 90 distinct usability tests were strong when measured at the task-level (r between .44 and .60). Using test-level satisfaction ratings instead of task-level ratings attenuated the correlations (r between .16 and .24). The method of aggregating data from a usability test had a significant effect on the magnitude of the resulting correlations. The results of principal components and factor analyses on the prototypical usability metrics provided evidence for an underlying construct of general usability with objective and subjective factors.