Usability evaluation with screen reader users: a video presentation of the PCTA's experimental setting and rules.

Cognitive Processing
Stefano FedericiMaria Laura Mele

Abstract

In the study entitled "Web usability evaluation with screen reader users: Implementation of the Partial Concurrent Thinking Aloud technique" (Federici et al. 2010), we have proposed a modified protocol of usability evaluation technique for blind users, which integrates the features of the concurrent and the retrospective techniques. This new technique, called partial concurrent thinking aloud (PCTA), while respecting the properties of classic verbal protocols, overcomes the structural interference and the limits of concurrent and retrospective protocols when used with screen reader users. In order to facilitate understanding and acquisition of the PCTA's technique for practitioners and researchers, we have video recorded three different verbal protocols by visualizing five experimental sections. In the first two videos, we have compared a concurrent with a retrospective's verbal protocol of a sighted user, showing the difference of the verbalizations provided by the user in these two conditions. The third video shows the structural interference of the screen reader, during a blind user concurrent thinking aloud. In the last two videos, we show the difference of a blind user behaviour when PCTA or retrospective protocol is adopt...Continue Reading

References

Apr 1, 1995·Psychological Review·K A Ericsson, W Kintsch
Nov 1, 1993·Journal of the Experimental Analysis of Behavior·T S Critchfield

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Citations

Nov 4, 2010·Cognitive Processing·Simone BorsciStefano Federici
Nov 29, 2011·Disability and Rehabilitation. Assistive Technology·Maria Laura Mele, Stefano Federici

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