Validation of a usability assessment instrument according to the evaluators’ perspective about the users’ performance
- Resource Type
- Original Paper
- Authors
- Martins, Ana Isabel; Queirós, Alexandra; Rocha, Nelson Pacheco
- Source
- Universal Access in the Information Society: International Journal. 19(3):515-525
- Subject
- Technologies for ageing in place
Usability assessment
International classification of functioning
Disability and health
ICF based Usability Scale
Scale validation
- Language
- English
- ISSN
- 1615-5289
1615-5297
Technologies for ageing in place may help older adults in their homes to overcome multiple impairments and to promote their autonomy and independence. When conceptualizing technologies for ageing in place, the International Classification of Functioning, Disability and Health (ICF) is a key element due to its functioning and disability framework with consolidated concepts and terminologies. Based on the ICF conceptual framework, the article presents the ICF based Usability Scale (ICF-US) to evaluate the usability of technologies for ageing in place and reports a study aiming: (1) to validate the ICF-US to evaluate usability according to the evaluators’ perspective about the users’ performance and (2) to evaluate the utility and applicability of the ICF-US. Two observational studies evolving 184 participants were conducted to: (1) assess the validity and reliability of the ICF-US to evaluate usability according to the evaluators’ perspective about the users’ performance and (2) to verify the utility and applicability of the ICF-US. The results suggest that the ICF-US is valid and reliable and can be used in different stages of technological developments without losing its discriminatory capacity.