ICF based Usability Scale: evaluating usability according to the evaluators' perspective about the users' performance

Abstract

The ICF based Usability Scale (ICF-US) is a generic usability evaluation scale based on the conceptual model of the International Classification of Functioning, Disability and Health (ICF) and consists of two subscales. This usability evaluation instrument is part of a comprehensive framework for the design, development and evaluation of Ambient Assisted Living (AAL) products and services for older adults. The ICF-US has been previously validated for self-perceived usability. The aims of the study reported in this paper were to verify if ICF-US is also suitable for usability evaluation of AAL products or services considering the opinion of the evaluators about the users. The results indicate that the ICF-US can be useful tool for usability evaluation of AAL products or services based on the evaluators' perspective about the users' performance.