By a News Reporter-Staff News Editor at Health & Medicine Week -- Investigators discuss new findings in Clinical Research. According to news originating from Aveiro, Portugal, by NewsRx correspondents, research stated, "Computer screen videos (CSVs) and users' facial expressions videos (FEVs) are recommended to evaluate systems performance. However, software combining both methods is often non-accessible in clinical research fields."
Our news journalists obtained a quote from the research from the University of Aveiro, "The Observer-XT software is commonly used for clinical research to assess human behaviours. Thus, this study reports on the combination of CSVs and FEVs, to evaluate a graphical user interface (GUI). Eight physiotherapists entered clinical information in the GUI while CSVs and FEVs were collected. The frequency and duration of a list of behaviours found in FEVs were analysed using the Observer-XT-10.5. Simultaneously, the frequency and duration of usability problems of CSVs were manually registered. CSVs and FEVs timelines were also matched to verify combinations. The analysis of FEVs revealed that the category most frequently observed in users behaviour was the eye contact with the screen (ECS, 32 +/- 9) whilst verbal communication achieved the highest duration (14.8 +/- 6.9 min). Regarding the CSVs, 64 problems, related with the interface (73%) and the user (27%), were found. In total, 135 usability problems were identified by combining both methods. The majority were reported through verbal communication (45.8%) and ECS (40.8%). 'False alarms' and 'misses' did not cause quantifiable reactions and the facial expressions problems were mainly related with the lack of familiarity (55.4%) felt by users when interacting with the interface. These findings encourage the use of Observer-XT-10.5 to conduct small usability sessions, as it identifies emergent groups of problems by combining methods."
According to the news editors, the research concluded: "However, to validate final versions of systems further validation should be conducted using specialized software."
For more information on this research see: Usability testing of a respiratory interface using computer screen and facial expressions videos. Computers in Biology and Medicine, 2013;43(12):2205-2213. Computers in Biology and Medicine can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Computers in Biology and Medicine - www.elsevier.com/wps/product/cws_home/351)
The news correspondents report that additional information may be obtained from A. Oliveira, University of Aveiro, Inst Elect & Telemat Engn Aveiro IEETA, P-3810193 Aveiro, Portugal. Additional authors for this research include C. Pinho, S. Monteiro, A. Marcos and A. Marques (see also Clinical Research).
Keywords for this news article include: Aveiro, Europe, Portugal, Software, Computers, Clinical Research
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