title: Combining situated Cognitive Engineering with a novel testing method in a case study comparing two infusion pump interfaces.
abstract: We validated the usability of a new infusion pump interface designed with a situated Cognitive Engineering approach by comparing it to a reference interface using a novel testing method employing repeated measurements and process measures, in addition to traditional outcome measures. The sample consisted of 25 nurses who performed eight critical tasks three times. Performance measures consisted of number and type of errors, deviations from a pre-established normative path solution, task completion times, number of keystrokes, mental effort and preferences in use. Results showed that interaction with the new interface resulted in 18% fewer errors, 90% fewer normative path deviations, 42% lower task completion times, 40% fewer keystrokes, 39% lower mental effort and 76% more subjective preferences in use. These outcomes suggest that within the scope of this case study, combining the situated Cognitive Engineering approach with a novel testing method addresses various shortcomings of earlier testing methods.
authors.affiliation: Department of Cognitive Psychology and Ergonomics, Faculty of Behavioural, Management and Social Sciences, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. Electronic address: raphaela.schnittker@monash.edu.
authors.forename: R
authors.initials: R
authors.lastname: Schnittker
authors.affiliation: Department of Cognitive Psychology and Ergonomics, Faculty of Behavioural, Management and Social Sciences, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. Electronic address: m.schmettow@utwente.nl.
authors.forename: M
authors.initials: M
authors.lastname: Schmettow
authors.affiliation: Institute for Engineering and Design, Utrecht University of Applied Sciences, P.O. Box 182, 3500 AD Utrecht, The Netherlands. Electronic address: fenne.verhoeven@hu.nl.
authors.forename: F
authors.initials: F
authors.lastname: Verhoeven
authors.affiliation: Department of Cognitive Psychology and Ergonomics, Faculty of Behavioural, Management and Social Sciences, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; Department of Human Behaviour and Organisational Innovation, TNO Earth, Life and Social Sciences, P.O. Box 23, 3969 ZG Soesterberg, The Netherlands. Electronic address: j.m.c.schraagen@utwente.nl.
authors.forename: J M C
authors.initials: JMC
authors.lastname: Schraagen
mesh_terms: D000328:Adult; D003071:Cognition; D004867:Equipment Design / Q000523:psychology*; D006804:Ergonomics / Q000379:methods*; D005260:Female; D006801:Humans; D007260:Infusion Pumps / Q000523:psychology*; D008297:Male; D008875:Middle Aged; D009726:Nurses / Q000523:psychology; D013647:Task Performance and Analysis; D014584:User-Computer Interface
keywords: Human-machine interaction; Infusion pump; Medical device usability testing