title: Comparing two types of engineering visualizations: task-related manipulations matter.
abstract: This study focuses on the comparison of traditional engineering drawings with a CAD (computer aided design) visualization in terms of user performance and eye movements in an applied context. Twenty-five students of mechanical engineering completed search tasks for measures in two distinct depictions of a car engine component (engineering drawing vs. CAD model). Besides spatial dimensionality, the display types most notably differed in terms of information layout, access and interaction options. The CAD visualization yielded better performance, if users directly manipulated the object, but was inferior, if employed in a conventional static manner, i.e. inspecting only predefined views. An additional eye movement analysis revealed longer fixation durations and a stronger increase of task-relevant fixations over time when interacting with the CAD visualization. This suggests a more focused extraction and filtering of information. We conclude that the three-dimensional CAD visualization can be advantageous if its ability to manipulate is used.
authors.affiliation: Institute for Psychology III, Unit of Engineering Psychology and Cognitive Ergonomics, Technische Universität Dresden, Helmholtzstrasse 10, 01069 Dresden, Germany. coelln@psychologie.tu-dresden.de
authors.forename: Martin C
authors.initials: MC
authors.lastname: Cölln
authors.forename: Kerstin
authors.initials: K
authors.lastname: Kusch
authors.forename: Jens R
authors.initials: JR
authors.lastname: Helmert
authors.forename: Petra
authors.initials: P
authors.lastname: Kohler
authors.forename: Boris M
authors.initials: BM
authors.lastname: Velichkovsky
authors.forename: Sebastian
authors.initials: S
authors.lastname: Pannasch
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D003071:Cognition / Q000502:physiology; D017076:Computer-Aided Design; D005133:Eye Movements / Q000502:physiology; D005260:Female; D006801:Humans; D007089:Image Enhancement; D008297:Male; D010364:Pattern Recognition, Visual / Q000502:physiology*; D013647:Task Performance and Analysis; D014584:User-Computer Interface; D055815:Young Adult