title: Combined effects of acoustic and visual distraction on cognitive performance and well-being.
abstract: Information work is usually performed in offices and influenced by the combined effects of acoustics, room climate, lighting and air quality. However, the principal part of literature solely focuses on the individual effects of physical parameters. This study (n = 32) investigates the combined effects of acoustic and visual distraction with regard to cognitive performance and well-being. Therefore low level background speech (40 dB(A)) of good or poor intelligibility was combined with either static or dynamic lighting. Experimental testing lasted for approx. 7 h for each participant and was conducted in mock-up offices. No interaction effects of background speech and lighting conditions with regard to cognitive performance were found. However, the results prove that even low level background speech of high intelligibility significantly impairs short-term memory, reasoning ability and well-being. But no effect of background speech on text comprehension and sustained attention was found. Visual distraction due to dynamic lighting caused significant complaints but did not impair performance. An interaction effect of background speech and lighting conditions was found with regard to perceived performance during task processing. Test persons only felt to perform better, if background speech of low intelligibility was combined with static lighting. It is shown that the effects on cognitive performance and well-being must be considered separately since these effects are rarely consistent.
authors.affiliation: Fraunhofer Institute for Building Physics, Fraunhofer Gesellschaft, Germany. andreas.liebl@ibp.fraunhofer.de
authors.forename: Andreas
authors.initials: A
authors.lastname: Liebl
authors.forename: Jörg
authors.initials: J
authors.lastname: Haller
authors.forename: Bernd
authors.initials: B
authors.lastname: Jödicke
authors.forename: Herwig
authors.initials: H
authors.lastname: Baumgartner
authors.forename: Sabine
authors.initials: S
authors.lastname: Schlittmeier
authors.forename: Jürgen
authors.initials: J
authors.lastname: Hellbrück
mesh_terms: D000328:Adult; D003071:Cognition; D005260:Female; D005858:Germany; D006801:Humans; D008297:Male; D009623:Noise, Occupational / Q000009:adverse effects*; D010549:Personal Satisfaction; D011795:Surveys and Questionnaires; D013647:Task Performance and Analysis; D014785:Vision, Ocular; D055815:Young Adult