LiTG Questionnaire for the evaluation of lighting situationsLiTG Fragebogen zur Bewertung von LichtsituationenLiTG-Fragebogen zur Bewertung von Lichtsituationen

Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

FACHGEBIET BAUPHYSIK UND TECHNISCHER AUSBAU (fbta)

KIT – Universität des Landes Baden-Württemberg undnationales Forschungszentrum in der Helmholtz-Gemeinschaft www.kit.edu

Overview

Background of LiTG Questionnaire

Why bother about questionnaires?

Collection of questionsq

A few words on scales, lab studies and field studies

LiTG Questionnaire

Fachgebiet Bauphysik und Technischer Ausbau (fbta)2 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

Background of „LiTG Questionnaire“

German Lighting Society Deutsche Lichttechnische Gesellschaft e.V. LiTG

the Management Board elects / der Vorstand wählt

technical and scientific committeetechnical and scientific committee Technisch-wissenschaftlicher Ausschuss TWA

establishes / setzt einestablishes / setzt ein

expert forum interior lighting EFI (18 members, Prof. P. Schmits) Expertenforum Innenbeleuchtung EFI (18 Mitglieder, Prof. P. Schmits)p g ( g , )

Fachgebiet Bauphysik und Technischer Ausbau (fbta)3 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

Background of „LiTG Questionnaire“

EFI task group „questionnaires“EFI Arbeitsgruppe „Fragebögen“

members of task group „questionnaires“ Cornelia Vandahl, TU IlmenauCornelia Moosmann, Karlsruhe Institut of TechnologyCornelia Moosmann, Karlsruhe Institut of TechnologyBirthe Tralau, Zumtobel LightingNils Haferkemper, TU Darmstadt/Photometrik GmbH

Fachgebiet Bauphysik und Technischer Ausbau (fbta)4 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

Why bother about questionnaires?

Interest in qualitative evaluation of lighting situations

S r e s ith test s bjects are req ired for the definition of meaningf lSurveys with test subjects are required for the definition of meaningful indicators as well as holistic assessments.

Questionnaires are measuring devices!Questionnaires are measuring devices!must include all relevant questionsshould not include dispensable questionsquestions must be easy to understandq y

Does the questionnaire meet the requirements?does it work?calibration?comparability of results?

Fachgebiet Bauphysik und Technischer Ausbau (fbta)5 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

Collection of questions

Collection of tried questions from several surveysLight Technology Group, TU IlmenauLight Technology Group TU BerlinLight Technology Group, TU BerlinZumtobel LightingBuilding Science Group, Karlsruhe Institute of Technology KITInstitute of Hygiene and Applied Physiology, ETH ZurichCenter for the Built Environment, University of California, Berkeley, US

Particular interest inusers’ sensationusers’ acceptanceusers’ preference

Fachgebiet Bauphysik und Technischer Ausbau (fbta)6 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

A question of scales...

check boxes or lines?

odd or even?

Fachgebiet Bauphysik und Technischer Ausbau (fbta)7 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

Laboratory studies and field studies

lab studiesdetailed analysis of specific aspectssubjects are paid for doing tests and answering questionssubjects are paid for doing tests and answering questionssubjects have enough timelonger questionnaires possible 7-point-scales recommended

field studies“real life” with disturbing variablessubjects/companies usually unpaid subjects have only little timeshort questionnairesshort questionnaires5-point-scales recommended (preferred by subjects, according to literature)possibility to tick “not specified”

Fachgebiet Bauphysik und Technischer Ausbau (fbta)8 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

LiTG Questionnaire – a few brief words

25 questions, about 10 minutes to answer

The Questionnaire must be adapted to specific survey!

Personal data of subjects such as age (in years or year of birth), sex, j g ( y y ), ,goggles, should always be collected.

Especially in field studies some data should be collected by theEspecially in field studies, some data should be collected by the investigator, to keep the questionnaire short and to make sure that the data is determined in an appropriate way:

spatial conditions (i.e. window size, kind of illumination) p ( , )orientation of a space (compass)dimensionsphotometric quantities

Fachgebiet Bauphysik und Technischer Ausbau (fbta)9 25.09.2015

photometric quantities

Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

LiTG Questionnaire

information for subjects

general questions on subjects’ well-being, spatial impression, satisfaction with natural and artificial lighting

Fachgebiet Bauphysik und Technischer Ausbau (fbta)10 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

LiTG Questionnaire

information for subjects

general questions on subjects’ well-being, spatial impression, satisfaction with natural and artificial lighting

questions on brightness q g(sensation and preference)

... colour of light (sensation and preference)

Fachgebiet Bauphysik und Technischer Ausbau (fbta)11 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

LiTG Questionnaire

information for subjects

general questions on subjects’ well-being, spatial impression, satisfaction with natural and artificial lighting

questions on brightness q g(sensation and preference)

... colour of light (sensation and preference)

... usability, automation (acceptance)

... reflections (sensation and preference)

... glare from daylight, glare from artificial lighting (frequency and acceptance)

Fachgebiet Bauphysik und Technischer Ausbau (fbta)12 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

LiTG Questionnaire

information for subjects

general questions on subjects’ well-being, spatial impression, satisfaction with natural and artificial lighting

questions on brightness q g(sensation and preference)

... colour of light (sensation and preference)

... usability, automation (acceptance)

... reflections (sensation and preference)

... glare from daylight, glare from artificial lighting (frequency and acceptance)

“final questions”: view, flicker,

Fachgebiet Bauphysik und Technischer Ausbau (fbta)13 25.09.2015

final questions : view, flicker,satisfaction with lighting situation

Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl

LiTG Questionnaire – general information

background, information, hints

You are welcome to use the questionnaire! You find it on the conference CD.

Please inform us about your study and your experiences with the questions.

Don’t hesitate to ask!

Fachgebiet Bauphysik und Technischer Ausbau (fbta)14 25.09.2015 Dr.-Ing. Cornelia Moosmann, Dr.-Ing. Cornelia Vandahl