2.1.4.1. Outcome measure.
Participants had to fill in thermal com-fort surveys every 10 min. They were handed the sheets by theexperimenter who collected them upon completion. The questionscorrespond to the ASHRAE standard scales for thermal comfort[37]. The five questions differ as to the aspect of the judge-ment (e.g. evaluative, preferential, localized, present, future, etc.)and to the object of the judgement (e.g. environment or per-son). The first three questions assess how the participants feel,distinguishing ‘between perception, present affective assessment(comfort/discomfort) and future preference’. The last two questionsassess how participants judge the local environment, distinguish-ing between personal acceptability and tolerance. Table 2 showsthe questions and answer scales of the survey, and specifies in theparentheses which aspect of comfort is assessed.Annex B of the respective standard [37] gives guidance on dataanalysis and interpretation of results: the five survey questions areto be analysed separately as they assess different aspects of the sub-jective judgement. In addition, a review showed that when usingthe five survey questions as an indirect measure of acceptabilityof the thermal conditions, very different estimates resulted fromthe different questions, supporting the notion that the questionsmeasure different aspects of thermal comfort [7].