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. 2017 Jul 31;12(7):e0181772. doi: 10.1371/journal.pone.0181772

Table 2. Teachers' self-reported satisfaction with the traditional versus bright classroom, combining data before re-modeling, and combining data after re-modeling, based on teacher’s responses, (1[worst]-5[best], Median [IQR]).

Item Combining autumn and winter data before re-modeling (N = 13) Combining spring and summer data after re-modeling (N = 13)
Traditional classroom Bright classroom Pa Traditional classroom Bright classroom Pa
CLASSROOM OVERALL IMPRESSION
    Overall impression of the classroom 3.00 (3.00–3.50) 4.00 (3.50–5.00) 0.041 3.50 (3.00–4.00) 4.00 (3.50–4.50) 0.298
WINDOWS
    Brightness/discomfort from direct light through windows 3.00 (2.50–3.50) 3.00 (2.50–3.25) 0.398 3.00 (2.50–3.50) 3.00 (2.25–3.25) 0.278
CLASSROOM LIGHTING OVERALL
    Overall adequacy of light for vision in the classroom 3.50 (3.50–3.50) 4.00 (3.50–4.00) 0.268 3.50 (3.00–4.00) 4.00 (3.00–4.50) 0.232
    Overall impact of light and glare in the classroom 3.50 (3.00–4.00) 3.00 (3.00–3.50) 0.221 3.50 (2.50–4.00) 3.00 (2.50–3.50) 0.033
    Overall satisfaction with lighting in the classroom 3.50 (3.00–3.50) 3.00 (3.00–3.50) 0.778 3.00 (2.50–3.50) 3.00 (3.00–4.00) 0.941
BLACKBOARD
    Visibility of writing on the blackboard 3.63 (3.50–3.75) 3.88 (3.75–4.38) 0.010 3.88 (3.75–4.00) 4.00 (3.38–4.50) 0.806
    Brightness of light striking the blackboard 3.75 (3.75–4.00) 3.75 (3.50–4.00) 0.317 3.50 (3.25–3.75) 3.75 (3.00–4.00) 0.158
    Impact of glare on reading words on the blackboard 3.50 (3.25–3.75) 3.75 (3.00–4.00) 0.259 3.50 (3.25–4.00) 3.50 (3.00–4.00) 0.436
    Overall satisfaction with blackboard lighting 3.50 (3.00–3.50) 3.00 (2.50–4.00) 0.207 3.50 (3.00–3.50) 3.50 (3.00–4.00) 1.000
STUDENTS’ DESKS
    Adequacy of light for reading at my desk 3.50 (3.00–4.00) 4.00 (3.50–4.00) 0.235 3.50 (3.00–4.00) 4.00 (3.50–4.50) 0.088
    Brightness of light striking my desk 3.50 (3.00–3.50) 3.50 (3.00–3.50) 0.025 3.50 (3.50–4.00) 3.50 (3.50–4.00) 0.373
    Impact of glare on reading material at my desk 4.00 (3.75–4.50) 3.25 (3.00–4.00) 0.038 3.75 (3.00–4.00) 3.50 (2.75–4.00) 0.393
    Overall satisfaction with lighting at my desk 3.50 (3.00–3.50) 3.00 (2.50–3.50) 0.041 3.50 (3.00–4.00) 3.50 (2.50–4.00) 0.888
MISCELLANEOUS LIGHTING
    Visibility of the teacher’s/fellow students’ faces while speaking 4.00 (3.50–4.00) 4.00 (3.50–4.00) 0.822 3.50 (3.50–4.00) 3.50 (3.50–4.00) 0.858
    Distraction during class from visibility of outdoors 4.00 (3.50–4.00) 3.00 (2.50–3.50) 0.020 3.50 (2.50–4.00) 3.00 (2.50–3.50) 0.060
CLASSROOM TEMPERATURE/ NOISE
    Feel the classroom is too hot 3.00 (2.50–3.50) 2.00 (1.50–2.00) 0.019 3.00 (3.00–3.00) 2.00 (1.50–3.00) 0.104
    Feel the classroom is too cold 4.00 (4.00–4.50) 4.50 (4.50–5.00) 0.074 4.00 (3.00–4.50) 4.50 (3.00–5.00) 0.441
    Noisiness of classroom 3.00 (2.50–3.50) 2.50 (2.00–3.00) 0.195 3.00 (3.00–3.00) 3.00 (2.50–3.00) 0.014

Abbreviations: IQR = Inter Quartile Range

a.Wilcoxon signed rank sum test for teacher data were used for comparing the differences between traditional classroom and open classroom.