## 3 Results
### Between-Subjects Analysis
#### 3.2.2 Subjective Evaluation Using Questionnaires  
Descriptive statistics--The sample of all participants in June (\(N\) = 46) shows a similar trend to the smaller sample. This means that the highest satisfaction in June belonged to satisfaction with 'A-job' (\(M\) = 2.4, \(SD\) = 1.87). After that, daylight (both annually: 'A-Natural', and moment: 'Natural') with (\(M\) = 2.9, \(SD\) = 1.75 and \(M\) = 2.8, \(SD\) = 1.72) and 'Glare artificial' (\(M\) = 2.8, \(SD\) = 1.6) had the highest satisfaction rates. For more details, see Table 8.  
Correlation analysis--The correlation of all fifteen satisfaction variables was explored by calculation of Pearson correlation coefficients, and only significant correlations are reported here. The results of correlation analysis for the larger samples (\(N\) = 46 and \(N\) = 61) show that there were'very strong' (\(0.8<p<1\)) degrees of correlations for all the variables between annual and at the moment variables. Similarly, for the smaller samples (\(N\) = 10 for both studies in June and October), the highest correlation was found for 'Glare artificial light'. For daylight (A-Natural vs. Natural), a correlation was found only for June in both small and large samples. For more details, see Table 9.  
All the samples consistently showed the strongest correlation between 'Light quality' and 'Light desk' for both annual and moment situations. For the large sample in June (\(N\) = 46), all correlations of the variables for the moment situation were stronger than the same annual situation. For example, the correlation of 'Light desk' with 'Light quality' was (\(r\) = 0.87, \(p<0.01\)), and the correlation of 'A-Light desk' with 'A-Light quality' was (\(r\) = 0.85, \(p<0.01\)). Both daylight and artificial light seem to contribute to the user assessments of the light quality in the room, with the correlation between 'Artificial light' and 'Lightting \begin{table}
\begin{tabular}{c c} \hline \hline
**Variable** & **Mean \(\pm\) Std. Deviation (JUNE, \(N\) = 46)** \\ \hline A-Light Desk & 3.0 \(\pm\) 1.56 \\ A-Natural & 2.9 \(\pm\) 1.75 \\ A-Artificial & 3.3 \(\pm\) 1.71 \\ A-Glare Sun & 3.4 \(\pm\) 1.76 \\ A-Glare Artificial & 3.0 \(\pm\) 1.72 \\ A-View & 3.3 \(\pm\) 2.23 \\ A-Lighting Quality & 3.3 \(\pm\) 1.42 \\ A-Overall IEQ & 3.4 \(\pm\) 1.60 \\ A-Job & 2.4 \(\pm\) 1.87 \\ Light Desk & 3.0 \(\pm\) 1.63 \\ Natural & 2.8 \(\pm\) 1.72 \\ Artificial & 3.1 \(\pm\) 1.66 \\ Glare Sun & 3.3 \(\pm\) 1.72 \\ Glare Artificial & 2.8 \(\pm\) 1.59 \\ Lighting Quality & 3.0 \(\pm\) 1.61 \\ Valid N (listwise) & 46(42) \\ \hline \hline \end{tabular}
\end{table} 
Table 8: Descriptive statistics analysis of all 15 satisfaction variables (1 = very satisfactory, 7 = very unsatisfactory). \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Annual/Moment Variables** & **POE1-Oct. (N = 10)** & **POE2-Jun. (N = 10)** & **Jun. (N = 46)** & **Oct. + Jun. (N = 61)** \\ \hline A-Light Desk vs. Light Desk & 86 ** & 68 ** & 84 ** & 84 ** \\ A-Natural vs. Natural & not significant & 78 ** & 87 ** & 80 ** \\ A-Artificial vs. Artificial & 88 ** & 84 ** & 86 ** & 86 ** \\ A-Glare Sun vs. Glare Sun & 81 ** & 95 ** & 87 ** & 85 ** \\ A-Glare Artificial vs. Glare Artificial & 97 ** & 92 ** & 89 ** & 89 ** \\ A-Light Quality vs. Light Quality & 94 ** & 71 * & 86 ** & 87 ** \\ \hline \hline \end{tabular}
\end{table} 
Table 9: Correlation analysis for variables between ’annual’ and ’at the moment’. quality' (\(r\) = 0.81, \(p\) < 0.01) being slightly higher than the correlation between 'Natural light' and 'Lighting quality' (\(r\) = 0.77, \(p\) < 0.01). Both sources of glare also contributed to the assessments of the lighting quality in June with the same weight (\(r\) = 0.71, \(p\) < 0.01). Unlike in October, when the assessments of the amount of light on the desk area ('Light desk') seem to only be linked to the amount and quality of artificial lighting, in June, both light sources seem to have contributed to the assessments of the 'Amount of light on desk area'.