## 3 Results and Discussion
### Indoor Environmental Quality
For example, the five separate credits of low-emitting materials of LEED-CIv3 (i.e., EQc4.1-EQc4.5, each with one awarding point) were grouped into one credit (EQc2: Low-Emitting Materials) in LEED-CIv4 with three awarding points. It can be suggested \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Credit/Category** & **Country/\(\mathbf{\xi_{1}}\)** & **Possible** & \multicolumn{2}{c}{**Achieved Points**} & \multicolumn{1}{c}{**\(\mathbf{\xi_{2}/\text{ln}\theta}\)**} \\  & & **Points** & **Silver** & **Gold** & \(\mathbf{\xi_{2}/\text{ln}\theta}\) \\ \hline \multirow{3}{*}{EQc1 Enhanced Indoor Air Quality Strategies} & \multirow{3}{*}{China \(\delta_{1}\)} & & 1.0 1.0–2.0 & 2.0 1.0–2.0 & \(\mathbf{-0.40}\) \\  & & & **0.51** & **0.71** & X \\  & & & 1.0 1.0–2.0 & 1.5 1.0–2.0 & 0.01 \\  & & & **0.35** & **0.50** & X \\  & & & 0.0 0.0–2.0 & 1.0 0.0–2.0 & \(\mathbf{-0.05}\) \\ \multirow{3}{*}{EQc2 Low-Emitting Materials} & \multirow{3}{*}{China \(\delta_{1}\)} & & 0.16 & 0.21 & X \\  & & & 1.0 1.0–3.0 & 1.0 0.0–3.0 & _0.16_ \\  & & & 0.30 & 0.28 & X \\ \multirow{3}{*}{EQc3 Construction Indoor Air Quality Management Plan} & \multirow{3}{*}{The U.S. \(\delta_{1}\)} & & 1.0 1.0–1.0 & 1.0 1.0–1.0 & 0.00 \\  & & & 1.0 1.0–1.0 & 1.0 1.0–1.0 & 0.08 \({}^{1}\) \\  & & & **1.00** & **0.92** & X \\  & & & 1.0 0.0–1.0 & 1.0 1.0–2.0 & \(\mathbf{-0.28}\)\({}^{1}\) \\ \multirow{3}{*}{EQc4 Indoor Air Quality Assessment} & \multirow{3}{*}{China \(\delta_{1}\)} & & 0.06 & 0.26 & X \\  & & & 0.0 0.0–1.0 & 0.0 0.0–2.0 & \(\mathbf{-0.26}\) \\  & & & 0.11 & 0.32 & X \\  & & & 0.0 0.0–0.5 & 0.0 0.0–1.0 & \(\mathbf{-0.89}\)\({}^{1}\) \\ \multirow{3}{*}{EQc5 Thermal Comfort} & \multirow{3}{*}{China \(\delta_{1}\)} & & 0.25 & \(\mathbf{0.45}\) & X \\  & & & 0.0 0.0–0.0 & 0.0 0.0–0.0 & \(\mathbf{-0.86}\)\({}^{1}\) \\ \multirow{3}{*}{EQc5 Thermal Comfort} & \multirow{3}{*}{The U.S. \(\delta_{1}\)} & & 0.11 & 0.22 & X \\  & & & 0.0 0.0–1.0 & 1.0 0.0–1.0 & \(\mathbf{-0.37}\) \\  & & & 0.06 & 0.21 & X \\  & & & 1.0 0.0–1.0 & 1.0 0.0–1.0 & \(\mathbf{-0.10}\) \\  & & & 0.11 & 0.22 & X \\  & & & 0.0 0.0–0.0 & 0.0 0.0–2.0 & \(\mathbf{-0.25}\) \\ \multirow{3}{*}{EQc7 Daylight} & \multirow{3}{*}{China \(\delta_{1}\)} & & 0.00 & 0.13 & X \\  & & & 0.0 0.0–0.0 & 0.0 0.0–0.0 & \(\mathbf{-0.08}\) \\ \multirow{3}{*}{EQc8 Quality Views} & \multirow{3}{*}{China \(\delta_{1}\)} & & 0.05 & 0.06 & X \\  & & & 1.0 0.0–1.0 & 1.0 0.0–1.0 & \(\mathbf{0.15}\)\({}^{1}\) \\ \multirow{3}{*}{EQc8 Quality Views} & \multirow{3}{*}{The U.S. \(\delta_{1}\)} & & **0.56** & **0.53** & X \\  & & & 0.0 0.0–1.0 & 1.0 0.0–1.0 & \(\mathbf{-0.84}\)\({}^{1}\) \\ \multirow{3}{*}{EQc9 Acoustic Performance} & \multirow{3}{*}{China \(\delta_{1}\)} & & **0.35** & **0.52** & X \\  & & & 0.0 0.0–0.0 & 0.0 0.0–0.0 & 0.00 \\  & & & 0.00 & 0.00 & X \\  & & & 0.0 0.0–0.0 & 0.0 0.0–0.0 & 0.00 \\  & & & 0.05 & 0.06 & X \\ \multirow{3}{*}{EQ Total} & \multirow{3}{*}{China \(\delta_{1}\)} & & 5.0 4.0–7.0 & 7.0 6.0–8.0 & \(\mathbf{-0.52}\) \\  & & & 0.0 0.0–6.0 & 6.5 4.0–8.0 & \(\mathbf{-0.17}\) \\ \hline \hline \end{tabular}  
* Notes: The \(\delta\) effect size is considered to be (i) negligible if \(|\mathbf{\delta}|<0.147\), (ii) small if \(0.147\lesssim|\mathbf{\delta}|<0.33\), (iii) medium if \(0.33\lesssim|\mathbf{\delta}|<0.474\), and (iv) large if \(|\mathbf{\delta}|\geq 0.474\). \({}^{1}\) The \(\ln\theta\) effect size thresholds are considered to be \(0.51\) (_small_), \(1.24\) (_medium_), and \(1.90\) (large).  
\end{table} 
Table 10: LEED-CIv4 Indoor Environmental Quality (QE) credits category: The median and 25 th–75 th certifies and [PERSON]’s effect size (\(\delta_{1}\)) of the difference between the achieved and the possible points, and (\(\delta_{2}\)) or \(\ln\theta\) of the difference between Silver and Gold projects in China and the U.S.  
that a large number of separately presented credits can allow a much better adaptation of the EQ credits to country-specific environmental concerns.