## 3 Results
### Icon Search Task  
Tables 3-5 summarize the mean and standard deviation of the response times of the independent variables across different levels of time pressure. Each variable consisted of four levels, with each level composed of 400 trials, resulting in a total of 4800 trials. During the analysis, only response time (RT) for correct selections was considered. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Variables**} & \multirow{2}{*}{**Number of Trials**} & \multicolumn{2}{c}{**Response Time**} & \multicolumn{2}{c}{**95\% CL**} \\ \cline{3-6}  & & **Mean** & **SD** & **UCL** & **LCL** \\ \hline Background color & 1600 & 1791 & 583 & 1680 & 1732 \\ Black & 400 & 1747 & 543 & 1888 & 1650 \\ Red & 400 & 1746 & 633 & 1885 & 1607 \\ Blue & 400 & 1850 & 604 & 1982 & 1717 \\ Purple & 400 & 1820 & 552 & 1941 & 1699 \\ Foreground color & 1600 & 1791 & 583 & 1680 & 1732 \\ White & 400 & 1618 & 454 & 1718 & 1519 \\ Yellow & 400 & 1851 & 674 & 2021 & 1725 \\ [PERSON] & 400 & 1796 & 514 & 1909 & 1684 \\ Turquoise & 400 & 1898 & 632 & 2036 & 1759 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Mean and standard deviation of the response time of the independent variables at medium time pressure levels. \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**V Variables**} & \multirow{2}{*}{**Number of Trials**} & \multicolumn{2}{c}{**Response Time**} & \multicolumn{2}{c}{**95\% Confidence Interval (CL)**} \\ \cline{3-4}  & & **Mean** & **SD** & **Upper Confidence** \\  & & & **Limit (UCL)** & **Limit (LCL)** \\ \hline Background color & 1600 & 1793 & 760 & 1876 & 1709 \\ Black & 400 & 1806 & 667 & 1953 & 1660 \\ Red & 400 & 1622 & 420 & 1714 & 1530 \\ Blue & 400 & 1896 & 1135 & 2145 & 1648 \\ Purple & 400 & 1846 & 613 & 1980 & 1711 \\ Foreground color & 1600 & 1793 & 760 & 1876 & 1709 \\ White & 400 & 1722 & 1035 & 1950 & 1495 \\ Yellow & 400 & 1822 & 758 & 1988 & 1656 \\ Green & 400 & 1821 & 592 & 1951 & 1692 \\ Turquoise & 400 & 1805 & 564 & 1928 & 1681 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Mean and standard deviation of response times of independent variables at high time pressure levels. The results revealed that the background color of the different time icons exerted no significant effect on response time, a finding consistent with that of previous research [16]. Task performance was significantly superior with the white foreground color compared with the turquoise foreground color under medium time pressure conditions (\(p\) = 0.023). Lastly, foreground color did not show a significant effect on RT under the remaining time pressure conditions. The analysis for different color combinations demonstrated that the best-performing color combinations varied across cognitive loads, as presented in Figures 5-7. Interestingly, the response times for the color combinations using white-on-black icons were significantly better than the remaining five color combinations, namely yellow-on-black (\(p\) = 0.049), turquoise-on-black (\(p\) = 0.03), yellow-on-blue (\(p\) = 0.026), green-on-purple (\(p\) = 0.034), and white-on-blue (\(p\) = 0.001). In addition, the response times for the color combinations using yellow-on-red icons were significantly better than the other color combinations, namely white-on-blue (\(p\) = 0.002), yellow-on-blue (\(p\) = 0.044), turquoise-on-blue (\(p\) = 0.005), white-on-purple (\(p\) = 0.013), and white-on-red (\(p\) = 0.007). Finally, the response time for the color combination green-on-red was significantly better than that for white-on-blue (\(p\) = 0.009);  
Under medium cognitive load conditions, the response time of the color combination using white-on-red icons was significantly better than the remaining five color combinations, which were turquoise-on-black (\(p\) = 0.015), turquoise-on-red (\(p\) = 0.025), yellow-on-blue (\(p\) = 0.004), green-on-purple (\(p\) = 0.049), and turquoise-on-purple (\(p\) = 0.019).