## 5 Data Collection and Analysis
### Behavioral Task Performance Using Task Completion Time and Task Accuracy
Regarding the effect of interruption mode, the negotiated mode (mean = 116.85, SD = 9.57) had the lowest error rate, and the immediate mode had the highest rate (mean = 137.86, SD = 13.36). \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Time Performance Ratio (TPR) 1** & & & \\ \hline \multicolumn{2}{c}{**(Primary/Peripheral Task)**} & \multicolumn{1}{c}{**Mean**} & \multicolumn{1}{c}{**Standard Deviation**} \\ \hline \multirow{2}{*}{Cognitive/cognitive task set} & Immediate & 166.81 & 13.08 \\  & Scheduled & 135.90 & 13.61 \\  & Negotiated & 184.41 & 13.63 \\ \hline \multirow{2}{*}{Cognitive/skill task set} & Immediate & 161.28 & 10.12 \\  & Scheduled & 124.81 & 10.28 \\  & Negotiated & 171.71 & 14.47 \\ \hline \multirow{2}{*}{Skill/cognitive task set} & Immediate & 112.32 & 3.99 \\  & Scheduled & 106.18 & 3.98 \\  & Negotiated & 118.71 & 4.58 \\ \hline \multirow{2}{*}{Skill/skill task set} & Immediate & 109.26 & 4.88 \\  & Scheduled & 104.67 & 4.16 \\ \multicolumn{2}{c}{Negotiated} & 114.77 & 7.15 \\ \hline \hline \end{tabular} 1  
\end{table} 
Table 5: Descriptive statistics of time performance ratio (TPR) under each task set. Figure 6: Task completion time by task set and interruption coordination mode. In task performance measures, interruptions more negatively affected task completion time on the negotiated stage. Figure 6 shows that task completion time in the negotiated mode was higher than that in the immediate and the scheduled modes (F (2, 331) = 7.11, \(p\) < 0.001). In the negotiated mode, participants had not much perceived time pressure for completing the task, and they could manage the onset of interrupting peripheral tasks with control. This mode can be deemed as a consecutive process, not a parallel process. Resumption lags between primary and peripheral tasks in the negotiated mode are longer than those in other modes. Due to the effects of task type, shown in Figure 7, cognitive primary task sets took more task completion time than skill primary task sets (F (1, 331) = 11.88, \(p\) < 0.001). Since cognitive tasks need more mental demands for task completion, more interruption lags to initiate peripheral tasks and resumption lags to continue interrupted primary tasks are required. Such long switching times make it difficult to retrieve the cues of the interrupted timing and place, and impede the transition to the new task [23]. Accordingly, a memory load is the crucial aspect of the negative interruption effects on quantitative performance. Since cognitive tasks require more memory load than sensory information-based skill tasks, the degradation of task performance in \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Wrong Answer Rate Ratio (WARR) 1** & & & \\ \hline
**Type Rate Ratio (TRR) 2** & & & \\ \hline
**(Primary/Peripheral Task)** & & & \\ \hline \multirow{3}{*}{Cognitive/cognitive task set} & Immediate & 159.50 & 18.62 \\  & Scheduled & 134.84 & 12.30 \\  & Negotiated & 127.38 & 8.63 \\ \hline \multirow{3}{*}{Cognitive/skill task set} & Immediate & 148.34 & 13.52 \\  & Scheduled & 131.91 & 15.00 \\  & Negotiated & 121.16 & 8.63 \\ \hline \multirow{3}{*}{Skill/cognitive task Set} & Immediate & 116.88 & 8.81 \\  & Scheduled & 111.66 & 7.72 \\  & Negotiated & 107.49 & 7.07 \\ \hline \multirow{3}{*}{Skill/skill task set} & Immediate & 122.77 & 8.53 \\  & Scheduled & 112.23 & 5.66 \\ \cline{1-1}  & Negotiated & 110.80 & 3.45 \\ \hline \multirow{3}{*}{1 Wrong Answer Rate Ratio (WARR) = Typo Rate with interruptions} & Wrong Answer Rate without interruption & 2  & Type Rate Ratio (TRR) = Typo Rate without interruption \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Descriptive statistics of typo rate ratio and wrong answer rate ratio under each task set. Figure 7: Task accuracy by task set and interruption coordination mode. cognitive tasks is more severe. However, in the negotiated mode, there was no significant difference in task performance. Interruption effects showed different results from task accuracy.