ERP Neural Correlates of the Interpreter Advantage in Coordination (anonymized for review)

The RT results exactly showed an interpreter advantage in coordination, especially in the bottleneck switching component. The same result was also found in stimulus-locked ERP onset latency, suggesting the advantage was probably due to efficient switching from the response selection of one task to that of the other at the bottleneck stage of dual-task processing. Smaller dual-task costs of stimulus-locked LRP onset latency thus constitute the neural correlates of the interpreter advantage in coordination.

Three additional analyses were conducted. First, the raw data of each type (in files with “*_for_ANOVA”) were respectively subjected to an ANOVA analysis with a between-group variable of Group (Interpreting, Control), and a within-group variable of Condition (single-task, dual-task_100, dual-task_150, with 100, 150 referring to different SOA conditions). Second, to minimize the influence of response grouping, 10% of the trials with the slowest Task 1 RT for each participant in each dual-task condition were excluded, and the remaining data (in files with “*_for_ANOVA_10%excluded”) underwent all the analyses above.

Third, mixed-effect models were run for the raw data of ACC and RT in Task 1 and Task 2 (in files with “*_for_mixed_effect_models”). Model formulas for analyzing the data were: ACC data: glmer(ACC ~ Group

• Condition + (1|Participant), family=binomial); RT data: lmer(RT ~ Group
• Condition + (1|Participant)).