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Experiment block design. There is a total of five active blocks for each of the conditions: (a) control and (b) stress. In each block, arithmetic tasks are presented for 30 s followed by 20 s rest. The red dashed-line marks the start of the task and the green dashed-line marks the end of the task (the marking is done at every block). The stressors are based on time pressure and negative feedback of individual performance as demonstrated in (b).
