Understand group interaction and cognitive state in online collaborative problem solving: leveraging brain-to-brain synchrony data

Table 2 Procedures of the CPS activity

Procedure	Time length	Operation
Prepare	5 min	Inform the students of the process and purpose of the experiment, and wear and adjust the EEG equipment for the students
Questionnaire	10 min	The students finish the SPSI–R
Problem-understanding stage (PUS)	15 min	The groups understand the collaborative learning task and answer the questions in the report
Problem-solving stage (PSS)	30 min	The groups work together on the solution and present their solution in the report