Table 3.

EEG Data Usability and Reasons for Data Loss for All Dyads (n = 216)

	n	%
Session usable	156	72.0%
EEG not attempted due to time constraint or parent declining	6	2.8%
Child refused cap, gelling, or could not sit in chair	8	3.7%
Parent could not be capped due to wig or hair extensions	7	3.2%
Could not get usable connection with child scalp	0	0%
Could not get usable connection with parent scalp	7	3.2%
Extremely poor data quality and/or discontinued contexts due to child factors (movement, fatigue, etc.)	15	6.9%
Extremely poor data quality and/or discontinued contexts due to child factors (movement, fatigue, etc.)	3	1.4%
Child removed cap during session	19	8.8%

Notes: Some dyads had more than one reason that data were unusable, so percentages sum to more than 100%. Data is considered per dyad across all four contexts.