Table 4. Correlations Between 30-Min Segments and Respective 10-, 5-, 3-, and 2-Min Segments for EF and PI Methods.

	10 min	5 min	3 min	2 min
30 min (EF)	.96*	.93*	.89*	.86*
30 min (PI)	.96*	.92*	.88*	.85*

^*p < .01.

EF  =  event frequency; PI  =  partial interval.