Table 3.

ICC values for intratester reliability

		IPD	PPD	SPD	FOT	FCT
Single Task	Elderly N = 16	0.77***	0.83***	0.47*	0.88***	0.74***
	Younger N = 22	0.86***	0.88***	0.41**	0.91***	0.76***
	Pooled N = 38	0.86***	0.86***	0.48***	0.91***	0.79***
Dual Task	Elderly N = 16	0.73***	0.62**	0.42*	0.85***	0.71***
	Younger N = 22	0.84***	0.79***	0.54***	0.93***	0.85***
	Pooled N = 38	0.86***	0.74***	0.54***	0.92***	0.86***

Table 3 shows ICC(2,1) values and significance levels (in parenthesis) for intratester reliability (Rater 1 test #1 vs. Rater 1 test #2) for step execution parameters Initiation Phase Duration (IPD), Preparatory Phase Duration (PPD), Swing Phase Duration (SPD), Foot-Off Time (FOT) and Foot-Contact Time (FCT) under single and dual task conditions calculated separately for elderly subjects (N = 16), younger adult subjects (N = 22) and the pooled population of elderly and younger adult subjects (N = 38). An average of all six step trials (three forward and three backward) was used in the analysis.