Note:  These data were obtained by following children. 10 boys and 10 girls in each age group were asked to lead a walk from their urban and suburban homes to the "farthest place that you think that you can walk to."  The data were not the result of analysis of cases of lost children.

Table 1. Crow's Flight Distance (in Meters) The length of the straight line connecting the start and the farthest point on the child's route.  Typically used to set a radius for a search area.

Table 2. Total Time on Excursion (in Minutes) The total time taken by children to reach and return from the place they selected as the farthest they could walk to.  May be useful for judging the urgency of search.

Table 3. Rate of Walking (in Meters/Minute) Rate was calculated by dividing the total round trip distance on actual paths by the total time on the excursion.  May be used to estimate how far a child could travel if he or she were walking along a known path.

Table 4. Angle of Dispersion (in Degrees) Designates a wedge for search. The wedge is centered on either side of the crow's flight line that connects a child's starting point and stated destination.  The angular width (in degrees) describes the typical size of the wedge necessary to contain the child's routes to their destination.  For example, the second column of Table 4 indicates that 50% of the 5- to 6-year-old children choose routes that could be contained in a wedge of 136 degrees.

Table 1. Crow's Flight Distance (in Meters).

 

Age Group (in years)	Percentiles
	25	50	75	90
3-4	260	405	550	730
5-6	380	600	770	1370
7-8	450	645	1085	1285
9-10	755	1365	1825	2145
11-12	1195	1465	2615	3040

Table 2. Total Time on Excursion (in Minutes).
 

Age Group (in years)	Percentiles
	25	50	75	90
3-4	14	23	29	30
5-6	21	33	50	58
7-8	25	34	43	51
9-10	30	56	71	76
11-12	41	49	95	120

Table 3. Rate of Walking (in Meters/Minute).
 

Age Group (in years)	Percentiles
	25	50	75	90
3-4	44	53	64	69
5-6	60	65	71	75
7-8	66	72	77	85
9-10	68	73	78	80
11-12	69	80	89	93

Table 4. Angle of Dispersion (in Degrees).
 

Age Group (in years)	Percentiles
	25	50	75	90
3-4	64	150	202	338
5-6	98	136	230	258
7-8	102	138	248	334
9-10	108	216	300	360
11-12	118	198	290	360

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