Table 1. Means (Standard Deviations in Parentheses) of Children's Physiological Reactivity Scores, Fire Alarm Session I Memory Performance, and Protocol Session II Memory Performance.

	High support	Low support	Final sample
Autonomic scores	N = 26	N = 27 – 28	N = 62 – 63
PEP difference	0.43 (1.72)	−0.13 (1.70)	0.01 (1.74)
RSA difference	0.05 (0.25)	0.04 (0.43)	0.05 (0.35)
Reactivity index	0.04 (0.66)	−0.10 (0.64)	0.03 (0.70)
Cortisol scores	N = 15 – 16	N = 24 – 26	N = 46 – 49
Cortisol Time 1	0.11 (0.07)	0.10 (0.07)	0.11 (0.07)
Cortisol Time 2	0.07 (0.04)	0.07 (0.05)	0.07 (0.05)
Cortisol difference	−0.04 (0.06)	−0.03 (0.06)	−0.03 (0.06)
Session 1 fire alarm memory interview	N = 28	N = 29	N = 62
Units of correct information	9.59 (8.27)	8.18 (6.76)	8.65 (7.45)
Direct question correct	0.85 (0.18)	0.82 (0.18)	0.84 (0.18)
Session 2 memory interview	N = 28	N = 29	N = 57
Units of correct information	12.35 (9.11)	12.07 (8.61)	12.21 (8.78)
Direct question correct	0.67 (0.11)	0.67 (0.12)	0.67 (0.12)
Direct question errors	0.23 (0.09)	0.24 (0.10)	0.24 (0.10)
Direct question do not know	0.08 (0.07)	0.08 (0.07)	0.08 (0.07)

Note. PEP = pre-ejection period; RSA = respiratory sinus arrhythmia. For PEP and RSA difference scores, greater values reflect lower reactivity. The autonomic reactivity index was a composite score, with high scores reflecting the combination of high sympathetic activation and parasympathetic withdrawal. The sample numbers for some of the high- and low-support condition means do not sum to the final sample number because the social support manipulation was introduced at the outset of the second session, and 6 children who have data during the first session were not included in the second session. Also, 1 child was missing PEP data because of equipment failure, and several children's cortisol samples could not be assayed because of insufficient saliva to conduct duplicate assays. One child did not answer the fire alarm memory questions.