Table A.1.

Estimates from Two-piece Multilevel Growth Curve Models with Landmark Registration for Cortisol, sAA, and Peer Relationships

Cortisol	Peer Relationship Construct
	Connectedness		Comfort		Negative Evaluation		Victimization
	b	SE	b	SE	b	SE	b	SE
Intercept	1 71**	0.09	1 71**	0.10	1.70**	0.10	1 71**	0.09
Peer Relationship Constructa	−0.01	0.02	−0.03	0.03	−0.02	0.05	−0.06	0.06
Gender	0.58	0.18	0.56**	0.20	0.57**	0.20	0.57**	0.20
Estimates for Reactivityb
Intercept	0.01**	0.003	0.01**	0.003	0.01**	0.003	0.01**	0.003
Peer Relationship Constructa	−3.70×10−4	4.99×10−4	−2.60×10−4	0.001	7.47×10−6	0.001	0.002	0.002
Gender	0.003	0.01	.002	0.01	0.002	0.01	0.002	0.01
Estimates for Recoveryc
Intercept	−0.01**	0.001	−0.01**	0.001	−0.01**	0.001	−0.01**	0.001
Peer Relationship Constructa	−1.82×10−6	2.55×10−4	−1.91×10−7	4.07×10−4	6.22×10−4	6.96×10−4	4.78×10−4	8.29×10−4
Gender	−0.01**	0.003	−0.01*	0.003	−0.01*	0.003	−0.01*	0.003
Indices of Model Fit
AIC	7.4		0.6		−2.1		−7.8
BIC	21.1		13.8		11.1		5.4
sAA	Connectedness		Comfort		Negative Evaluation		Victimization
	b	SE	b	SE	b	SE	b	SE
Intercept	4.78**	0.08	4.76**	0.08	4.76**	0.08	4.76**	0.08
Peer Relationship Constructa	−0.01	0.02	−0.04	0.03	−0.04	0.05	−0.03	0.06
Estimates for Reactivityb
Intercept	0.02**	0.004	0.02**	0.004	0.02**	0.004	0.02**	0.004
Peer Relationship Constructa	6.37×10−4	8.73×10−4	5.33×10−4	0.002	−0.002	0.003	0.004	0.003
Estimates for Recoveryc
Intercept	−0.01**	0.002	−0.02**	0.002	−0.02**	0.002	−0.02**	0.002
Peer Relationship Constructa	2.04×10−4	3.67×10−4	7.52×10−4	0.001	0.001	0.001	−4.90×10−4	0.001
Indices of Model Fit
AIC	447.0		423.2		421.0		420.1
BIC	454.8		430.8		428.6		427.7

Note.

^**p < .01,

^*p < .05;

^aPeer relationship construct is a placeholder for either connectedness, comfort, negative evaluation, or victimization;

^bEstimates for slope from baseline to peak.

^cEstimates for slope from peak to end; AIC = Akaike Information Criterion; BIC = Bayesian Information Criterion.