TABLE 3.

Bivariate Correlation Analyses Between Negative Affect and Physiological Reactivity for Learners and Nonlearners, Preterm and Full-Term Infants

	Negative Affect
	Preterm Nonlearners		Preterm Learners		Full-Term Nonlearners		Full-Term Learners
	Base– Learning	Learning– Nonreinforcement	Base– Learning	Learning– Nonreinforcement	Base– Learning	Learning– Nonreinforcement	Base– Learning	Learning– Nonreinforcement
Heart rate (bpm)
Baseline-    Learning	.14	.01	−.28	−.11	.02	−.02	.30	.63**
Learning-    Nonreinforcement	−.25	.10	−.55**	.41*	−.12	−.03	.10	.18
Respiratory sinus arrhythmia (ln/msec)
Baseline-    Learning	.08	−.12	−.16	.01	−.03	−.18	−.13	−.26
Learning-    Nonreinforcement	.50*	.20	.62**	−.26	.08	−.20	.03	−.05
Cortisol (ug/dl)
Pre–post	.07	−.09	−.51**	−.12	−.19	−.20	−.04	.18

^*p<.05.

^**p<.001.