Table 1. Descriptive Statistics for Mother-Child Dyads by Maltreatment Group Status.

	Maltreatment (N=43)	Control (N=36)
Participant Characteristics
Proportion of Female Children	.53 (.50)	.47 (.51)
Child Age	3.88 (.79)	3.75 (.73)
Mother Age	29.49 (6.67)	31.22 (5.11)
Maternal Education (Years)	12.53 (2.03)*	14.92 (2.92)*
Joint-Task Outcomes
Proportion Who Completed Task	.35 (.48)	.33 (.48)
Number of Epochs (Task Length)	8.56 (1.83)	8.78 (1.59)
Proportion of Positive Synchrony	.52 (.28)	.58 (.31)
Baseline Child RSA	6.43 (1.24)	6.35 (1.34)
Baseline Mom RSA	5.57 (1.48)†	6.18 (1.27)†
On-task Child RSA	5.68 (1.09)	5.66 (1.20)
On-task Mom RSA	5.47 (1.36)	5.82 (1.29)

Note: Values shown are means (and standard deviations).

^*Significant group difference at p < .01, two-tailed;

^†marginal trend at p < .07.