Although matching states usually are associated with positive affect and mismatching states with negative affect, dyads sometimes attempt to repair mismatches so that coregulated, coordinated interaction can continue (Tronick, 2004) Jaffe, Beebe, Feldstein, Crown, and Jasnow (2001) reported that more optimal outcomes in the mother/infant relationship were associated with moderate, rather than high or low levels of dyadic coordination during early infancy, suggesting that mismatches are an essential aspect of high-quality interaction