“…This might be because the still face, a dyadic task in which the parent briefly becomes unresponsive and expressionless (Tronick, Als, Adamson, Wise, & Brazelton, 1978), challenges the parent-infant relationship and the infant's emotion regulation skills. Infants typically respond to this change in interaction by displaying increased distress and attempts to regulate that distress (Braungart-Rieker et al, 1998;Cohn & Tronick, 1983;Field, Vega-Lahr, Scafidi, & Goldstein, 1986;Fogel, 1982;Murray & Trevarthen, 1985;Shapiro, Fagen, Prigot, Carroll, & Shalan, 1998;Stoller & Field, 1982;Toda & Fogel, 1993;Tronick et al, 1978;Weinberg & Tronick, 1996). The still face is accordingly considered a stressful experience for infants (Weinberg & Tronick, 1994).…”