This study explored the factor structure and developmental trajectory of effortful control (EC), its relations with child adjustment, and the moderating role of age and gender in 75 4-to 6-year-old children at risk for psychopathology. Confirmatory factor analyses revealed two subcomponents of effortful control: Suppress=Initiate (the ability to inhibit a dominant response while initiating a new response) and Motor Control (inhibiting fine and gross motor activity). EC performance improved with age, and both subcomponents were associated with greater social competence at all ages. Associations with internalizing problems were moderated by child age such that greater EC was linked to fewer problems at age 4 but did not relate to problems at ages 5 or 6.The growing ability to voluntarily inhibit a dominant response to initiate a subdominant response, or effortful control (EC), is a hallmark of early childhood development (Kochanska, Murray, & Harlan, 2000;Rothbart & Bates, 1998;Rothbart & Rueda, 2005). High EC is associated with enhanced emotional and social competence (Bjorklund & Kipp, 1996;Derryberry & Rothbart, 1997;Eisenberg et al., 2003;Kochanska, Murray, & Coy, 1997;Kopp, 1982Kopp, , 1989 and with reduced internalizing and externalizing problems (Eisenberg, Gershoff, et al., 2001;Eisenberg et al., 2004;Eisenberg et al., 2003). Despite documented links between EC and child adjustment, relatively little is known about these associations in children at risk for psychopathology. In addition, although EC is multifaceted, involving a number of behavioral and neurobiological systems (Kindlon, Mezzacappa, & Earls, 1995;Murray & Kochanska, 2002;Nigg, 2000;Olson, Schilling, & Bates, 1999), most studies examine EC as a unitary construct. Consequently, there is a limited empirical basis on which to explore the developmental consequences of subcomponents of EC.
Effortful Control and SubcomponentsEC is among the early-developing individual differences that fall into the category of temperamental regulation (Derryberry & Rothbart, 1997;Eisenberg, Sadovsky, et al., 2005;Eisenberg, Zhou, et al., 2005;Posner & Rothbart, 2000). In contrast to temperamental reactivity or affective arousal, regulation refers to voluntary control of behavior and attention and serves to modulate emotional reactivity. Although most studies document coherence among measures of effortful control, EC comprises potentially dissociable domains of inhibitory control, attentional control, modulation of motor activity, and delay of gratification, all of which may have unique implications for adjustment (Kindlon et al., 1995;Mezzacappa, Kindlon, Saul, & Earls, 1998;Nigg, Goldsmith, & Sachek, 2004;Olson et al., 1999;Rothbart & Rueda, 2005).Kochanska and colleagues Kochanska, Murray, Jacques, Koening, & Vandegeest, 1996) have made notable progress in facilitating research on EC by developing a comprehensive behavioral assessment battery, the Effortful Control (EC) Battery. It assesses the suppression of dominant responses in the motor, vocal, and cognitive d...