One long-standing theoretical model of shyness proposes that the origins and maintenance of shyness are associated with an approach-avoidance motivational conflict (Asendorpf, 1990), such that shy individuals are motivated to socially engage (high approach motivation) but are too anxious to do so (high avoidance motivation). However, this model has not been empirically tested in predicting the development of shyness. In two separate longitudinal studies, we used the Carver and White (1994) Behavioral Inhibition and Activation System (BIS/BAS) scales as a proxy of approach-avoidance motivations and growth curve analyses to examine whether individual differences in these hypothesized motivational tendencies were associated with the development of shyness across 3 years from late childhood to adolescence (Study 1, N = 1284; 49.8% female, Mage = 10.72, SDage = 1.73, M level of parental education fell between associate’s degree/diploma and undergraduate degree) and across nearly a decade from emerging adulthood to young adulthood (Study 2, N = 83; 57.8% females, Mage = 23.56 years, SDage = 1.09 years, 92.8% had at least a high school education). Contrary to the approach-avoidance conflict model of shyness, we found that a combination of high BIS/low BAS, not high BIS/high BAS, was associated with relatively higher shyness contemporaneously and across development in both studies. We discuss the processes that might link individual differences in approach-avoidance motivations to the development of shyness in adolescence and young adulthood.
The authors examined how children's frontal electroencephalogram (EEG) theta/beta ratio-an index of neurocognitive control-changed from baseline to a social stressor, and whether these EEG changes moderated the relation between temperament and anxiety. Children (N = 152; M age = 7.82 years, 52% male, 81% White) had their EEG recorded during a baseline and speech anticipation condition. Children's frontal theta/beta ratio decreased from baseline to speech anticipation, and this baseline-to-task change moderated the relation between temperamental shyness and social anxiety. Temperamental shyness was related to higher state and trait social anxiety only among children with large baseline-to-task decreases in theta/beta ratio. Findings are consistent with theoretical models hypothesizing that temperamentally shy children with heightened neurocognitive control may be at greater risk for anxiety.
The reactivity-regulation model suggests that the origins and maintenance of shyness results from relatively high levels of reactivity in combination with relatively low levels of regulation. Although this model has received some empirical support, there are still issues regarding directionality of the relations among variables and a dearth of studies examining the joint influence of reactivity and regulation on the prospective development of shyness. Using a longitudinal design, we first examined whether the relations among reactivity, regulation, and shyness were unidirectional or bidirectional in a sample of 1284 children (49.8% female, 84.1% White; mean parental education fell between associate degree/diploma and undergraduate degree) assessed annually across three waves from late childhood and early adolescence (M age = 10.72 years) to adolescence (M age = 12.42 years) and then examined whether reactivity and regulation interacted to influence the development of shyness over time. At Wave 1, shyness was related to higher levels of reactivity and lower levels of regulation at Wave 2, but neither reactivity nor regulation at Wave 1 predicted shyness at Wave 2. At Wave 2, shyness predicted greater reactivity at Wave 3, but shyness at Wave 3 was only predicted by lower levels of regulation at Wave 2. Contrary to the reactivity-regulation model of shyness, we found that relatively high levels of reactivity and low levels of regulation predicted a steep decrease in shyness over 3 years. These results are discussed in the context of the socioemotional difficulties experienced by shy individuals and demonstrate the importance of empirically evaluating long-standing models of personality development.
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