The dual systems model is a cognitive developmental framework that has risen to prominence in recent decades because of its capacity for predicting involvement in risky behaviors, particularly during adolescence (Ellingson et al., 2019; Rhyner et al., 2018; Wasserman et al., 2017). This theory focuses on the differential development of brain regions governing impulse control and sensation-seeking that lead to imbalance in these constructs during adolescence that precipitates the peak risk for involvement in risky behaviors during this period of the life-course (Steinberg et al., 2008; Steinberg, 2010). While the framework initially focused on typical development of these constructs driving the overall heightened propensity for adolescents to engage in risky behavior, there is also a great need to understand drivers of differential development of these constructs in order to better understand how atypical development may lead to even greater risk for involvement in a variety of antisocial behaviors. Deviant peer association has recently been identified as a risk factor that may be particularly important for understanding the atypical development of these constructs (Wojciechowski, 2023). However, there remain important gaps in our understanding of deviant peer association as a predictor of cognitive development. One area where additional research is necessary is understanding how early exposure to deviant peers during childhood and the entry into adolescence may be important for understanding cognitive development pertaining to impulse control and sensation-seeking. There is also a dearth of research that has examined the potential that the salience of deviant peer association as a predictor of this cognitive development may differ based on when the exposure to these peers occurs. The present study sought to address these gaps in the extant literature by examining deviant peer association as a predictor of impulse control and sensation-seeking and testing to determine whether deviant peer association significantly interacts with age to predict cognitive development.
The Dual Systems Model
As mentioned above, the dual systems model has been identified as a highly relevant framework for predicting involvement in risky behaviors and this is due to the imbalance in the development of impulse control and sensation-seeking (Steinberg et al., 2008; Steinberg, 2010). Sensation-seeking refers to the drive to seek out novel, exciting, and thrilling experiences. This cognitive construct is governed by the socioemotional network in the brain which is comprised in part by the dopaminergic system. The dopaminergic system is relevant because of its function of modulating the release of dopamine, a key neurotransmitter that is important for reward, reinforcement, and learning processes (Chen & Bonci, 2017; Corominas-Roso et al., 2007). The dopaminergic system tends to develop rapidly following puberty, leading to the establishment of novel neural pathways facilitating the release of dopamine in response to stimuli (Steinberg et al., 2008; Steinberg, 2010). The corresponding novel releases of dopamine in response to exciting stimuli may function to reward and reinforce engagement in particularly stimulating experiences, with risky behaviors like substance use presenting such an example. This rapid acceleration in development then tends to peak around the timing of entrance into adulthood and sensation-seeking may also plateau and decline around this time (Steinberg et al., 2008; Steinberg, 2010).
Impulse control refers to the capacity to stop and consider potential risks and/or consequences of an action before engagement. The cognitive control network is responsible for facilitating communication across various regions of the brain and this communication can aid in the consideration of potential consequences in a manner consistent with the ability to exert impulse control. The prefrontal cortex is an important component of this network and, unlike the dopaminergic system, tends to be one of the final regions of the brain to reach full maturity (Spencer-Smith & Anderson, 2009). The slower and steadier development of these systems leads to limited impulse control during adolescence. So, adolescents typically develop a strong drive to seek out novel and exciting experiences that antisocial behavior may present, but do not fully develop the capacity to stop and consider the risks involved with such behaviors until they reach adulthood. It is this developmental imbalance that is predicted to drive the increased risk for antisocial behaviors that is observed during adolescence (Steinberg et al., 2008; Steinberg, 2010). While the dual systems model has historically focused on identifying the typical patterns of development observed for these constructs, there is also a need to identify drivers of atypical development in order to best understand why some individuals present particularly high risk for engagement in antisocial behavior and why some individuals demonstrate early onset and chronic risk in this regard.
Deviant Peer Association as a Predictor of Dual Systems Model Development
Deviant peer association may be one risk factor that may drive differential development of impulse control and sensation-seeking. Deviant peer association refers to the degree to which an individual affiliates with and spends time with peers who are involved in antisocial behavior and/or endorse antisocial values and attitudes. Social learning theory has established itself in criminology as a prominent theory for understanding how differential association with antisocial peers may result in a socialization process that increases one’s own risk for involvement in antisocial behavior (Akers, 1973). The robust research base here mainly focuses on how this results to changes to deviant attitudes and values (Akers & Jensen, 2017; Pratt et al., 2010), but there is the potential that this peer socialization may lead to cognitive changes as well. Recent research has provided some evidence that association with deviant peers may lead to atypical dual systems model development. Wojciechowski (2023) observed that deviant peer association predicted diminished impulse control and increased sensation-seeking at follow-up even when controlling for prior levels of these constructs. Resistance to peer influence was found to have buffer against this effect for sensation-seeking, but not impulse control. This, however, was the only study identified which specifically examined the impact that deviant peers have on cognitive development in this manner. Other studies have yielded findings that offer some limited evidence that peers can influence cognitive processes in the short-term (Ciranka & Van den bos, 2019; O’Brien et al., 2011; Smith, 2018). For example, Chein et al (2011) examined adolescent and adult participants completing a simulated driving task with participants either not observed or observed by peers with their brains monitored by functional magnetic resonance imaging technology. Findings indicated that the participants were more likely to take risks when observed by peers than when alone. While this highlights the fact that youth may situationally engage in greater risk-taking when in the presence of peers, this and other research are generally limited by this situational nature and the fact that they cannot make broader claims about long-term changes in cognitive development across the life-course. The Wojciechowski (2023) study has been the only one to do this thus far, but it similarly suffers from some limitations. First, this study examined a sample of justice-involved youth, so generalizability was greatly limited. Second, this study examined these relationships during adolescence and emerging adulthood only. These limitations highlight the need for additional research on these relationships that address these issues.
The present study has the capacity to address the noted limitations of previous work in this area. The limited generalizability of the Wojciechowski (2023) study necessitates the use of a general population sample of youth to determine whether or not deviant peers have a similar impact on cognitive development as their justice-involved peers. Examining these processes with a more generalizable sample can help to determine the robustness of the previous findings and help to further guide design and implementation of treatment programming to attenuate the impact that deviant peers may have on cognitive development. The present study also sought to examine these relationships outside of adolescence and emerging adulthood. While this is generally the most relevant time both for the influence of peers and for dual systems model development to occur (Steinberg et al., 2008; Steinberg, 2010), there is also a great deal of utility in examining these processes during earlier periods of the life-course. Examining the relevance of deviant peers for influencing cognitive development during childhood may be pertinent as well, as this may set the stage for later development during more salient periods of the life-course.
Differential Salience of Deviant Peer Association by Age of Exposure
Another relevant consideration for the examination of the relationship between deviant peer association and dual systems model development is the role that age of exposure plays. While there is a dearth of research focused on understanding how deviant peers may influence cognitive development in this regard, there is even less research that examines how the salience of deviant peer association for predicting cognitive development may differ depending on when in the life-course individuals are exposed to the influence of these peers. The Chein et al. (2011) study provides some indication that life-course timing of exposure to peer influence may matter (at least in the short-term), as it was only adolescent participants demonstrated increased reward center activation when in the presence of peers than when alone, but that reward center activation did not vary based on peers vs. alone for adult participants. This, however, says little about how this may matter for longer-term patterns of cognitive development. Further, these findings may hold little relevance for understanding differences in salience for older children and those just entering adolescence; the groups focused on in the present study. Prior research has indicated that the salience of peer influence increases and peaks during adolescence (Warr, 1993; Warr, 2002). This would seem to indicate that the salience of peer influence on cognitive development should increase with age among older children and younger adolescents, as youth gaining into adolescence should demonstrate an elevated reactivity to the influence of their peers relative to their younger counterparts. However, this remains untested. Alternatively, it may be that precocious involvement with antisocial peers during childhood may trigger longer-term patterns of cognitive development that may lead to earlier development of sensation-seeking and/or an even slower development of impulse control. This necessitates a rigorous test of these propositions by examining age as a moderator of the relationship between deviant peer association and dual systems model constructs.
Current Study
The dual systems model is a prominent psychological framework focused on how the imbalance in the development of sensation-seeking and impulse control during adolescence may explain the observation of high prevalence of involvement in antisocial behavior during this period of the life-course (Le Blanc, 2020; Loeber, 2012; Steinberg et al., 2008). Deviant peer association has been observed by prior research to be an important predictor of development of these outcomes (Wojciechowski, 2023). That said, the existing research on these relationships is limited by a lack of generalizability beyond a high-risk population and a limited focus on adolescence and emerging adulthood as the periods of the life-course examined. While this is understandable given that the salience of peer influence peaks during adolescence (Warr, 1993; Warr, 2002), this limited focus is problematic because it says very little about the time preceding this important period of the life-course. Peer influence may not become a salient influence on cognitive development until individuals reach adolescence when both sets of processes become most salient. Alternatively, early peer relationships may set the stage for later behavioral issues if cognitive development is interrupted during childhood. The present study sought to address these gaps in the literature by testing the following hypotheses:
Hypothesis 1
Greater deviant peer association will predict increased sensation-seeking and diminished impulse control at follow-up.
Hypothesis 2
Age will significantly moderate the relationships between deviant peer association and dual systems model constructs.