Craig R. Colder

Identifying Trajectories of Adolescent Smoking: An Application of Latent Growth Mixture Modeling

The goal of the current study was to identify discrete longitudinal patterns of change in adolescent smoking using latent growth mixture modeling. Five distinct longitudinal patterns were identified. A group of early rapid escalators was characterized by early escalation (at age 13) that rapidly increased to heavy smoking. A pattern characterized by occasional puffing up until age 15, at which time smoking escalated to moderate levels was also identified (late moderate escalators). Another group included adolescents who, after age 15, began to escalate slowly in their smoking to light (0.5 cigarettes per month) levels (late slow escalators). Finally, a group of stable light smokers (those who smoked 1-2 cigarettes per month) and a group of stable puffers (those who smoked only a few puffs per month) were also identified. The stable puffer group was the largest group and represented 25% of smokers.

Predicting alcohol patterns in first-year college students through motivational systems and reasons for drinking.

In the present study, a typological approach was used to identify patterns of alcohol use in a sample of 533 college freshmen students (<21 years old; 342 women; 191 men), on the basis of quantity and frequency of consumption, and alcohol-related problems. Personality (sensitivity to reward, SR; sensitivity to punishment, SP) and reasons for drinking were examined as correlates of drinking patterns through a mediational model. Analyses were done separately by gender. Latent profile analyses suggested 5 drinking patterns for both genders, including 3 problematic groups. SR was only associated with the problematic drinking patterns, and enhancement, coping, and social reasons for drinking mediated this relationship. These findings demonstrate the utility of latent profile analysis for identifying a drinking typology and for integrating personality and drinking motives to distinguish drinking patterns.

Psychometric Properties of the Posttraumatic Cognitions Inventory (PTCI): A Replication With Motor Vehicle Accident Survivors.

This study examined the factor structure, internal consistency, concurrent validity, discriminant validity, and discriminative validity of the Posttraumatic Cognitions Inventory (PTCI; E. B. Foa, A. Ehlers, D. M. Clark, D. F. Tolin, and S. M. Orsillo, 1999) in a sample of 112 individuals who had experienced a serious motor vehicle accident. Results generally supported the 3-factor structure of the PTCI: (a) Negative Cognitions About Self, (b) Negative Cognitions About the World, and (c) Self-Blame. Subscales reflecting negative thoughts of the self and world showed adequate internal consistency, as well as good concurrent, discriminant, and discriminative validity. However, difficulties with the subscale representing self-blame emerged, specifically poor concurrent and discriminant validity. Potential reasons for this finding are discussed. The PTCI seems to be a promising measure of negative and dysfunctional posttrauma cognitions, which deserves continuing attention.

Vulnerability to peer influence: A moderated mediation study of early adolescent alcohol use initiation

Affiliation with deviant peers is a correlate of adolescent alcohol use; however, the mechanism accounting for this association remains unclear, particularly with respect to initiation of alcohol use in early adolescence. This prospective study examines perceived peer attitudes and use as a mediator between peer delinquency and initiation of alcohol use, and how parenting may moderate vulnerability to this risk pathway. Participants included 371 11-13 year-old adolescents (55.5% female, 83.0% Caucasian). Results suggested that high levels of peer delinquency prospectively predicted perceived peer approval and use of alcohol and that peer approval and use of alcohol prospectively predicted initiation of alcohol use. Thus, reinforcement and modeling of alcohol use appear to be important mechanisms by which delinquent peers influence the initiation of drinking. There was no support for parental warmth or control as moderators of peer influence.

The interactive effects of infant activity level and fear on growth trajectories of early childhood behavior problems.

The current study examined the interactive effects of infant activity level and fear on growth trajectories of behavior problems in early childhood (age 4 to 8 years) using maternal ratings. The sample was drawn from the National Longitudinal Survey of Youth (NLSY) and included children who were between 1 and 11 months in 1986. Findings suggested that boys characterized by high activity level and low levels of fear in infancy escalated in both externalizing and internalizing symptoms. Also, boys characterized by high fear and low activity level increased in internalizing symptoms and these effects seemed to be specific to depression rather than anxiety. Temperament did not predict escalation in externalizing symptomatology for girls, but low levels of fear predicted increases in internalizing symptoms. There was also evidence for a decline in depression specific symptoms for girls characterized by high fear and low activity in infancy. These findings suggest the importance of examining interactive models of temperament risk and considering gender specific pathways to behavior problems.

Life stress, physiological and subjective indexes of negative emotionality, and coping reasons for drinking: is there evidence for a self-medication model of alcohol use?

Alcohol use is often viewed as means of coping with distress, but support for this model has been inconsistent. The author examined stress and negative emotionality and their interaction as predictors of drinking motives in a sample of college drinkers. Both physiological and self-reported reactivity to a mood induction, and self-reported trait negative affect, were assessed. High stress was associated with coping motives, particularly among individuals who exhibited electrodermal reactivity to the mood induction. Respiratory sinus arrhythmia (RSA) reactivity was associated with coping motives. Electrodermal and RSA reactivity and stress were unrelated to enhancement and social motives. Self-reported mood reactivity and trait negative affect were not associated with any of the drinking motives. These findings offer some support for the self-medication model of alcohol use.

Attention bias and disinhibited behavior as predictors of alcohol use and enhancement reasons for drinking.

Disinhibition is a risk factor for alcohol use that may be specifically linked to drinking to enhance positive affect (enhancement motives). In this study individual differences germane to disinhibition were assessed, and their relation to alcohol use and reasons for drinking was examined. Laboratory tasks assessed attentional biases for reward and punishment cues and disinhibited behavior. Self-reported personality, alcohol use, and reasons for drinking were included. Frequent alcohol use and frequent drinking for enhancement, but not for coping or social reasons, were associated with a bias to attend to reward cues and disinhibited behavior. Poor inhibitory control assessed by self-reports was also associated with alcohol use and enhancement reasons for drinking. Results support a positive reinforcement mechanism of alcohol use.

Trauma and Posttraumatic Stress Symptoms Predict Alcohol and Other Drug Consequence Trajectories in the First Year of College

OBJECTIVE College matriculation begins a period of transition into adulthood, one that is marked by new freedoms and responsibilities. This transition also is marked by an escalation in heavy drinking and other drug use as well as a variety of use-related negative consequences. Trauma and symptoms of posttraumatic stress disorder (PTSD) may affect alcohol and drug problems and, thus, may be a point of intervention. Yet, no studies have examined trauma, PTSD, and alcohol and drug problem associations during this developmental period. The present study provides such an examination. METHOD Matriculating college students (N = 997) completed surveys in September (Time 1) and at 5 subsequent time points (Time 2-Time 6) over their 1st year of college. With latent growth analysis, trajectories of alcohol- and drug-related consequences were modeled to examine how trauma (No Criterion A Trauma, Criterion A Only, No PTSD Symptoms) and PTSD (partial or full) symptom status predicted these trajectories. RESULTS Results showed substantial risk for alcohol- and other drug-related negative consequences that is conferred by the presence of PTSD at matriculation. Those with both partial and full PTSD started the year with more alcohol and drug consequences. These individuals showed a steeper decrease in consequences in the 1st semester, which leveled off as the year progressed. Both alcohol and drug consequences remained higher for those in the PTSD group throughout the academic year. Hyperarousal symptoms showed unique effects on substance consequence trajectories. Risk patterns were consistent for both partial and full PTSD symptom presentations. Trajectories did not vary by gender. CONCLUSIONS Interventions that offer support and resources to students entering college with PTSD may help to ameliorate problem substance use and may ultimately facilitate a stronger transition into college and beyond.

Pathways from proactive and reactive aggression to substance use

Childhood aggression is a known risk factor for adolescent substance use; however, aggression is a complex construct, and developmental researchers have identified a variety of subdimensions that may be germane to substance use. Very little research has examined risk pathways from subdimensions of aggression. The current study examined a developmental model and tested whether childhood proactive aggression, reactive aggression, or both were related to the development of substance use in adolescence in a sample of 126 children (mean age at initial assessment = 10.4 years, SD = 0.51). Peer rejection and peer delinquency were examined as potential mediators of these relations. The findings suggest that proactive aggression was indirectly associated with substance use through peer delinquency. Reactive aggression was also indirectly associated with substance use through a complex mediational chain, such that high levels of reactive aggression were associated with high levels of peer rejection, which in turn were associated with peer delinquency (p = .06), which subsequently predicted substance use.

Negative affect, stress, and smoking in college students: Unique associations independent of alcohol and marijuana use

INTRODUCTION Stress and negative affect (NA) figure prominently in theoretical models of smoking initiation, maintenance and relapse, yet few studies have examined these associations among college students. Further complicating examination of these associations, smoking often occurs in the context of other substance use (e.g., alcohol, marijuana) in college populations. Thus, it remains unclear whether stress and NA are associated with cigarette use among college students, and if so, whether these associations are evident after controlling for effects of other substance use. The goals of this study were: a) to examine whether several aspects of stress (objective events, subjective experiences) and NA (sad mood, general emotional distress) were associated with cigarette smoking among college students and b) whether associations remained after accounting for alcohol and marijuana use. SAMPLE A large sample of college freshmen (N=633) followed longitudinally over 35 weeks via internet assessments. RESULTS Results of hierarchical linear modeling demonstrated that measures of subjective stress and NA were positively related to cigarette use, whereas measures of objective stressful events were negatively related to cigarette use. When alcohol and marijuana use were added to the models, associations between smoking and stress/NA were diminished. Associations between NA and smoking remained significant; however, associations between subjective stress/stressful events and smoking were no longer significant. CONCLUSIONS This is the first study to comprehensively examine links between subjective and objective measures of stress and smoking behavior among college students while also considering the influence of other substance use. Negative affect was the most robust correlate of smoking among college students. Subjective and objective stress do not appear to be strongly associated with college smoking above and beyond alcohol and marijuana use. Stress may not be an important etiological factor for relatively low levels of cigarette use among college students. Given that relations between NA/stress and cigarette smoking were diminished when concurrent alcohol and marijuana use was considered, it is imperative for future studies of college students to consider other substance use.