Tim Janssen

Tim Janssen
Brown University · Center for Alcohol and Addiction Studies

Ph.D.

About

54
Publications
4,499
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,005
Citations
Additional affiliations
September 2018 - present
Brown University
Position
  • Professor (Assistant)
August 2015 - August 2018
Brown University
Position
  • PostDoc Position
May 2009 - May 2015
University of Amsterdam
Position
  • PhD Student

Publications

Publications (54)
Article
Background Drinking events are characterized by social and physical contexts that are associated with level of alcohol consumption. Ecologically valid data is needed to delineate aspects of the drinking context that are most likely to precipitate excessive alcohol consumption. Methods We utilized event-level data from a longitudinal study that inc...
Preprint
BACKGROUND Adolescents in residential substance use treatment are at extremely high risk for relapse following discharge to the community. Parenting practices, including parental monitoring and parent-adolescent communication, have been established as key predictors of adolescent substance use outcomes and relapse. However, traditional office-based...
Article
Background: Adolescents in residential substance use treatment are at extremely high risk for relapse following discharge to the community. Parenting practices, including parental monitoring and parent-adolescent communication, have been established as key predictors of adolescent substance use outcomes and relapse. However, traditional office-bas...
Article
Promoting parent involvement in adolescent residential substance use treatment is an evidence-based principle, yet engaging parents is challenging. Parent SMART (Substance Misuse among Adolescents in Residential Treatment) is a technology-assisted intervention that was designed to engage parents of adolescents in residential SU treatment during the...
Article
Full-text available
Background: Opioid-related overdoses and harms have been declared a public health emergency in the United States, highlighting an urgent need to implement evidence-based treatments. Contingency management (CM) is one of the most effective behavioral interventions when delivered in combination with medication for opioid use disorder, but its implem...
Article
Introduction The COVID-19 pandemic collided with the opioid epidemic and longstanding health inequities to exacerbate the disproportionate harms experienced by persons with opioid use disorder (OUD) who self-identify as from racial and ethnic minority groups. Disrupted access to harm reduction services (e.g., naloxone, sterile syringes, recovery su...
Article
Full-text available
Exposure to alcohol content in the media, especially in movies, is a demonstrated risk factor for adolescent alcohol use. This paper examines processes underlying this association and whether parenting mitigates such harms. A mediational model of parental restriction of mature media (W1), alcohol content exposure (W2), alcohol expectancies, peer no...
Article
Alcohol outcomes expectancies (AOEs) are robust predictors of alcohol initiation and escalation of drinking behavior among adolescents. Although measurement invariance is a prerequisite for inferring valid comparisons of AOEs across groups (e.g., age), empirical evidence is lacking. In a secondary data analysis study, we employed regularized modera...
Article
Objective: This study assessed parental communication and behavior related to children's Internet and social media usage to delineate profiles of parenting regarding these newer forms of media and associated those profiles with youth alcohol and marijuana use. Method: Using data from 748 adolescents (mean age = 15.8, 52% female, 25% non-White) a...
Article
Adolescents in residential level of care for substance-related problems have high risk of relapse following discharge. Parent engagement lowers relapse risk, but there are myriad barriers to engaging parents in residential treatment and continuing care. Parent SMART (Substance Misuse in Adolescents in Residential Treatment) is a technology-assisted...
Article
Background The COVID-19 pandemic significantly altered treatment delivery for opioid treatment programs (OTPs) dispensing medications for opioid use disorder (MOUD). We aimed to identify patterns of substance use among MOUD patients and examine whether COVID-19-related impacts on access to healthcare varied across subgroups. Methods This analysis...
Article
According to expectancy theory, outcome expectancies are first formed vicariously (through observing other people) and then through direct experience. This cohort-sequential longitudinal study explored these expectancy origins in 1,023 youths (52% female, ages 10.5–15.5 years at recruitment, M = 12.47 years, SD = 0.95). Discontinuous multilevel gro...
Article
We reexamined the psychometric properties of the Momentary Impulsivity Scale (MIS) in two young adult samples using daily diary (N = 77) and ecological momentary assessment (N = 147). A one-factor between- and within-person structure was supported, though “I felt impatient” loaded poorly within-person. MIS scores consistently related to emotion-dri...
Article
To understand how exposure to victimization during adolescence and the presence of comorbid psychological conditions influence substance use treatment entry and substance use disorder diagnosis from 14 to 25 years old among serious juvenile offenders, this study included 1,354 serious juvenile offenders who were prospectively followed over 7 years....
Article
Full-text available
Background: Alcohol craving is common among adolescents, stronger among those with more alcohol-related problems, and predicts drinking levels in their daily lives. Yet, the conditions that predict momentary changes in craving in real time among adolescents remain unclear. Objectives: This study examined the interactive effects of momentary risk-ta...
Article
Objective We investigated the technical model of motivational interviewing (MI) in a dual‐outcome intervention (i.e., alcohol, sexual risk; N = 164; 57% female). Method We identified latent classes of client change statements, based on the proportion of change talk (CT) over the session. We then examined whether outcomes were related to CT class,...
Article
Full-text available
Parental social support and monitoring are associated with children’s externalizing behavior but clarity is needed on how these mechanisms interact to influence youth. This study examined if parental social support magnifies the protective effects of sources of parental knowledge (Parental Control, Parental Solicitation, Child Disclosure) on the de...
Article
This study tested technical and relational processes hypothesized to explain the therapeutic benefit of an efficacious brief motivational interview (BMI). A randomized controlled trial compared the efficacy of a BMI to an attention-matched control (i.e., relaxation training [REL]) for reducing heavy alcohol consumption and associated negative conse...
Article
Survival analysis is a class of models that are ideal for evaluating questions of timing of events, which makes them well-suited for modeling the development of a process such as initiation of substance use, development of addiction, or post-treatment recovery. The focus of this review paper is to demonstrate how survival models operate in a broade...
Article
This study examined sequential relationships between clinician skills and client statements about behavior change in a randomized clinical trial comparing a brief motivational intervention (BMI) to a relaxation training control condition (REL) in a sample of heavy drinking young adults. Clinician and client interactions (N = 167) were assessed acco...
Article
Background: Recanting - denying previous reports of lifetime substance use - occurs frequently in longitudinal investigations of adolescent substance use. While research has focused on how individual differences contribute to recanting, intra-individual factors associated with recanting over time remain understudied. Methods: Adolescents (n = 10...
Article
Introduction: While alcohol-specific parenting practices have demonstrated unique effects on adolescent substance use, their efficacy in the context of parental drinking levels has not been studied. This study assessed the influence of three alcohol-specific parenting practices (rules, punishment, communication) on adolescent alcohol use, and the...
Article
Objective: Adolescence is a period during which youth may begin experimenting with substances. Youth with overweight or obesity may be at increased risk for substance use, including cigarette smoking. Understanding the associations between smoking and excess weight and the pathways associated with increased likelihood for smoking initiation is of...
Article
Contingency management (CM) is a well-established treatment for opioid use, yet its adoption remains low in community clinics. This manuscript presents a secondary analysis of a study comparing a comprehensive implementation strategy (Science to Service Laboratory; SSL) to didactic training-as-usual (TAU) as a means of implementing CM across a mult...
Article
Full-text available
Purpose of review: We describe the state of research on substance use portrayals in marketing and media, considering exposure to tobacco, alcohol, e-cigarette, and marijuana content. Putative mechanisms are offered, and recommendations made for effective prevention strategies for mitigating the influence of these portrayals. Recent findings: The...
Article
Full-text available
Youth are heavy consumers of media, and exposure to mature media content is associated with initiation and progression of substance use. Parental restriction of such content has been shown to be an effective mechanism to reduce negative consequences attributed to exposure to mature media content. This study assessed the influence of parental restri...
Article
Full-text available
Adolescence is a time of heightened impulsivity as well as substantial exposure to the effects of popular media. Specifically, R-rated movie content and sensation seeking have been shown to be individually and multiplicatively associated with early alcohol initiation, as well as to mutually influence one another over time. The present study attempt...
Article
Aims: The current study aimed to test for potential interactive effects of three implicit alcohol-related associations (drinking identity, alcohol approach and alcohol excitement) in predicting concurrent and prospective alcohol consumption and risk of alcohol use disorders (AUDs) in two samples of the US undergraduate drinkers and non-drinkers....
Article
Introduction: Cognitive susceptibility to cigarette smoking has been demonstrated to predict future cigarette initiation in adolescents. Examining this construct prior to tobacco product initiation may provide useful information on the differential risk of individuals initiating cigarette vs. e-cigarette products. Additionally, examining how susce...
Article
Movie alcohol exposure is a known and consistent predictor of adolescent alcohol use initiation and escalation. Nearly 90% of the top U.S. movies contain alcohol content. Social–cognitive theory posits reciprocal links among environmental influences (e.g., movie alcohol exposure), social–cognitive processes (e.g., perceived norms, susceptibility, a...
Article
Background: Exposure to alcohol content in movies has been shown to be associated with adolescent use of alcohol, including earlier onset. This study examined the influence of movie alcohol exposure on subsequent alcohol onset, considering the social context (whether the movie was viewed with a friend or parent). We examined whether media's influe...
Article
Expectations about alcohol’s effects and perceptions of peers’ behaviors and beliefs related to alcohol use are each shown to strongly influence the timing of drinking onset during adolescence. The present study builds on prior work by examining the conjoint effects of within-person changes in these social-cognitive factors on age of adolescent dri...
Article
Objective: Although alcohol use is considered a developmental phenomenon, there is a relative dearth of studies disaggregating predictors of alcohol use initiation versus early escalation of drinking. One perspective that has emerged is that social levels of influence may be relevant for the initiation of drinking, whereas individual levels of inf...
Article
Objective: The Timeline Follow-back (TLFB) questionnaire has become a pre-eminent tool in substance use and human immunodeficiency virus (HIV) risk research, allowing researchers to assess fine-grained changes in risk behavior over long periods. However, data on accuracy of recall over long (12-month) periods are sparse, especially combined data o...
Article
Parent-adolescent relationship (PAR) factors such as social support and negative interactions are associated with initiation of alcohol and marijuana use during adolescence. However, few studies have examined whether the relationship between PAR, especially the paternal role, and substance use onset varies by ethnicity. This is important given that...
Article
Background Social relationships have been demonstrated as a key predictor of relapse among addicted persons and are likely to be important determinants of HIV risk behaviors also. However, the degree to which this population can reliably and consistently identify important people (IPs) in retrospect has been understudied. Methods Using the modifie...
Article
Purpose: This study aimed to determine the unique utility of poor sleep health in predicting the onset of substance use in adolescents. Methods: Middle school students (N = 829, mean (M)age = 12.6 years, 52% female, 73% white) who participated in an ongoing prospective study of alcohol onset and progression completed a set of Web-based health be...
Article
Full-text available
Aims Research informed by dual-process models of addictions has clearly demonstrated an association between implicit and explicit alcohol-related cognitions and alcohol consumption. However, the literature is limited with respect to examination of the cognitive abilities that may moderate these associations across populations. This study examined r...
Article
Background: We investigated the joint development between implicit approach bias and early adolescent alcohol use, and examined whether the link between approach bias and alcohol use was moderated by working memory (WM). Methods: The current study used data from a 2-year, 4-wave online sample of 378 Dutch early adolescents (mean age 14.9 years,...
Article
Full-text available
Recently, it has been suggested that impairments in executive functioning might be risk factors for the onset of alcohol use rather than a result of heavy alcohol use. In the present study, we examined whether two aspects of executive functioning, working memory and response inhibition, predicted the first alcoholic drink and first binge drinking e...
Article
Full-text available
Introduction: To prospectively predict the onset of use of alcohol, cigarettes and marijuana among Dutch adolescents, using behavioral and self-report measures of impulsivity-related facets. Specifically, we investigated whether behavioral measures of impulsivity predicted the onset of substance use above and beyond self-report measures of impulsiv...
Data
Contains paragraph describing reward structure, and tables of regression results when baseline users are included.
Article
Full-text available
Objective: Early onset of alcohol use and persistent use of alcohol during adolescence have been associated with later problem behavior, such as heavy drinking and the use of other substances. Several personality characteristics have been related to the onset and persistent use of alcohol during adolescence. In the present study, we examined the r...
Article
Full-text available
Aims: To examine the impact of an important context variable (alcohol-specific parental rules) and an important person variable (risky personality traits) and their interaction on prospective adolescent drinking. Methods: Participants were 252 adolescents, 67.9% female, between 13 and 16 years old. Data were collected via online assessments during...
Article
Previous research has identified working memory (WM) as a possible risk factor for problem drinking in adolescence. At the same time, results suggest that WM functioning is negatively influenced by the use of alcohol. To get a better understanding of the nature of this relationship, the present study examined the prospective bidirectional associati...
Article
This study examined the bi-directional prospective link between automatic alcohol-approach tendencies and alcohol use in a group of young adolescents (mean age = 13.6 years). The adolescents in the present study were assumed to be at-risk of early alcohol use and later problem drinking. It was hypothesized that alcohol use and automatic approach te...
Article
This study examined the association between automatic processes and drinking behavior in relation to individual differences in response inhibition in young adolescents who had just started drinking. It was hypothesized that strong automatic behavioral tendencies toward alcohol-related stimuli (alcohol-approach bias) were associated with higher leve...
Article
Per definition, alcohol expectancies (after alcohol I expect X), and drinking motives (I drink to achieve X) are conceptually distinct constructs. Theorists have argued that motives mediate the association between expectancies and drinking outcomes. Yet, given the use of different instruments, do these constructs remain distinct when assessment ite...
Article
Sensory-specific satiety refers to a temporary decline in pleasure derived from consuming a certain food in comparison to other unconsumed foods. It has been argued that such a reduction may not be limited to food liking but extends to food wanting as well. Animal research suggests that sensory-specific satiety reflects a reduction in both food lik...

Questions

Question (1)
Question
I have longitudinal study data from two sites with missing data at three follow-up time points due to attrition. While I know I will do best practice in dealing with this missing data (MLR based on predictors of missing data), I am not sure how to apply best practice in identifying these predictors.
The issue is that there are over 24 putative predictors of missing data, and three follow-up time points with different rates of attrition, at 2 sites. So that's 24*3*2 =~ 140 inference tests, leading to a high likelihood of spurious significant relations. Of course, I could adjust the significance level, but I don't typically find that the best way of identifying important predictors of missingness and I worry about dishonesty in suppressing predictors since these corrections tend to be overly conservative.
Anyone else dealt with this, or familiar with gold-standard approaches to this situation?

Network

Cited By