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Tim Janssen
Brown University
PsychiatryDevelopmental psychologyPsychologyInjury preventionSocial psychology
38Publications
11H-index
443Citations
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Publications 39
Newest
#1Angela K. Stevens (TTU: Texas Tech University)
#1Angela K. StevensH-Index: 5
Last. Andrew K. LittlefieldH-Index: 21
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Abstract 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-driven trait impulsivity; however, MSSDs of MIS scores were unrelated to outcomes after accounting for aggregate MIS scores. We observed positiv...
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#1Hayley Treloar Padovano (Brown University)H-Index: 3
#2Tim Janssen (Brown University)H-Index: 11
Last. Robert Miranda (Brown University)H-Index: 22
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AbstractBackground: 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...
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#1Tim JanssenH-Index: 11
#2Molly MagillH-Index: 20
Last. Christopher W. KahlerH-Index: 63
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#1Kristina M. Jackson (Brown University)H-Index: 34
#2Tim Janssen (Brown University)H-Index: 11
Abstract 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 broader developmental framework and to offer guidance on selecting the appropriate model on the basis of the research question at hand. We provide ...
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#1Justin Walthers (Brown University)H-Index: 4
#2Tim Janssen (Brown University)H-Index: 11
Last. Molly Magill (Brown University)H-Index: 20
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Abstract 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 according to two established observational rating systems. Sequential analyses examined the transitional associations between clinicians' use of ...
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#1Cara M. Murphy (Brown University)H-Index: 11
#2Tim Janssen (Brown University)H-Index: 11
Last. Kristina M. Jackson (Brown University)H-Index: 34
view all 4 authors...
1 CitationsSource
#1Lauren Micalizzi (Brown University)H-Index: 2
#2Alexander W. Sokolovsky (Brown University)H-Index: 3
Last. Kristina M. Jackson (Brown University)H-Index: 34
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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 development of substance initiation and delinquency across adolescence. Participants were 6–8th graders (N = 1023; 52% female; 83% White; 87.8% non-Hisp...
1 CitationsSource
#1Molly MagillH-Index: 20
#2Tim JanssenH-Index: 11
Last. Suzanne M. ColbyH-Index: 51
view all 7 authors...
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#1Alexander W. Sokolovsky (Brown University)H-Index: 3
#2Tim Janssen (Brown University)H-Index: 11
Last. Kristina M. Jackson (Brown University)H-Index: 34
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Abstract 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 = 1023) were assessed six times between 2009 – 2015. The sample included participants who reported ever-sipping alcohol in at least one assessment who...
1 CitationsSource
#1Sarah A. Helseth (Brown University)H-Index: 5
#2Tim Janssen (Brown University)H-Index: 11
Last. Sara J. Becker (Brown University)H-Index: 12
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Abstract 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 multi-site opioid use disorder program. Hypotheses predicted that providers who received the SSL implementation strategy would 1) adopt CM faster...
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