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Anhedonia in flux: Understanding the associations of emotion regulation and anxiety with anhedonia dynamics in a sample with major depressive disorder
Negative rumination and emotion regulation difficulties have been consistently linked with depression. Despite anhedonia—the lack of …
Michael R. Gallagher, Amanda C. Collins, Damien Lekkas, Matthew D. Nemesure, Tess Z Griffin, George D. Price, Michael V. Heinz, Arvind Pillai, Subigya Nepal, Daniel M. Mackin, Andrew T. Campbell, E. Samuel Winer, Nicholas C. Jacobson
PDF DOI
Breaking the silence: Leveraging social interaction data to identify high-risk suicide users online using network analysis and machine learning
Suicidal thought and behavior (STB) is highly stigmatized and taboo. Prone to censorship, yet pervasive online, STB risk detection may …
Damien Lekkas, Nicholas C. Jacobson
PDF DOI
Breaking the silence: Leveraging social interaction data to identify high-risk suicide users online using network analysis and machine learning
Detecting longitudinal trends between passively collected phone use and anxiety among college students

Introduction: Existing theories and empirical works link phone use with anxiety; however, most leverage subjective self-reports of …
Joseph A. Gyorda, Damien Lekkas, Nicholas C. Jacobson
PDF DOI
Detecting longitudinal trends between passively collected phone use and anxiety among college students
Evaluating a mobile app’s effects on depression and anxiety in medication-treated opioid use disorder
Depression and anxiety frequently co-occur with opioid use disorder (OUD) yet are often overlooked in standard OUD treatments. This …
Michael V. Heinz, Damien Lekkas, Veronica Abreu, Camilla Lee, Lisa A. Marsch, Nicholas C. Jacobson
PDF DOI
Evaluating a mobile app’s effects on depression and anxiety in medication-treated opioid use disorder
From mood to use: Using ecological momentary assessments to examine how anhedonia and depressed mood impact cannabis use in a depressed sample
Anhedonia and depressed mood are two cardinal symptoms of major depressive disorder (MDD). Prior work has demonstrated that cannabis …
Amanda C. Collins, Damien Lekkas, Cara A. Struble, Brianna M. Trudeau, Abi D. Jewett, Tess Z Griffin, Matthew D. Nemesure, George D. Price, Michael V. Heinz, Subigya Nepal, Arvind Pillai, Daniel M. Mackin, Andrew T. Campbell, Alan T. Budney, Nicholas C. Jacobson
PDF DOI
From mood to use: Using ecological momentary assessments to examine how anhedonia and depressed mood impact cannabis use in a depressed sample
The role of borderline personality disorder traits in predicting longitudinal variability of major depressive symptoms among a sample of depressed adults

Background: Major depressive disorder (MDD) and borderline personality disorder (BPD) often co-occur, with 20 % of adults with MDD …
Emily A. Kline, Damien Lekkas, Anastasia Bryan, Matthew D. Nemesure, Tess Z Griffin, Amanda C. Collins, George D. Price, Michael V. Heinz, Subigya Nepal, Arvind Pillai, Andrew T. Campbell, Nicholas C. Jacobson
DOI
Comparing transdiagnostic risk factors: Predicting emergence of significant depressive, anxiety, and substance abuse symptoms among juvenile delinquents
In a 7-year 11-wave study of low-SES adolescents (N = 856, age = 15.98), we compared multiple well-established transdiagnostic risk …
Robert J. Klein, Damien Lekkas, Nhi D. Nguyen, Nicholas C. Jacobson
DOI
The trajectories of online mental health information seeking: Modeling search behavior before and after completion of self-report screens
There is an appreciable mental health treatment gap in the United States. Efforts to bridge this gap and improve resource accessibility …
Damien Lekkas, Elad Yom-Tov, Michael V. Heinz, Joseph A. Gyorda, Theresa Nguyen, Paul J. Barr, Nicholas C. Jacobson
PDF DOI
The trajectories of online mental health information seeking: Modeling search behavior before and after completion of self-report screens
Depressive symptoms as a heterogeneous and constantly evolving dynamical system: Idiographic depressive symptom networks of rapid symptom changes among persons with major depressive disorder.
Major depressive disorder (MDD) is conceptualized by individual symptoms occurring most of the day for at least two weeks. Despite this …
Matthew D. Nemesure, Amanda C. Collins, George D. Price, Tess Z Griffin, Arvind Pillai, Subigya K. Nepal, Michael V. Heinz, Damien Lekkas, Andrew T. Campbell, Nicholas C. Jacobson
DOI
The hidden depths of suicidal discourse: Network analysis and natural language processing unmask uncensored expression

Background: The socially unattractive and stigmatizing nature of suicidal thought and behavior (STB) makes it especially susceptible to …
Damien Lekkas, Nicholas C. Jacobson
PDF DOI
The hidden depths of suicidal discourse: Network analysis and natural language processing unmask uncensored expression