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2022

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Predicting Sexual Offense Treatment Completion Through Specific Responsivity Factors, Blain Cameron Stumpf Jan 2022

Predicting Sexual Offense Treatment Completion Through Specific Responsivity Factors, Blain Cameron Stumpf

Doctor of Psychology (PsyD)

Sexual offending is a serious, harmful, and costly behavior that impacts the safety of a community (Barros et al., 2020; Peterson et al., 2017; Severson & Pettus-Davis, 2013). To improve community safety and reduce further harm, several specialized treatments have been developed to rehabilitate individuals convicted of a sexual offense (ICSO). Recent meta-analytic studies have suggested that specialized cognitive-behavioral treatments for ICSO do in fact lead to a reduction in sexual recidivism (Gannon et al., 2019; Harrison et al., 2020; Kim et al., 2016). To increase engagement with and completion of treatment programs, and subsequently to reduce the risk of …


Lay Perceptions Of Treating Mental Illness With Psychedelic Assisted Therapy, Dèjah Barksdale, Emily Pica Jan 2022

Lay Perceptions Of Treating Mental Illness With Psychedelic Assisted Therapy, Dèjah Barksdale, Emily Pica

Modern Psychological Studies

With roughly 44.7 million individuals struggling with mental health problems, it is important that new methods of treatment are explored. Currently, the primary method of treatment is Selective Serotonin Reuptake Inhibitors (SSRIs) for disorders such as: anxiety, depression, and post-traumatic stress disorder (PTSD), but they also provide many detrimental side effects and only decrease symptomology for a short period of time. However, the interest and enthusiasm of many researchers has led to uncovering the true benefits of utilizing psychedelic drugs as a leading treatment for mental health problems. Participants (N = 474) were given a questionnaire regarding their knowledge of …


Legal Issues In Tribal E-Commerce, Adam Crepelle Jan 2022

Legal Issues In Tribal E-Commerce, Adam Crepelle

American University Business Law Review

No abstract provided.


An Originalist Victory, J. Joel Alicea Jan 2022

An Originalist Victory, J. Joel Alicea

Scholarly Articles

Roe v. Wade and Planned Parenthood v. Casey are no more. Like Plessy v. Ferguson before them, Roe and Casey were constitutionally and morally indefensible from the day they were decided, yet they endured for generations, becoming the foundation of a mass political movement that did all it could to prevent their overruling. Thus, like the overruling of Plessy, the overruling of Roe and Casey was by no means inevitable; it was the result of a half-century of disciplined, persistent, and prudent political, legal, and religious effort. The victory in Dobbs v. Jackson Women’s Health Organization was earned by …


The Role Of Adoption In Dobbs-Era Pro-Life Policy, Elizabeth Kirk Jan 2022

The Role Of Adoption In Dobbs-Era Pro-Life Policy, Elizabeth Kirk

Scholarly Articles

It is incumbent upon those who wish to provide alternatives to abortion for pregnant women to advance policies that highlight the unique gifts of adoption in a way that ensures it is a meaningful option. Of course, there are many venues for this to occur, whether in education, media, advertising, private initiative, or legislation. The particular policy appropriate for each state will depend on many factors, including the availability of legal abortion.


Religious Liberty And Judicial Deference, Mark L. Rienzi Jan 2022

Religious Liberty And Judicial Deference, Mark L. Rienzi

Scholarly Articles

Many of the Supreme Court’s most tragic failures to protect constitutional rights—cases like Plessy v. Ferguson, Buck v. Bell, and Korematsu v. United States—share a common approach: an almost insuperable judicial deference to the elected branches of government. In the modern era, this approach is often called “Thayerism,” after James Bradley Thayer, a nineteenth-century proponent of the notion that courts should not invalidate actions of the legislature as unconstitutional unless they were clearly irrational. Versions of Thayerism have been around for centuries, predating Thayer himself.

The Supreme Court took a decidedly Thayerian approach to the First Amendment in the first …


A Civil Shame: The Failure To Protect Due Process In Discretionary Immigration Bond Hearings, Stacy Brustin Jan 2022

A Civil Shame: The Failure To Protect Due Process In Discretionary Immigration Bond Hearings, Stacy Brustin

Scholarly Articles

Over the last four years, the US Supreme Court has granted certiorari in four immigration bond review cases. The sheer number of cases the Court has recently considered underscores the significance of this area of immigration law. Each case centers on whether the Immigration and Nationality Act or the Constitution mandates a bond review hearing after prolonged detention. Yet these cases leave unresolved the issue of whether initial bond hearings themselves meet the due process threshold required of civil confinement proceedings. Federal circuit and district courts have addressed aspects of this question and found procedural due process violations. However, most …


Long Covid And Medical Gaslighting: Dismissal, Delayed Diagnosis, And Deferred Treatment, Larry Au, Cristian Capotescu, Gil Eyal, Gabrielle Finestone Jan 2022

Long Covid And Medical Gaslighting: Dismissal, Delayed Diagnosis, And Deferred Treatment, Larry Au, Cristian Capotescu, Gil Eyal, Gabrielle Finestone

Publications and Research

While we know a lot more about Long Covid today, patients who were infected with Covid-19 early on in the pandemic and developed Long Covid had to contend with medical professionals who lacked awareness of the potential for extended complications from Covid-19. Long Covid patients have responded by labeling their contentious interactions with medical professionals, organizations, and the broader medical system as “gaslighting.” We argue that the charge of medical gaslighting can be understood as a form of ontological politics. Not only do patients demand that their version of reality be recognized, but they also blame the experts who hold …


A Comparative Study Of Immigration Integration Programs For Selected City Governments In California, Oregon, Washington, And Texas, Christelle Lorenzana Jan 2022

A Comparative Study Of Immigration Integration Programs For Selected City Governments In California, Oregon, Washington, And Texas, Christelle Lorenzana

Master's Projects

Over the last eight decades, immigration into the United States has increased and has become a prominent political issue in the United States (Pew Research Center, 2015). Although the federal government is responsible for enforcing immigration laws, municipalities work with immigrants directly in a more supportive role. Currently, no national policy focuses on integration or welcoming immigrants to the urban community. In recent decades, the federal government has focused on immigration enforcement, border control, and what to do about the influx of undocumented immigrants entering the U.S. However, cities are working to develop their own programs, tools, and policies to …


Understanding Unrecognized Chicana Leadership: Adversity, Resilience, Healing, And Liberation, Blanca Tavera Jan 2022

Understanding Unrecognized Chicana Leadership: Adversity, Resilience, Healing, And Liberation, Blanca Tavera

Dissertations

The path to Chicana leadership is laced with struggle, adversity, and intergenerationaltrauma—but strengthened by resilience. This research focused on unrecognized Chicana leadership generated by adversity and in response to years, decades, and centuries of social injustices, inequities, and systematic oppression. Interviews and focus groups were conducted using a Chicana feminist epistemology lens and testimonio methodology. Culture, language, spirituality, and intuition were dominant factors in the research. From an intuitive knowing, the women of the study redefined notions of sacrifice, healing, resilience, leadership, and liberation. In modeling what their mothers and the women before them had done, they understood the embodiment …


“I Think I’Ve Always Thought I Have To Prove Myself”: Interpretations, Perceptions, And Teacher Sensemaking At A Distance, Rafael Zavala Jan 2022

“I Think I’Ve Always Thought I Have To Prove Myself”: Interpretations, Perceptions, And Teacher Sensemaking At A Distance, Rafael Zavala

Dissertations

This grounded theory, constant comparative method study provides a Critical Race Institutional Logics Perspective account of Latina teacher sensemaking of distance learning. Distance learning—while not a particularly new school initiative, school reform effort, or organizational change—brought forth an organizational change that unmasked racist systems and deficit policy models perpetuating persistent, pervasive, disproportionate, low academic achievement for Latinx students. This study looked at how Latina teachers made sense of and enacted distance learning from their own personal values, beliefs, perceptions, and or impressions. Particularly, this study analyzed the role of race and its effects in shaping Latina teacher practice through these …


Liquid Core Detection And Strand Condition Monitoring In A Continuous Caster Using Optical Fiber, Deva Prasaad Neelakandan, Dinesh Reddy Alla, Jie Huang, Ronald J. O'Malley Jan 2022

Liquid Core Detection And Strand Condition Monitoring In A Continuous Caster Using Optical Fiber, Deva Prasaad Neelakandan, Dinesh Reddy Alla, Jie Huang, Ronald J. O'Malley

PSMRC Faculty Research

Real-time monitoring of the liquid core position during the continuous casting of steel has been demonstrated using low-cost distributed optical-fiber-based strain sensors. These sensors were installed on the containment roll support structures in the segments of a production continuous caster to detect the position of the solid–liquid interface and monitor the strand condition during the continuous casting. Distributed Fiber Bragg Grating sensors (FBGs) were used in this work to monitor strain at six roll positions in the caster. The sensor performance was first validated by comparing optical strain measurements with conventional strain gauge measurements in the lab. Next, optical strain …


Assessing The Two Tests Courts Use To Determine Dischargeability Of Student Loan Debt, Sean B. King Jan 2022

Assessing The Two Tests Courts Use To Determine Dischargeability Of Student Loan Debt, Sean B. King

Bankruptcy Research Library

(Excerpt)

The purpose of bankruptcy is to give honest debtors a “fresh start.” For debtors with student loans this purpose is not automatic, rather, the viability of the student loan programs takes precedence. For student loans, the default rule is they are not dischargeable in bankruptcy. Title 11 of the United States Code (the “Bankruptcy Code”) spells this out. Under section 523(a)(8) of the Bankruptcy Code, student loans must create an “undue hardship” to be discharged.

The issue is how courts determine undue hardship under section 523(a)(8). The term “undue hardship” is not defined in the Bankruptcy Code, rather, it …


Age As A Factor In Determining Discharge Of A Debtor’S Student Loan Debt, Julia Merani Jan 2022

Age As A Factor In Determining Discharge Of A Debtor’S Student Loan Debt, Julia Merani

Bankruptcy Research Library

(Excerpt)

Title 11 of the United States Code (the “Bankruptcy Code”) provides for debtors a “fresh start” by allowing the discharge of most debt. To obtain a discharge of student loan debt, a debtor must demonstrate “undue hardship.” If the debt is not discharged, it must still be paid. The phrase “undue hardship” is not defined in the “Bankruptcy Code and congressional record provides little guidance as to what constitutes undue hardship . . . .” Even though Congress created a single standard for discharging student loan debt; the circuit courts have adopted different tests to determine if the undue …


Are Nonconsensual Third-Party Releases Acceptable In United States Courts, Megan O’Connor Jan 2022

Are Nonconsensual Third-Party Releases Acceptable In United States Courts, Megan O’Connor

Bankruptcy Research Library

(Excerpt)

Under Title 11 of the United States Code (the “Bankruptcy Code”), a debtor will generally be released or discharged from certain liabilities. In addition, a plan confirmed under Chapter 11 of the Bankruptcy Code may provide for a “third-party release,” pursuant to which a non-debtor, like a senior officer or shareholder, may be released from certain liabilities by creditors. There is currently a split between United States Courts of Appeals regarding the scope of who can be bound by a release by creditors: some courts permit such a release in the plan where each creditor has affirmatively consented to …


A Transformative Framework To Investigate The Influences Of Chineseness On Chinese International Students’ Learning Experiences On U.S. College Campuses, Wenjin Guo Jan 2022

A Transformative Framework To Investigate The Influences Of Chineseness On Chinese International Students’ Learning Experiences On U.S. College Campuses, Wenjin Guo

Dissertations

This study applied a mixed-methods, social-justice approach to explore how Chinese international students interpret their success and/or challenges influenced by their Chinese forms of community cultural wealth in their academic learning at a predominately White Catholic university in the Midwest of the United States for over one year. I adopted a transformative paradigm to guide my study. Since the reviewed theoretical frameworks solely failed to form a profound comprehension of how Chineseness influenced Chinese international college students, I analyzed essential components of socio-cultural and critical race theories and created China as Method as the framework to guide my study.

This …


Understanding The Process Of Health Goal Achievement Among Black Men Who Have Sex With Men (Msm) In Chicago: An Exploratory Qualitative Study, Anthony Johnson Jan 2022

Understanding The Process Of Health Goal Achievement Among Black Men Who Have Sex With Men (Msm) In Chicago: An Exploratory Qualitative Study, Anthony Johnson

Dissertations

Background: Over the last 30 years, Black men who have sex with men (MSM) have been disproportionately affected by HIV/AIDS while accounting for only approximately 1% of the population of the United States. The majority of research with Black MSM has focused on HIV infection risk factors, but very little attention has been given to their overall health and well-being. The breadth of HIV-health related research that includes Black MSM tends to demonstrate high levels of racial, environmental, and economic disparities that need to be addressed. However, more research must be conducted to explicate the process of exercising strength and …


Differences In Health Literacy And Healthcare Utilization For Uninsured Patients With Type Ii Diabetes, Whitney Key Towey Jan 2022

Differences In Health Literacy And Healthcare Utilization For Uninsured Patients With Type Ii Diabetes, Whitney Key Towey

Dissertations

Un- and under-insured individuals have lower access and less health literacy than their insured counterparts. This is a major public health problem as lower health literacy leads to unhealthy communities which have higher chronic disease rates. This quantitative dissertation uses data from a public health hospital system to understand the relationship between health literacy and healthcare utilization. The Andersen Model has been applied to determine whether, or to what extent, health literacy explains the relationship between the identified predisposing and enabling factors and the outcomes of appropriate utilization of care by controlling for variables associated with health literacy. A sample …


Rhodium-Catalyzed Decarbonylation Of Aroyl Chlorides, Wiktoria M. Koza Jan 2022

Rhodium-Catalyzed Decarbonylation Of Aroyl Chlorides, Wiktoria M. Koza

Dissertations

The development of efficient strategies for the synthesis of aryl–halogen bonds is highly desirable due to the prevalence of these moieties in pharmaceuticals, agrochemicals, and organic synthesis. Although there are numerous applications of aryl chlorides in chemistry, an efficient strategy for the preparation of these molecules is underdeveloped. Transition metal-catalyzed decarbonylation provides an efficient and selective approach for aryl–halogen bond formation. There has been significant progress in the development of new decarbonylation strategies, particularly involving aldehydes for the synthesis of new carbon–hydrogen (C–H) bonds or for cross-coupling reactions. However, transition metal-catalyzed decarbonylation methods for carbon–halogen (C–X) bond formation have been …


Comparison Of First-Time Neurocognitive Baseline Cognigram Assessments Between American And Brazilian Professional Bull Riding Athletes, Peter Wang Jan 2022

Comparison Of First-Time Neurocognitive Baseline Cognigram Assessments Between American And Brazilian Professional Bull Riding Athletes, Peter Wang

University of the Pacific Theses and Dissertations

The purpose of this study was to compare the first-time neurocognitive concussion baseline outcomes, using the Cognigram assessment software, between American and Brazilian professional bull riders. The analysis was performed using the database provided by the Professional Bull Riding Association Sports Medicine staff. The Cognigram assessment measures and analyses four outcomes: Psychomotor Function, Attention, Learning, and Working Memory Speed. The study examined the test outcomes of 210 professional bull riders (150 American, 60 Brazilian). A one-way multivariate analysis of covariance (MANCOVA) was used to determine if there a significant difference in the four assessment outcomes when comparing the country of …


Peripherally Restricted Opioid Conjugates And Its Use As Pharmacological Probes And Potential Therapeutics, Md Tariqul Haque Tuhin Jan 2022

Peripherally Restricted Opioid Conjugates And Its Use As Pharmacological Probes And Potential Therapeutics, Md Tariqul Haque Tuhin

University of the Pacific Theses and Dissertations

Opioid-induced constipation (OIC) is one of the major adverse effects of opioid analgesics used by millions of patients each year. While progress has been made, there remains a significant unmet medical need in the treatment of OIC. Major gaps remain in our understanding of the role of the gastrointestinal tract and central nervous system (CNS) in precipitating OIC. For the last four decades, numerous investigations to study the sites of action of opioid analgesics have utilized peripherally acting mu-opioid receptor antagonists (PAMORAs), which have been incorrectly believed to have limited penetration across the blood-brain barrier (BBB). Several preclinical and clinical …


Maternal-Fetal Attachment And Its Relationship To Quality Of Life In Pregnant Women With Diabetes, Cheryl Ann Angel Jan 2022

Maternal-Fetal Attachment And Its Relationship To Quality Of Life In Pregnant Women With Diabetes, Cheryl Ann Angel

Dissertations

Background: Maternal-fetal attachment (MFA) is the bond between a mother and her unborn child during pregnancy. Pregnant women with diabetes are considered high-risk and their numbers are expected to increase as levels of obesity rise and women wait longer to have children. This researcher has observed health care providers instructing pregnant women with diabetes about diabetes self-management (DSM) activities such as “dietary management” and encouraging the women to make those changes for their baby. However, some women remained unable to successfully engage in DSM behaviors despite having exhibited signs of MFA, e.g., expressing “thoughts of the fetus” to health care …


B Cells In The Gut Associated Lymphoid Tissue (Galt), Ameera Bukhari Jan 2022

B Cells In The Gut Associated Lymphoid Tissue (Galt), Ameera Bukhari

Dissertations

The gut-associated lymphoid tissue (GALT) is the largest mass of lymphoid tissue in the body, and it is a unique line of defense where immune cells are in constant contact with gut commensals and pathogens. B lymphocytes constitute most of the lymphatic tissues of the gastrointestinal (GI) tract and they play a critical role in protecting from infections, promoting tolerance, and shaping microbiota in the gut through the production of immunoglobulins (Ig). Previous studies on GALT B cells in human showed that large B cell clones in the body partition into two broad networks: one includes the blood, bone marrow, …


The Role Of Lived Experiences In Culturally Responsive School Leaders’ Administrations: A Phenomenological Case Study, Angela Dolezal Jan 2022

The Role Of Lived Experiences In Culturally Responsive School Leaders’ Administrations: A Phenomenological Case Study, Angela Dolezal

Dissertations

This phenomenological case study explored how the lived experiences of three self-identifiedculturally responsive high school leaders impacted the systemic decisions they made for their school and their students. The study also investigated how these lived experiences informed the leaders’ responses to their stakeholders’ reactions to the systemic decisions. The three school leaders participated in a three-part interview series to answer these three questions (1) What are the personal and educational life histories of three self-identified culturally responsive school leaders in a predominantly White school? (2) How do the life experiences described in the self-identified culturally responsive school leaders’ life histories …


An Interpretive Phenomenological Study Of Women’S Struggles, Hopes And Reasons For Participation In Professional Power-Based Community Organizing In Chicago, Mary Dungy-Akenji Jan 2022

An Interpretive Phenomenological Study Of Women’S Struggles, Hopes And Reasons For Participation In Professional Power-Based Community Organizing In Chicago, Mary Dungy-Akenji

Dissertations

Mary K. L. DungyLoyola University Chicago AN INTERPRETIVE PHENOMENOLOGICAL STUDY OF WOMEN’S STRUGGLES, HOPES AND REASONS FOR PARTICIPATION IN PROFESSIONAL POWER-BASED COMMUNITY ORGANIZING IN CHICAGO Professional power-based community organizing is a practice of grassroots change in which paid organizers guide community members as they band together to make demands on elite groups to redistribute resources (Bobo et. al, 2001; Sites et al., 2007). Conflict-based tactics may be utilized to demand structural improvements from key stakeholders, usually towards progressive political ends that build towards a more just society (Bobo et. al 2001; Wilkinson & D’Angelo, 2019). Community organizing has some roots …


Reclaiming The Patria: Sinarquismo In The United States, 1936-1966, Nathan Ellstrand Jan 2022

Reclaiming The Patria: Sinarquismo In The United States, 1936-1966, Nathan Ellstrand

Dissertations

This dissertation examines the rise and fall of the Catholic, nationalist, and anti-communist Mexican Unión Nacional Sinarquista (UNS or National Synarchist Union) in the U.S. between 1936 and the 1960s. Whereas most scholars study the UNS as a Mexico-specific movement, I examine the organization as a transnational one. This project not only adds to the literature on the UNS, but in Mexican American, Western, and postrevolutionary Mexican history. The individuals that became sinarquistas found refuge from the Mexican church-state conflict in the U.S. in places such as Texas, California, and Chicagoland. The organization’s leadership therefore envisioned an expanded Mexico wherever …


Harnessing The Power Of Interdisciplinary Research With Psychology-Informed Cyberbullying Detection Models, Deborah Hall, Yasin N. Silva, Brittany Wheeler, Lu Cheng, Katie Baumel Jan 2022

Harnessing The Power Of Interdisciplinary Research With Psychology-Informed Cyberbullying Detection Models, Deborah Hall, Yasin N. Silva, Brittany Wheeler, Lu Cheng, Katie Baumel

Computer Science: Faculty Publications and Other Works

Cyberbullying has become increasingly prevalent, particularly on social media. There has also been a steady rise in cyberbullying research across a range of disciplines. Much of the empirical work from computer science has focused on developing machine learning models for cyberbullying detection. Whereas machine learning cyberbullying detection models can be improved by drawing on psychological theories and perspectives, there is also tremendous potential for machine learning models to contribute to a better understanding of psychological aspects of cyberbullying. In this paper, we discuss how machine learning models can yield novel insights about the nature and defining characteristics of cyberbullying and …


Gut Dysbiosis In Cutaneous T-Cell Lymphoma Is Characterized By Shifts In Relative Abundances Of Specific Bacterial Taxa And Decreased Diversity In More Advanced Disease, Madeline J. Hooper, T.M. Lewitt, Y. Pang, F.L. Veon, G.E Chlipala, L. Feferman, S.J. Green, D. Sweeney, K.T. Bagnowski, Michael B. Burns, P.C. Seed, J. Choi, J. Guitart, X.A. Zhou Jan 2022

Gut Dysbiosis In Cutaneous T-Cell Lymphoma Is Characterized By Shifts In Relative Abundances Of Specific Bacterial Taxa And Decreased Diversity In More Advanced Disease, Madeline J. Hooper, T.M. Lewitt, Y. Pang, F.L. Veon, G.E Chlipala, L. Feferman, S.J. Green, D. Sweeney, K.T. Bagnowski, Michael B. Burns, P.C. Seed, J. Choi, J. Guitart, X.A. Zhou

Biology: Faculty Publications and Other Works

Background Cutaneous T-cell lymphoma (CTCL) patients often suffer from recurrent skin infections and profound immune dysregulation in advanced disease. The gut microbiome has been recognized to influence cancers and cutaneous conditions; however, it has not yet been studied in CTCL.ObjectivesTo investigate the gut microbiome in patients with CTCL and in healthy controls.MethodsA case-control study was conducted between January 2019 and November 2020 at Northwestern’s busy multidisciplinary CTCL clinic (Chicago, Illinois, USA) utilizing 16S ribosomal RNA gene amplicon sequencing and bioinformatics analyses to characterize the microbiota present in fecal samples of CTCL patients (n = 38) and age-matched healthy controls (n …


Runoff And Discharge Pathways Of Microplastics Into Freshwater Ecosystems: A Systematic Review And Meta-Analysis, J. Wang, K. Bucci, P. A. Helm, T. Hoellein, M. J. Hoffman, R. Rooney, C. M. Rochman Jan 2022

Runoff And Discharge Pathways Of Microplastics Into Freshwater Ecosystems: A Systematic Review And Meta-Analysis, J. Wang, K. Bucci, P. A. Helm, T. Hoellein, M. J. Hoffman, R. Rooney, C. M. Rochman

Biology: Faculty Publications and Other Works

Although many studies have focused on the importance of littering and (or) illegal dumping as a source of plastic pollution to freshwater, other relevant pathways should be considered, including wastewater, stormwater runoff, industrial effluent/runoff, and agricultural runoff. Here, we conducted a meta-analysis focused on these four pathways. We quantified the number of studies, amount and characteristics of microplastics reported, and the methods used to sample and measure microplastics from each pathway. Overall, we found 121 studies relevant to our criteria, published from 2014 to 2020. Of these, 54 (45%) quantified and characterized microplastics in discharge pathways. Although most focused on …


Microplastic Accumulation In Riverbed Sediment Via Hyporheic Exchange From Headwaters To Mainstems, Jennifer D. Drummond, Uwe Schneidewind, Angang Li, Timothy J. Hoellein, Stefan Krause, Aaron I. Packman Jan 2022

Microplastic Accumulation In Riverbed Sediment Via Hyporheic Exchange From Headwaters To Mainstems, Jennifer D. Drummond, Uwe Schneidewind, Angang Li, Timothy J. Hoellein, Stefan Krause, Aaron I. Packman

Biology: Faculty Publications and Other Works

In rivers, small and lightweight microplastics are transported downstream, but they are also found frequently in riverbed sediment, demonstrating long-term retention. To better understand microplastic dynamics in global rivers from headwaters to mainstems, we developed a model that includes hyporheic exchange processes, i.e., transport between surface water and riverbed sediment, where microplastic retention is facilitated. Our simulations indicate that the longest microplastic residence times occur in headwaters, the most abundant stream classification. In headwaters, residence times averaged 5 hours/km but increased to 7 years/km during low-flow conditions. Long-term accumulation for all stream classifications averaged ~5% of microplastic inputs per river …