Psychiatry and Psychology Commons^™

The Rubber Hand Illusion: Top-Down Attention Modulates Embodiment, Rémi Thériault, Mathieu Landry, Amir Raz

Psychology Faculty Articles and Research

The Rubber Hand Illusion (RHI) creates distortions of body ownership through multimodal integration of somatosensory and visual inputs. This illusion largely rests on bottom-up (automatic multisensory and perceptual integration) mechanisms. However, the relative contribution from top-down factors, such as controlled processes involving attentional regulation, remains unclear. Following previous work that highlights the putative influence of higher-order cognition in the RHI, we aimed to further examine how modulations of working memory load and task instructions—two conditions engaging top-down cognitive processes—influence the experience of the RHI, as indexed by a number of psychometric dimensions. Relying on exploratory factor analysis for assessing this …

Consciousness Explained Or Described?, Aaron Schurger, Michael S. A. Graziano

Psychology Faculty Articles and Research

Consciousness is an unusual phenomenon to study scientifically. It is defined as a subjective, first-person phenomenon, and science is an objective, third-person endeavor. This misalignment between the means—science—and the end—explaining consciousness—gave rise to what has become a productive workaround: the search for ‘neural correlates of consciousness’ (NCCs). Science can sidestep trying to explain consciousness and instead focus on characterizing the kind(s) of neural activity that are reliably correlated with consciousness. However, while we have learned a lot about consciousness in the bargain, the NCC approach was not originally intended as the foundation for a true explanation of consciousness. Indeed, it …

Optimism And Lipid Profiles In Midlife: A 15-Year Study Of Black And White Adults, Farah Qureshi, Jackie Soo, Ying Chen, Brita Roy, Donald Lloyd-Jones, Laura D. Kubzansky, Julia K. Boehm

Psychology Faculty Articles and Research

Introduction

Optimism is associated with better cardiovascular health, yet little is known about the underlying mechanisms and whether protective relationships are consistently observed across diverse groups. This study examines optimism's association with lipid profiles over time and separately among Black and White men and women.

Methods

Data were from 3,206 middle-aged adults in the Coronary Artery Risk Development in Young Adults study. Optimism was measured in 2000–2001 using the Revised Life Orientation Test. Triglyceride, total cholesterol, high-density lipoprotein cholesterol, and low-density lipoprotein cholesterol measurements were obtained at 5-year intervals through 2015–2016. Linear mixed models evaluated relationships between optimism and …

Prenatal Exposure To Maternal Psychological Distress And Telomere Length In Childhood, Stephanie A. Stout-Oswald, Laura M. Glynn, Marco Bisoffi, Catherine H. Demers, Elysia Poggi Davis

Psychology Faculty Articles and Research

Telomere length (TL) is a biological marker of cellular aging, and shorter TL in adulthood is associated with increased morbidity and mortality risk. It is likely that these differences in TL are established long before adulthood, and there is growing evidence that TL can reflect prenatal experiences. Although maternal prenatal distress predicts newborn TL, it is unknown whether the relation between prenatal exposure to maternal distress and child TL persists through childhood. The purpose of the current longitudinal, prospective study is to examine the relation between prenatal exposure to maternal distress (perceived stress, depressive symptoms, pregnancy-related anxiety) and TL in …

Is More, Better? Relationships Of Multiple Psychological Well-Being Facets With Cardiometabolic Disease, Anna-Josée Guimond, Claudia Trudel-Fitzgerald, Julia K. Boehm, Farah Qureshi, Laura D. Kubzansky

Psychology Faculty Articles and Research

Objective: Cardiometabolic disease (CMD) is a leading cause of death and disability worldwide. Assessments of psychological well-being taken at one time point are linked to reduced cardiometabolic risk, but psychological well-being may change over time and how longitudinal trajectories of psychological well-being may be related to CMD risk remains unclear. Furthermore, psychological well-being is a multidimensional construct comprised of distinct facets, but no work has examined whether sustaining high levels of multiple facets may confer additive protection. This study tested if trajectories of four psychological well-being facets would be associated with lower risk of self-reported nonfatal CMD. Method: Participants were …

The Acute And Persisting Impact Of Covid-19 On Trajectories Of Adolescent Depression: Sex Differences And Social Connectedness, Sabrina R. Liu, Elyssia Poggi Davis, Anton M. Palma, Curt A. Sandman, Laura M. Glynn

Psychology Faculty Articles and Research

Background

The COVID-19 era is a time of unprecedented stress, and there is widespread concern regarding its short- and long-term mental health impact. Adolescence is a sensitive period for the emergence of latent psychopathology vulnerabilities, often activated by environmental stressors. The present study examined COVID-19′s impact on adolescent depression and possible influences of different domains of social connectedness (loneliness, social media use, social video game time, degree of social activity participation).

Methods

A community sample of 175 adolescents (51% boys, mean age = 16.01 years) completed questionnaires once before and twice during the COVID-19 pandemic. Piecewise growth modeling examined the …

Identifying App-Based Meditation Habits And The Associated Mental Health Benefits: Longitudinal Observational Study, Chad Stecher, Vincent Berardi, Ryan Fowers, Jaclyn Christ, Yunro Chung, Jennifer Huberty

Psychology Faculty Articles and Research

Background: Behavioral habits are often initiated by contextual cues that occur at approximately the same time each day; so, it may be possible to identify a reflexive habit based on the temporal similarity of repeated daily behavior. Mobile health tools provide the detailed, longitudinal data necessary for constructing such an indicator of reflexive habits, which can improve our understanding of habit formation and help design more effective mobile health interventions for promoting healthier habits.

Objective: This study aims to use behavioral data from a commercial mindfulness meditation mobile phone app to construct an indicator of reflexive meditation habits …

Characterizing Human Random-Sequence Generation In Competitive And Non-Competitive Environments Using Lempel-Ziv Complexity, Alice Wong, Garance Merholz, Uri Maoz

Psychology Faculty Articles and Research

The human ability for random-sequence generation (RSG) is limited but improves in a competitive game environment with feedback. However, it remains unclear how random people can be during games and whether RSG during games can improve when explicitly informing people that they must be as random as possible to win the game. Nor is it known whether any such improvement in RSG transfers outside the game environment. To investigate this, we designed a pre/post intervention paradigm around a Rock-Paper-Scissors game followed by a questionnaire. During the game, we manipulated participants’ level of awareness of the computer’s strategy; they were either …

Burstiness And Stochasticity In The Malleability Of Physical Activity, Vincent Berardi, David Pincus, Evan Walker, Marc A. Adams

Psychology Faculty Articles and Research

This study examined whether patterns of self-organization in physical activity (PA) predicted long-term success in a yearlong PA intervention. Increased moderate to vigorous PA (MVPA) was targeted in insufficiently active adults (N = 512) via goal setting and financial reinforcement. The degree to which inverse power law distributions, which are reflective of self-organization, summarized (a) daily MVPA and (b) time elapsed between meeting daily goals (goal attainment interresponse times) was calculated. Goal attainment interresponse times were also used to calculate burstiness, the degree to which meeting daily goals clustered in time. Inverse power laws accurately summarized interresponse times, but …

Dimensionality Reduction For Classification Of Object Weight From Electromyography, Elnaz Lashgari, Uri Maoz

Psychology Faculty Articles and Research

Electromyography (EMG) is a simple, non-invasive, and cost-effective technology for measuring muscle activity. However, multi-muscle EMG is also a noisy, complex, and high-dimensional signal. It has nevertheless been widely used in a host of human-machine-interface applications (electrical wheelchairs, virtual computer mice, prosthesis, robotic fingers, etc.) and, in particular, to measure the reach-and-grasp motions of the human hand. Here, we developed an automated pipeline to predict object weight in a reach-grasp-lift task from an open dataset, relying only on EMG data. In doing so, we shifted the focus from manual feature-engineering to automated feature-extraction by using pre-processed EMG signals and thus …

Racial/Ethnic Disparities In Alzheimer’S Disease Risk: Role Of Exposure To Ambient Fine Particles, Diane Younan, Xinhui Wang, Tara Gruenewald, Margaret Gatz, Marc L. Serre, William Vizuete, Meredith N. Braskie, Nancy F. Woods, Ka Kahe, Lorena Garcia, Fred Lurmann, Joann E. Manson, Helena C. Chui, Robert B. Wallace, Mark A. Espeland, Jiu-Chiuan Chen

Psychology Faculty Articles and Research

Background

Whether racial/ethnic disparities in Alzheimer’s disease (AD) risk may be explained by ambient fine particles (PM_2.5) has not been studied.

Methods

We conducted a prospective, population-based study on a cohort of Black (n=481) and White (n=6004) older women (aged 65-79) without dementia at enrollment (1995-98). Cox models accounting for competing risk were used to estimate the hazard ratio (HR) for racial/ethnic disparities in AD (1996-2010) defined by DSM-IV and the association with time-varying annual average PM_2.5 (1999-2010) estimated by spatiotemporal model.

Results

Over an average follow-up of 8.3 (±3.5) years with 158 incident cases (21 in …

Applying Theoretical Models Of Positive Emotion To Improve Pediatric Asthma: A Positive Psychology Approach, Brooke N. Jenkins, Judith T. Moskowitz, Jill Halterman, Zeev N. Kain

Psychology Faculty Articles and Research

Positive emotion, encompassing feelings such as joy and happiness, has been shown to predict a multitude of health outcomes. However, the role of positive emotion in pediatric asthma is not understood. No work to date has examined how positive emotion may offer benefits to children and adolescents with asthma. Based on theory and models of positive emotion and health, we hypothesize that positive emotion may improve asthma outcomes through mediators such as health behaviors and health-relevant physiological functioning. Moreover, boosting positive emotion during times of stress may be particularly relevant in mitigating asthma symptoms. In the present commentary, we elaborate …

Stair Versus Elevator Use In A University Residence Hall Setting, Vincent Berardi, Benjamin D. Rosenberg, Sophie Srivastava, Noah Estrada-Rand, Julia Frederick

Psychology Faculty Articles and Research

Objective

Determine the temporal and spatial characteristics of stairs versus elevator use in a university residence hall to inform future physical activity promotion efforts.

Participants

All residents and visitors for a single, four-story residence hall dormitory building located on a college campus in Orange, CA.

Methods

Smart mat systems capable of detecting pedestrian traffic were placed in front of the stairs and elevators on each floor plus a basement. Generalized additive mixed models (GAMMs) were used to compare stair versus elevator usage at different times of the day and on different floors.

Results

Stair versus elevator use varied much more …

What Is The Readiness Potential?, Aaron Schurger, Pengbo 'Ben' Hu, Joanna Pak, Adina L. Roskies

Psychology Faculty Articles and Research

The readiness potential (RP) has been widely interpreted to indicate preparation for movement and is used to argue that our brains decide before we do. It thus has been a fulcrum for discussion about the neuroscience of free will.

Recent computational models provide an alternative framework for thinking about the significance of the RP, suggesting instead that the RP is a natural result of the operation of a stochastic accumulator process of decision-making, analyzed by time-locking to threshold-crossing events.

These models call for a reevaluation of: (i) the ontological standing of the RP as reflecting a real, causally efficacious signal …

Positive Psychological Well‐Being And Cardiovascular Disease: Exploring Mechanistic And Developmental Pathways, Julia K. Boehm

Psychology Faculty Articles and Research

Empirical research regarding the health benefits of positive psychological well‐being (e.g., positive emotions, life satisfaction, purpose in life, and optimism) has flourished in recent years, particularly with regard to cardiovascular disease. This paper reviews the state of evidence for well‐being's association with cardiovascular disease in both healthy individuals and those diagnosed with a disease. Prospective studies consistently indicate well‐being reduces cardiovascular events in healthy and, to a lesser extent, patient populations. Potential pathways that link well‐being with cardiovascular disease are discussed (including health behaviors, physiological processes, and stress buffering), although the existing evidence is mostly cross‐sectional which limits conclusions about …

Super Placebos: A Feasibility Study Combining Contextual Factors To Promote Placebo Effects, Jay A. Olson, Michael Lifshitz, Amir Raz, Samuel P. L. Veissière

Psychology Faculty Articles and Research

Background: Ample evidence demonstrates that placebo effects are modulated by contextual factors. Few interventions, however, attempt to combine a broad range of these factors. Here, we explore the therapeutic power of placebos by leveraging factors including social proof, positive suggestion, and social learning. This study aimed to test the feasibility of an elaborate “super placebo” intervention to reduce symptoms of various disorders in a pediatric population.

Methods: In a single-arm qualitative study, participants entered an inactive MRI scanner which they were told could help their brain heal itself through the power of suggestion. The sample included 11 children (6–13 years …

Aberrant Maturation Of The Uncinate Fasciculus Follows Exposure To Unpredictable Patterns Of Maternal Signals, Steven J. Granger, Laura M. Glynn, Curt A. Sandman, Steven L. Small, Andre Obenaus, David B. Keator, Tallie Z. Baram, Hal S. Stern, Michael A. Yassa, Elyssia Poggi Davis

Psychology Faculty Articles and Research

Across species, unpredictable patterns of maternal behavior are emerging as novel predictors of aberrant cognitive and emotional outcomes later in life. In animal models, exposure to unpredictable patterns of maternal behavior alters brain circuit maturation and cognitive and emotional outcomes. However, whether exposure to such signals in humans alters the development of brain pathways is unknown. In mother–child dyads, we tested the hypothesis that exposure to more unpredictable maternal signals in infancy is associated with aberrant maturation of corticolimbic pathways. We focused on the uncinate fasciculus, the primary fiber bundle connecting the amygdala to the orbitofrontal cortex and a key …

Associations Between Daily Affect And Sleep Vary By Sleep Assessment Type: What Can Ambulatory Eeg Add To The Picture?, Brett Messman, Danica C. Slavish, Jessica R. Dietch, Brooke N. Jenkins, Maia Ten Brink, Daniel J. Taylor

Psychology Faculty Articles and Research

Objective/Background

Disrupted sleep can be a cause and a consequence of affective experiences. However, daily longitudinal studies show sleep assessed via sleep diaries is more consistently associated with positive and negative affect than sleep assessed via actigraphy. The objective of the study was to test whether sleep parameters derived from ambulatory electroencephalography (EEG) in a naturalistic setting were associated with day-to-day changes in affect.

Participants/Method

Eighty adults (mean age = 32.65 years, 63% female) completed 7 days of affect and sleep assessments. We examined bidirectional associations between morning positive affect and negative affect with sleep assessed via diary, actigraphy, and …

Prenatal Maternal Psychological Distress And Fetal Developmental Trajectories: Associations With Infant Temperament, Mariann A. Howland, Curt A. Sandman, Elyssia Poggi Davis, Laura M. Glynn

Psychology Faculty Articles and Research

Associations between prenatal maternal psychological distress and offspring developmental outcomes are well documented, yet relatively little research has examined links between maternal distress and development in utero, prior to postpartum influences. Fetal heart rate (FHR) parameters are established indices of central and autonomic nervous system maturation and function which demonstrate continuity with postnatal outcomes. This prospective, longitudinal study of 149 maternal–fetal pairs evaluated associations between prenatal maternal distress, FHR parameters, and dimensions of infant temperament. Women reported their symptoms of psychological distress at five prenatal visits, and FHR monitoring was conducted at the last three visits. Maternal report of infant …

A Predictable Home Environment May Protect Child Mental Health During The Covid-19 Pandemic, Laura M. Glynn, Elyssia Poggi Davis, Joan L. Luby, Tallie Z. Baram, Curt A. Sandman

Psychology Faculty Articles and Research

Objective

Information about the adverse effects of the COVID-19 pandemic on adolescent and adult mental health is growing, yet the impacts on preschool children are only emerging. Importantly, environmental factors that augment or protect from the multidimensional and stressful influences of the pandemic on emotional development of young children are poorly understood.

Methods

Depressive symptoms in 169 preschool children (mean age 4.1 years) were assessed with the Preschool Feelings Checklist during a state-wide stay-at-home order in Southern California. Mothers (46% Latinx) also reported on externalizing behaviors with the Strengths & Difficulties Questionnaire. To assess the role of environmental factors in …

Difficult Turned Easy: Suggestion Renders A Challenging Visual Task Simple, Mathieu Landry, Jason Da Silva Castanheira, Jérôme Sackur, Amir Raz

Psychology Faculty Articles and Research

Suggestions can cause some individuals to miss or disregard existing visual stimuli, but can they infuse sensory input with nonexistent information? Although several prominent theories of hypnotic suggestion propose that mental imagery can change our perceptual experience, data to support this stance remain sparse. The present study addressed this lacuna, showing how suggesting the presence of physically absent, yet critical, visual information transforms an otherwise difficult task into an easy one. Here, we show how adult participants who are highly susceptible to hypnotic suggestion successfully hallucinated visual occluders on top of moving objects. Our findings support the idea that, at …

Air Pollution And The Dynamic Association Between Depressive Symptoms And Memory In Oldest-Old Women, Andrew J. Petkus, Diana Younan, Xinhui Wang, Daniel P. Beavers, Mark A. Espeland, Margaret Gatz, Tara Gruenewald, Joel D. Kaufman, Helena C. Chui, Joann E. Manson, Susan M. Resnick, Gregory A. Wellenius, Eric A. Whitsel, Keith Widaman, Jiu-Chiuan Chen

Psychology Faculty Articles and Research

BACKGROUND/OBJECTIVES

Exposure to air pollution may contribute to both increasing depressive symptoms and decreasing episodic memory in older adulthood, but few studies have examined this hypothesis in a longitudinal context. Accordingly, we examined the association between air pollution and changes in depressive symptoms (DS) and episodic memory (EM) and their interrelationship in oldest-old (aged 80 and older) women.

DESIGN

Prospective cohort data from the Women's Health Initiative Memory Study-Epidemiology of Cognitive Health Outcomes.

SETTING

Geographically diverse community-dwelling population.

PARTICIPANTS

A total of 1,583 dementia-free women aged 80 and older.

MEASUREMENTS

Women completed up to six annual memory assessments (latent composite …

The Impact Of Parental Health Mindset On Postoperative Recovery In Children, Alexandra Kain, Claudia Mueller, Brenda J. Goliamu, Brooke N. Jenkins, Michelle A. Fortier

Psychology Faculty Articles and Research

Background

Mindset, or one’s beliefs about the ability to change one’s outcomes, has been studied in the educational domain but not in surgical settings. The purpose of this study was to examine the role of parental health mindset on children’s recovery.

Methods

Participants were part of a larger National Institutes of Health‐funded trial that included 1470 children undergoing outpatient tonsillectomy and adenoidectomy. We used measures of parental coping style (Monitor Blunter Style Scale; MBSS) and medication attitudes (Medication Attitudes Questionnaire; MAQ) to validate the Health Beliefs Scale (HBS; Criterion validity, Cohen’s kappa). HBS categorizes parents as having a growth mindset, …

Characterizing Prenatal Maternal Distress With Unique Prenatal Cortisol Trajectories, Gage Peterson, Emma V. Espel, Elyssia Poggi Davis, Curt A. Sandman, Laura M. Glynn

Psychology Faculty Articles and Research

Objective: It is widely assumed that glucocorticoids represent a primary mechanism through which exposure to adversity and maternal psychological distress shape prenatal developmental trajectories of both mother and fetus. However, despite repeated investigations and the fact that prenatal cortisol has been reliably linked to developmental outcomes, the empirical evidence supporting an association between prenatal cortisol and maternal distress is scarce. In this study, a novel approach to assessing links between maternal prenatal psychological distress and gestational cortisol profiles, general growth mixture modeling (GGMM), was applied. Method: Measures of pregnancy anxiety, perceived stress, and state anxiety and depressive symptoms as well …

Race, Ethnicity, And Insurance: The Association With Opioid Use In A Pediatric Hospital Setting, Louis Ehwerhemuepha, Candice D. Donaldson, Zeev N. Kain, Vivian Luong, Michelle A. Fortier, William Feaster, Michael Weiss, Daniel Tomaszewski, Sun Yang, Michael Phan, Brooke N. Jenkins

Psychology Faculty Articles and Research

Background

This study examined the association between race/ethnicity and health insurance payer type with pediatric opioid and non-opioid ordering in an inpatient hospital setting.

Methods

Cross-sectional inpatient encounter data from June 2013 to June 2018 was retrieved from a pediatric children’s hospital in Southern California (N = 55,944), and statistical analyses were performed to determine associations with opioid ordering.

Results

There was a significant main effect of race/ethnicity on opioid and non-opioid orders. Physicians ordered significantly fewer opioid medications, but a greater number of non-opioid medications, for non-Hispanic African American children than non-Hispanic Asian, Hispanic/Latinx, and non-Hispanic White pediatric …

Parent Responses To Pediatric Pain: The Differential Effects Of Ethnicity On Opioid Consumption, Candice D. Donaldson, Brooke N. Jenkins, Michelle A. Fortier, Michael T. Phan, Daniel M. Tomaszewski, Sun Yang, Zeev N. Kain

Psychology Faculty Articles and Research

Objective

Within the context of the United States opioid epidemic, some parents often fear the use of opioids to help manage their children's postoperative pain. As a possible consequence, parents often do not dispense optimal analgesic medications to their children after surgery, putting their children at risk of suffering from postsurgical pain. The objective of this research was to assess ethnicity as a predictor of both pain and opioid consumption, and to examine how Hispanic/Latinx and Non-Hispanic White parents alter their child's opioid consumption in response to significant postsurgical pain.

Methods

Participants were 254 children undergoing outpatient tonsillectomy and/or adenoidectomy …

Optimism And Risk Of Incident Hypertension: A Target For Primordial Prevention, Laura D. Kubzansky, Julia K. Boehm, Andrew R. Allen, Loryana L. Vie, Tiffany E. Ho, Claudia Trudel-Fitzgerald, Hayami K. Koga, Lawrence M. Scheier, Martin E. P. Seligman

Psychology Faculty Articles and Research

Aims

Optimism is associated with reduced cardiovascular disease risk; however, few prospective studies have considered optimism in relation to hypertension risk specifically. We investigated whether optimism was associated with a lower risk of developing hypertension in U.S. service members, who are more likely to develop high blood pressure early in life. We also evaluated race/ethnicity, sex and age as potential effect modifiers of these associations.

Methods

Participants were 103 486 hypertension-free U.S. Army active-duty soldiers (mean age 28.96 years, 61.76% White, 20.04% Black, 11.01% Hispanic, 4.09% Asian, and 3.10% others). We assessed optimism, sociodemographic characteristics, health conditions, health behaviours and …

Data Augmentation For Deep-Learning-Based Electroencephalography, Elnaz Lashgari, Dehua Liang, Uri Maoz

Psychology Faculty Articles and Research

Background

Data augmentation (DA) has recently been demonstrated to achieve considerable performance gains for deep learning (DL)—increased accuracy and stability and reduced overfitting. Some electroencephalography (EEG) tasks suffer from low samples-to-features ratio, severely reducing DL effectiveness. DA with DL thus holds transformative promise for EEG processing, possibly like DL revolutionized computer vision, etc.

New method

We review trends and approaches to DA for DL in EEG to address: Which DA approaches exist and are common for which EEG tasks? What input features are used? And, what kind of accuracy gain can be expected?

Results

DA for DL on EEG begun …

Sense Of Purpose In Life And Five Health Behaviors In Older Adults, Eric S. Kim, Koichiro Shiba, Julia K. Boehm, Laura D. Kubzansky

Psychology Faculty Articles and Research

Accumulating evidence shows that a higher sense of purpose in life is associated with lower risk of chronic conditions and premature mortality. Health behaviors might partially explain these findings, however, the prospective association between sense of purpose and health behaviors is understudied. We tested whether a higher sense of purpose at baseline was associated with lower likelihood of developing unhealthy behaviors over time. Prospective data were from the Health and Retirement Study, a national sample of U.S. older adults. Our sample included 13,770 adults assessed up to five times across eight years. Among people who met recommended guidelines for a …

A Comprehensive Examination Of The Immediate Recovery Of Children Following Tonsillectomy And Adenoidectomy, Bryan K. Lao, Zeev N. Kain, Dina Khoury, Brooke N. Jenkins, Jeremy Prager, Robert S. Stevenson, Brenda Golianu, Jeannie Zuk, Jeffrey I. Gold, Qiu Zhong, Michelle A. Fortier

Psychology Faculty Articles and Research

Objectives

Using multiple well-validated measures and a large sample size, the goal of this paper was to describe the immediate clinical and behavioral recovery of children following tonsillectomy with or without an adenoidectomy (T&A) during the first two weeks following surgery.

Study design

Observational, longitudinal study.

Setting

Four major pediatric hospitals in the U.S. consisting of Children's Hospital of Orange County, Children's Hospital of Los Angeles, Lucile Packard Children's Hospital, and Children's Hospital Colorado.

Subjects

and Methods: Participants included 827 patients between 2 and 15 years of age who underwent tonsillectomy with or without adenoidectomy surgery. Baseline and demographic …