Psychology Faculty Research and Publications

Exploring Body Comparison Tendencies: Women Are Self-Critical Whereas Men Are Self-Hopeful

Stephen L. Franzoi et al. — Wed, 27 Feb 2013 08:14:15 PST

Our study examined similarities and differences in women’s and men’s comparison tendencies and perfection beliefs when evaluating their face, body shape, and physical abilities, as well as how these tendencies and beliefs relate to their body esteem. College students (90 women and 88 men) completed the Body Esteem Scale (Franzoi & Shields, 1984) and answered questions concerning their social comparison and temporal comparison tendencies related to face, body shape, and physical abilities evaluations as well as personal perfection body beliefs. As predicted, women were more likely than men to compare their face and bodies to other same-sex persons whom they perceived as having either similar or better physical qualities than themselves in those body domains, with their most likely comparison tendency being upward social comparison. More men than women held body-perfection beliefs for all three body domains, and men were most likely to rely on future temporal comparison when evaluating their body shape. Comparison tendencies and perfection beliefs also were differentially related to women's and men's body esteem; whereas women rely on self-critical social comparison strategies associated with negative body esteem, men’s comparison strategies and perfection beliefs are more self-hopeful. Implications for practitioners treating body-image issues are discussed.

Neuropsychological Outcomes of U.S. Veterans with Report of Remote Blast-Related Concussion and Current Psychopathology

Nathaniel W. Nelson et al. — Fri, 01 Feb 2013 09:13:57 PST

This study explored whether remote blast-related MTBI and/or current Axis I psychopathology contribute to neuropsychological outcomes among OEF/OIF veterans with varied combat histories. OEF/OIF veterans underwent structured interviews to evaluate history of blast-related MTBI and psychopathology and were assigned to MTBI (n = 18), Axis I (n = 24), Co-morbid MTBI/Axis I (n = 34), or post-deployment control (n = 28) groups. A main effect for Axis I diagnosis on overall neuropsychological performance was identified (F(3,100) = 4.81; p = .004), with large effect sizes noted for the Axis I only (d = .98) and Co-morbid MTBI/Axis I (d = .95) groups relative to the control group. The latter groups demonstrated primary limitations on measures of learning/memory and processing speed. The MTBI only group demonstrated performances that were not significantly different from the remaining three groups. These findings suggest that a remote history of blast-related MTBI does not contribute to objective cognitive impairment in the late stage of injury. Impairments, when present, are subtle and most likely attributable to PTSD and other psychological conditions. Implications for clinical neuropsychologists and future research are discussed. (JINS, 2012, 18, 1–11)

Functional Magnetic Resonance Imaging of Semantic Memory as a Presymptomatic Biomarker of Alzheimer’s Disease Risk

Michael Sugarman et al. — Fri, 25 Jan 2013 08:23:32 PST

Extensive research efforts have been directed toward strategies for predicting risk of developing Alzheimer's disease (AD) prior to the appearance of observable symptoms. Existing approaches for early detection of AD vary in terms of their efficacy, invasiveness, and ease of implementation. Several non-invasive magnetic resonance imaging strategies have been developed for predicting decline in cognitively healthy older adults. This review will survey a number of studies, beginning with the development of a famous name discrimination task used to identify neural regions that participate in semantic memory retrieval and to test predictions of several key theories of the role of the hippocampus in memory. This task has revealed medial temporal and neocortical contributions to recent and remote memory retrieval, and it has been used to demonstrate compensatory neural recruitment in older adults, apolipoprotein E ε4 carriers, and amnestic mild cognitive impairment patients. Recently, we have also found that the famous name discrimination task provides predictive value for forecasting episodic memory decline among asymptomatic older adults. Other studies investigating the predictive value of semantic memory tasks will also be presented. We suggest several advantages associated with the use of semantic processing tasks, particularly those based on person identification, in comparison to episodic memory tasks to study AD risk. Future directions for research and potential clinical uses of semantic memory paradigms are also discussed. This article is part of a Special Issue entitled: Imaging Brain Aging and Neurodegenerative disease.

Memory Modulation in the Classroom: Selective Enhancement of College Examination Performance by Arousal Induced after Lecture

Kristy Nielson et al. — Wed, 23 Jan 2013 10:20:33 PST

Laboratory studies examining moderate physiological or emotional arousal induced after learning indicate that it enhances memory consolidation. Yet, no studies have yet examined this effect in an applied context. As such, arousal was induced after a college lecture and its selective effects were examined on later exam performance. Participants were divided into two groups who either watched a neutral video clip (n = 66) or an arousing video clip (n = 70) after lecture in a psychology course. The final examination occurred two weeks after the experimental manipulation. Only performance on the group of final exam items that covered material from the manipulated lecture were significantly different between groups. Other metrics, such as the midterm examination and the total final examination score, did not differ between groups. The results indicate that post-lecture arousal selectively increased the later retrieval of lecture material, despite the availability of the material for study before and after the manipulation. The results reinforce the role of post-learning arousal on memory consolidation processes, expanding the literature to include a real-world learning context.

Acute Stress Influences Neural Circuits of Reward Processing

Anthony J. Porcelli et al. — Fri, 18 Jan 2013 11:31:04 PST

People often make decisions under aversive conditions such as acute stress. Yet, less is known about the process in which acute stress can influence decision-making. A growing body of research has established that reward-related information associated with the outcomes of decisions exerts a powerful influence over the choices people make and that an extensive network of brain regions, prominently featuring the striatum, is involved in the processing of this reward-related information. Thus, an important step in research on the nature of acute stress’ influence over decision-making is to examine how it may modulate responses to rewards and punishments within reward processing neural circuitry. In the current experiment, we employed a simple reward processing paradigm – where participants received monetary rewards and punishments – known to evoke robust striatal responses. Immediately prior to performing each of two task runs, participants were exposed to acute stress (i.e., cold pressor) or a no stress control procedure in a betweensubjects fashion. No stress group participants exhibited a pattern of activity within the dorsal striatum and orbitofrontal cortex (OFC) consistent with past research on outcome processing – specifically, differential responses for monetary rewards over punishments. In contrast, acute stress group participants’ dorsal striatumand OFC demonstrated decreased sensitivity to monetary outcomes and a lack of differential activity. These findings provide insight into how neural circuits may process rewards and punishments associated with simple decisions under acutely stressful conditions.

Individual Differences in Delay Discounting Under Acute Stress: The Role of Trait Perceived Stress

Karolina M. Lempert et al. — Fri, 18 Jan 2013 11:08:37 PST

Delay discounting refers to the reduction of the value of a future reward as the delay to that reward increases. The rate at which individuals discount future rewards varies as a function of both individual and contextual differences, and high delay discounting rates have been linked with problematic behaviors, including drug abuse and gambling. The current study investigated the effects of acute anticipatory stress on delay discounting, while considering two important factors: individual perceptions of stress and whether the stressful situation is future-focused or present-focused. Half of the participants experienced acute stress by anticipating giving a videotaped speech. This stress was either future-oriented (speech about future job) or present-oriented (speech about physical appearance). They then performed a delay discounting task, in which they chose between smaller, immediate rewards, and larger, delayed rewards.Their scores on the Perceived Stress Scale were also collected. The way in which one appraises stressful situations interacts with acute stress to influence choices; under stressful conditions, delay discounting rate was highest in individuals with low trait perceived stress and lowest for individuals with high trait perceived stress. This result might be related to individual variation in reward responsiveness under stress. Furthermore, the time orientation of the task interacted with its stressfulness to affect the individual’s propensity to choose immediate rewards. These findings add to our understanding of the intermediary factors between stress and decision-making.

Interactive Gaming Reduces Experimental Pain With or Without a Head Mounted Display

Nakia Gordon et al. — Mon, 24 Sep 2012 08:19:08 PDT

While virtual reality environments have been shown to reduce pain, the precise mechanism that produces the pain attenuating effect has not been established. It has been suggested that it may be the ability to command attentional resources with the use of head mounted displays (HMDs) or the interactivity of the environment. Two experiments compared participants’ pain ratings to high and low levels of electrical stimulation while engaging in interactive gaming with an HMD. In the first, gaming with the HMD was compared to a positive emotion induction condition; and in the second experiment the HMD was compared to a condition in which the game was projected onto a wall. Interactive gaming significantly reduced numerical ratings of painful stimuli when compared to the baseline and affect condition. However, when the two gaming conditions were directly compared, they equally reduced participants’ pain ratings. These data are consistent with past research showing that interactive gaming can attenuate experimentally induced pain and its effects are comparable whether presented in a head mounted display or projected on a wall.

Children’s Perceptions of Intimate Partner Violence: Causes, Consequences, and Coping

Renee L. DeBoard-Lucas et al. — Wed, 05 Sep 2012 11:22:18 PDT

Children’s appraisals of conflictual and aggressive parental interactions mediate their effect on children’s adjustment. Previous studies have relied almost exclusively on selfreport questionnaires to assess appraisals; consequently we know little about perceptions that occur naturallywhen children witness interparental aggression. This study employed a semistructured interview to assess the thoughts and feelings of 34 children (ages 7–12) whose mothers were receiving services at domestic violence agencies, and mothers reported on interparental aggression that took place in the home. Children’s thoughts centered on consequences and efforts to understand why fights occurred. They generally viewed their mother’s partner as responsible for violence, though a significant number viewed both parents as playing a role. Sadness and anger were more common than anxiety, and children often attempted to stop or withdraw from fights or both. When asked why family violence occurs, most focused on perpetrators’ lack of control of anger or personal characteristics, but approximately onethird viewed victims as provoking aggression. These findings support the idea that children actively attempt to understand the causes and consequences of interparental violence and suggest that their perceptions and interpretations are important for understanding the development of beliefs regarding the use of violence in close relationships.

Capturing the Family Context of Emotion Regulation: A Family Systems Model Comparison Approach

Gregory M. Fosco et al. — Wed, 05 Sep 2012 07:49:05 PDT

Several dimensions of family functioning are recognized as formative influences on children’s emotion regulation. Historically, they have been studied separately, limiting our ability to understand how they function within the family system. The present investigation tested models including family emotional climate, interparental conflict, and maternal and paternal warmth and emotional support in relation to children’s emotion regulation, using a multimethod, multi-informant design with 150 ethnically diverse two-parent families. Mother, father, and child surveys and observational techniques were used to assess the variables of interest. Three theoretically informed comprehensive models were tested and compared. The best fitting model highlighted positive family climate and maternal warmth and sensitivity as unique predictors. Interparental conflict was indirectly linked with children’s emotion regulation through both processes. This study underscores the value of evaluating family-wide, interparental, and parenting dimensions within a broader family systems model to gain a more complete understanding of children’s regulation.

Toward a More Comprehensive Understanding of Interpersonal Violence: Introduction to the Special Issue on Interconnections among Different Types of Violence

Suzanne Swan et al. — Tue, 04 Sep 2012 08:21:27 PDT

Recent epidemiological work shows that most victims of interpersonal violence have experienced other forms of violence as well. Similarly, perpetrators of one type of violence often engage in aggression in other contexts, and many people report both perpetration and victimization. This special issue presents 8 studies on the leading edge of research investigating the interconnections among different forms of violence, abuse, and maltreatment. They examine links between sexual and physical abuse, intimate partner violence, teen dating violence, community violence, and violent media. Together, they suggest that focusing on the co-occurrence of different types of violence has the potential to advance our understanding of the causes and consequences of violence and to develop more effective approaches to prevention and intervention.

Youth Experiences of Family Violence and Teen Dating Violence Perpetration: Cognitive and Emotional Mediators

John Grych et al. — Tue, 04 Sep 2012 08:15:37 PDT

The Decline in World Wide Oceanic Fishing Harvests: Lotka-Volterra and Related Dynamics

Stephen Guastello — Wed, 25 Jul 2012 10:44:23 PDT

Nonlinear Dynamical Systems Applications to Psychology and Management

Stephen Guastello — Fri, 20 Jul 2012 11:38:12 PDT

Does the Chaos Exercise Produce Chaotic Behavior?

Stephen J. Guastello — Thu, 14 Jun 2012 13:43:19 PDT

The Search for a Natural Rate of Price Inflation: US 1948-1995

Stephen J. Guastello — Thu, 14 Jun 2012 12:28:35 PDT

Understanding Neuromotor Strategy During Functional Upper Extremity Tasks Using Symbolic Dynamics

Dominic Nathan et al. — Wed, 16 May 2012 13:13:59 PDT

The ability to model and quantify brain activation patterns that pertain to natural neuromotor strategy of the upper extremities during functional task performance is critical to the development of therapeutic interventions such as neuroprosthetic devices. The mechanisms of information flow, activation sequence and patterns, and the interaction between anatomical regions of the brain that are specific to movement planning, intention and execution of voluntary upper extremity motor tasks were investigated here. This paper presents a novel method using symbolic dynamics (orbital decomposition) and nonlinear dynamic tools of entropy, self-organization and chaos to describe the underlying structure of activation shifts in regions of the brain that are involved with the cognitive aspects of functional upper extremity task performance. Several questions were addressed: (a) How is it possible to distinguish deterministic or causal patterns of activity in brain fMRI from those that are really random or non-contributory to the neuromotor control process? (b) Can the complexity of activation patterns over time be quantified? (c) What are the optimal ways of organizing fMRI data to preserve patterns of activation, activation levels, and extract meaningful temporal patterns as they evolve over time? Analysis was performed using data from a custom developed time resolved fMRI paradigm involving human subjects (N=18) who performed functional upper extremity motor tasks with varying time delays between the onset of intention and onset of actual movements. The results indicate that there is structure in the data that can be quantified through entropy and dimensional complexity metrics and statistical inference, and furthermore, orbital decomposition is sensitive in capturing the transition of states that correlate with the cognitive aspects of functional task performance.

Discrimination, Acculturation, Acculturative Stress, and Latino Psychological Distress: A Moderated-Mediational Model

Lucas Torres et al. — Wed, 16 May 2012 12:58:57 PDT

Prior research has found that perceived discrimination is associated with adverse mental health outcomes among Latinos. However, the process by which this relationship occurs remains an understudied area. The present study investigated the role of acculturative stress in underlying the relationship between perceived discrimination and Latino psychological distress. Also examined was the ability of acculturation to serve as a moderator between perceived discrimination and acculturative stress. Among a sample of Latino adults (N = 669), moderated mediational analyses revealed that acculturative stress mediated the perceived discrimination-psychological distress relationship, and that the link between perceived discrimination and acculturative stress was moderated by Anglo behavioral orientation but not Latino behavioral orientation. The findings are discussed within a stress and coping perspective that identifies the psychological consequences associated with perceived discrimination and acculturative stress.

Peer Rejection and Friendships in Children with Attention-Deficit/Hyperactivity Disorder: Contributions to Long-Term Outcomes

Sylvie Mrug et al. — Tue, 15 May 2012 09:29:09 PDT

Even after evidence-based treatment, Attention- Deficit/Hyperactivity Disorder (ADHD) is associated with poor long-term outcomes. These outcomes may be partly explained by difficulties in peer functioning, which are common among children with ADHD and which do not respond optimally to standard ADHD treatments. We examined whether peer rejection and lack of dyadic friendships experienced by children with ADHD after treatment contribute to long-term emotional and behavioral problems and global impairment, and whether having a reciprocal friend buffers the negative effects of peer rejection. Children with Combined type ADHD (N0300) enrolled in the Multimodal Treatment Study of Children with ADHD (MTA) were followed for 8 years. Peer rejection and dyadic friendships were measured with sociometric assessments after the active treatment period (14 or 24 months after baseline; M ages 9.7 and 10.5 years, respectively). Outcomes included delinquency, depression, anxiety, substance use, and general impairment at 6 and 8 years after baseline (Mean ages 14.9 and 16.8 years, respectively). With inclusion of key covariates, including demographics, symptoms ofADHD, ODD, and CD, and level of the outcome variable at 24 months, peer rejection predicted cigarette smoking, delinquency, anxiety, and global impairment at 6 years and global impairment at 8 years after baseline. Having a reciprocal friend was not, however, uniquely predictive of any outcomes and did not reduce the negative effects of peer rejection. Evaluating and addressing peer rejection in treatment planning may be necessary to improve long-term outcomes in children with ADHD.

Individual Differences Associated with the Repeated Endorsement of Post-Event Misinformation

Timothy J. Arentsen et al. — Thu, 26 Apr 2012 07:32:22 PDT

Orbital Decomposition: Identification of Dynamical Patterns in Categorical Data

Stephen Guastello — Tue, 20 Mar 2012 09:43:15 PDT