Matching Items (18)
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- All Subjects: psychology
- Genre: Masters Thesis
- Creators: Brewer, Gene
- Creators: Salerno, Jessica M
Description
Courthouse dogs (sometimes referred to as facility animals) are expertly trained canines which may be used to assist individuals with psychological, emotional, or physical difficulties in a myriad of courtroom situations. While these animals are increasingly used to assist young witness to court, the jury is still out on whether or not they are prejudicial to the defendant. No known research exists in this area, although research is necessary to determine the possibly prejudicial nature of these animals. Using a mock trial paradigm involving a child sexual abuse case, the current study employed a 2 (Witness type: victim vs. bystander) x 3 (Innovation type: courthouse dog vs. teddy bear vs. none) fully-crossed factorial design. It was hypothesized that witness type and innovation type would interact to differentially impact jurors' judgments about the trial, defendant, and child witness. In addition, it was posited that emotions, such as anger and disgust, would also affect judgments and decision-making. Results indicate that courthouse dogs and comfort toys did impact jurors' decision making in some ways. In addition, emotions and witness credibility predicted sentencing, verdict, and other trial judgments.
ContributorsBurd, Kayla (Author) / Mcquiston, Dawn E (Thesis advisor) / Salerno, Jessica M (Committee member) / Schweitzer, Nicholas J (Committee member) / Arizona State University (Publisher)
Created2013
Description
Incidental learning of sequential information occurs in visual, auditory and tactile domains. It occurs throughout our lifetime and even in nonhuman species. It is likely to be one of the most important foundations for the development of normal learning. To date, there is no agreement as to how incidental learning occurs. The goal of the present set of experiments is to determine if visual sequential information is learned in terms of abstract rules or stimulus-specific details. Two experiments test the extent to which interaction with the stimuli can influence the information that is encoded by the learner. The results of both experiments support the claim that stimulus and domain specific details directly shape what is learned, through a process of tuning the neuromuscular systems involved in the interaction between the learner and the materials.
ContributorsMarsh, Elizabeth R (Author) / Glenberg, Arthur M. (Thesis advisor) / Amazeen, Eric (Committee member) / Brewer, Gene (Committee member) / Arizona State University (Publisher)
Created2013
Description
Protectors who do harm are often punished more severely because their crime is perceived as a betrayal of trust. Two experiments test whether this will generalize to protectors who incur harm while serving in their protective role, and if not, whether collective guilt for the harm they suffered provides an explanation. Study 1 tested competing hypotheses that a veteran (versus civilian) with PTSD would be punished either more harshly because of the trust betrayal, or more leniently because of increased guilt about the harm the veteran suffered during war. Men and women were both more lenient toward a veteran (versus civilian) but this effect was mediated by collective guilt only among men. In Study 2, guilt inductions increased leniency among participants less likely to classify the veteran as an in-group member (women, low national identifiers), but not in those who are more likely to classify the veteran as an in-group member (men, high national identifiers), who were lenient without any guilt inductions.
ContributorsJay, Alexander Charles (Author) / Salerno, Jessica M (Thesis advisor) / Schweitzer, Nicholas (Committee member) / Hall, Deborah (Committee member) / Arizona State University (Publisher)
Created2015
Description
Theories of interval timing have largely focused on accounting for the aggregate properties of behavior engendered by periodic reinforcement, such as sigmoidal psychophysical functions and their scalar property. Many theories of timing also stipulate that timing and motivation are inseparable processes. Such a claim is challenged by fluctuations in and out of states of schedule control, making it unclear whether motivation directly affects states related to timing. The present paper seeks to advance our understanding of timing performance by analyzing and comparing the distribution of latencies and inter-response times (IRTs) of rats in two fixed-interval (FI) schedules of food reinforcement (FI 30-s and FI 90-s), and in two levels of food deprivation. Computational modeling revealed that each component was well described by mixture probability distributions embodying two-state Markov chains. Analysis of these models revealed that only a subset of latencies are sensitive to the periodicity of reinforcement, and pre-feeding only reduces the size of this subset. The distribution of IRTs suggests that behavior in FI schedules is organized in bouts that lengthen and ramp up in frequency with proximity to reinforcement. Pre-feeding slowed down the lengthening of bouts and increased the time between bouts. When concatenated, these models adequately reproduced sigmoidal FI response functions. These findings suggest that behavior in FI fluctuates in and out of schedule control; an account of such fluctuation suggests that timing and motivation are dissociable components of FI performance. These mixture-distribution models also provide novel insights on the motivational, associative, and timing processes expressed in FI performance, which need to be accounted for by causal theories of interval timing.
ContributorsDaniels, Carter W (Author) / Sanabria, Federico (Thesis advisor) / Brewer, Gene (Committee member) / Wynne, Clive (Committee member) / Arizona State University (Publisher)
Created2015
Description
The human body is a complex system comprised of many parts that can coordinate in a variety of ways to produce controlled action. This creates a challenge for researchers and clinicians in the treatment of variability in motor control. The current study aims at testing the utility of a nonlinear analysis measure – the Largest Lyapunov exponent (1) – in a whole body movement. Experiment 1 examined this measure, in comparison to traditional linear measure (standard deviation), by having participants perform a sit-to-stand (STS) task on platforms that were either stable or unstable. Results supported the notion that the Lyapunov measure characterized controlled/stable movement across the body more accurately than the traditional standard deviation (SD) measure. Experiment 2 tested this analysis further by presenting participants with an auditory perturbation during performance of the same STS task. Results showed that both the Lyapunov and SD measures failed to detect the perturbation. However, the auditory perturbation may not have been an appropriate perturbation. Limitations of Experiment 2 are discussed, as well as directions for future study.
ContributorsGibbons, Cameron T (Author) / Amazeen, Polemnia G (Thesis advisor) / Amazeen, Eric (Committee member) / Brewer, Gene (Committee member) / Arizona State University (Publisher)
Created2016
Description
Self-control has been shown to predict both health risk and health protective outcomes. Although top-down or “good” self-control is typically examined as a unidimensional construct, research on “poor” self-control suggests that multiple dimensions may be necessary to capture aspects of self-control. The current study sought to create a new brief survey measure of top-down self-control that differentiates between self-control capacity, internal motivation, and external motivation. Items were adapted from the Brief Self-Control Scale (BSCS; Tangney, Baumeister, & Boone, 2004) and were administered through two online surveys to 347 undergraduate students enrolled in introductory psychology courses at Arizona State University. The Self-Control Motivation and Capacity Survey (SCMCS) showed strong evidence of validity and reliability. Exploratory and confirmatory factor analyses supported a 3-factor structure of the scale consistent with the underlying theoretical model. The final 15-item measure demonstrated excellent model fit, chi-square = 89.722 p=.077, CFI = .989, RMSEA = .032, SRMR = .045. Despite several limitations including the cross-sectional nature of most analyses, self-control capacity, internal motivation, and external motivation uniquely related to various self-reported behavioral outcomes, and accounted for additional variance beyond that accounted for by the BSCS. Future studies are needed to establish the stability of multiple dimensions of self-control, and to develop state-like and domain-specific measures of self-control. While more research in this area is needed, the current study demonstrates the importance of studying multiple aspects of top-down self-control, and may ultimately facilitate the tailoring of interventions to the needs of individuals based on unique profiles of self-control capacity and motivation.
ContributorsPapova, Anna (Author) / Corbin, William R. (Thesis advisor) / Karoly, Paul (Committee member) / Brewer, Gene (Committee member) / Arizona State University (Publisher)
Created2016
Differential perceptions of LGBT individuals: the intersectionality of sexual orientation and gender
Description
Current research on anti-gay attitudes has focused heavily on heterosexuals versus
non-heterosexuals, with very little research delving into the differences within these “non-heterosexual” groups. The author conducted an exploratory analysis of how the intersectional effect of gender and sexual orientation affect perceptions of target groups’ gender and sexuality, which in turn might explain different levels of prejudice toward LGBT subgroups. Based on previous studies, the author hypothesized that participants would believe that a gay male has a more fixed sexuality than a lesbian, leading in turn to higher levels of moral outrage. This study further aims to extend the literature to perceptions of bisexual and transgender individuals by testing competing hypotheses. Participants might feel less moral outrage toward these groups than other LGBT subgroups because they believe their sexuality is even less fixed than lesbians’. Alternatively, participants might feel more moral outrage toward bisexual and transgender targets (versus other LGBT groups) because of the uncomfortable feeling of uncertainty about these groups’ sexuality and/or gender. Overall, participants demonstrated an interactive effect of gender and sexuality on factors including perceived sexual orientation, perceived biological sex, perceived gender identity, perceived sexual fixedness, and moral outrage rather than gender having a main effect on perceptions of gender and sexual orientation having a main effect on perceptions of sexuality. Furthermore, perceptions of sexual fixedness mediated the effect of gender on moral outrage for heterosexual target groups, but not gay targets. Gender certainty mediated the effect of gender on moral outrage for pre-op transgender target groups, but not heterosexuals. This work is important to inform future research on the topics of the intersection of sexuality and gender, especially to extend the limited literature on perceptions of bisexual and transgender individuals.
non-heterosexuals, with very little research delving into the differences within these “non-heterosexual” groups. The author conducted an exploratory analysis of how the intersectional effect of gender and sexual orientation affect perceptions of target groups’ gender and sexuality, which in turn might explain different levels of prejudice toward LGBT subgroups. Based on previous studies, the author hypothesized that participants would believe that a gay male has a more fixed sexuality than a lesbian, leading in turn to higher levels of moral outrage. This study further aims to extend the literature to perceptions of bisexual and transgender individuals by testing competing hypotheses. Participants might feel less moral outrage toward these groups than other LGBT subgroups because they believe their sexuality is even less fixed than lesbians’. Alternatively, participants might feel more moral outrage toward bisexual and transgender targets (versus other LGBT groups) because of the uncomfortable feeling of uncertainty about these groups’ sexuality and/or gender. Overall, participants demonstrated an interactive effect of gender and sexuality on factors including perceived sexual orientation, perceived biological sex, perceived gender identity, perceived sexual fixedness, and moral outrage rather than gender having a main effect on perceptions of gender and sexual orientation having a main effect on perceptions of sexuality. Furthermore, perceptions of sexual fixedness mediated the effect of gender on moral outrage for heterosexual target groups, but not gay targets. Gender certainty mediated the effect of gender on moral outrage for pre-op transgender target groups, but not heterosexuals. This work is important to inform future research on the topics of the intersection of sexuality and gender, especially to extend the limited literature on perceptions of bisexual and transgender individuals.
ContributorsMalik, Sarah Elizabeth (Author) / Salerno, Jessica M (Thesis advisor) / Schweitzer, Nicholas (Committee member) / Hall, Deborah (Committee member) / Arizona State University (Publisher)
Created2016
Description
Behavioral, electrophysiological, and neuroimaging evidence has demonstrated that multiple object tracking (MOT) tasks draw upon visual perception, attention, and working memory cognitive processes. Functional neuroimaging studies identified the middle temporal visual area (MT+/V5) as one of several brain regions associated with MOT in humans. MT+/V5 is thought to be responsible for processing motion from visual information, regulating smooth pursuit eye movements, and encoding memory for motion. However, it is unclear how MT+/V5 interacts with attention and working memory performance processes during MOT. To investigate this question, the right MT+/V5 region was identified in 14 neurotypical subjects using structural magnetic resonance imaging (sMRI). The right MT+/V5 was stimulated using intermittent theta-burst stimulation (iTBS), continuous theta-burst stimulation (cTBS), and sham transcranial magnetic stimulation (TMS) using a within-subjects design. Average MOT performance was measured before and 5-min, 30-min, and 60-min after each stimulation protocol. There was no significant difference in average MOT performance across time, regardless of the stimulation condition.
ContributorsAlucard, Myles (Author) / Duran, Nicholas (Thesis advisor, Committee member) / Brewer, Gene (Thesis advisor, Committee member) / Burleson, Mary (Committee member) / Arizona State University (Publisher)
Created2023
Description
The legal system relies heavily on the contribution of forensic psychologists. These psychologists give opinions on a defendant’s ability to stand trial, their legal sanity at the time of the crime, their future dangerousness, and their competency to be executed. However, we know little about what extrinsic factors bias these experts. I assessed the influence of gruesome photographs on forensic psychologists’ evaluations of competency and legal sanity. Previous research has demonstrated that these photographs influence lay judgments of guilt. I predicted that gruesome color photographs (versus the same photographs in black-and-white or a textual description of the photographs) would influence forensic psychologists to judge the defendant competent and sane (decisions that might ultimately lead to punishment). I also predicted that this effect would be greater for sanity judgments than for competency judgments. I asked laypeople to make the same decisions in order to compare expert and lay judgments. I predicted that impact of photograph type seen in experts would be greater in the lay sample. No differences in judgments of competence, sanity, or mental illness emerged as a function of the type of visual information, for either expert or lay participants. Experts relied on competency evidence to make competency judgments and insanity evidence to make insanity judgments. In contrast, lay people relied on various types of evidence to make their ultimate judgments. This research suggests that people making competency and sanity judgments might not be biased by gruesome photographs.
ContributorsPhalen, Hannah (Author) / Salerno, Jessica M (Thesis advisor) / Saks, Michael J. (Committee member) / Schweitzer, Nicholas J (Committee member) / Arizona State University (Publisher)
Created2018
Description
In a trial, jurors are asked to set aside their emotions and make judgments based solely on evidence. Research suggests jurors are not always capable of this, particularly when exposed to gruesome photographic evidence. However, previous research has not looked at the potentially moderating effect of when and for how long jurors are exposed to emotionally disturbing photographs, nor how many photographs they see. In two experiments I tested the impact of the timing of and extent of exposure to gruesome photographs on jurors’ emotions, verdicts, and punishment recommendations. In Study 1, I investigated the effect of timing and exposure duration to a single gruesome photograph of a victim in a murder case (no exposure, brief early exposure, brief late exposure, and prolonged exposure) on mock jurors’ emotions and case judgments. Prolonged exposure (relative to no or brief exposure, regardless of timing) increased disgust, which in turn was associated with harsher punishment. Contrary to previous research, the photograph manipulation did not influence verdicts. The results were mixed and inconclusive regarding brief early versus late exposure. In Study 2, I compared repeatedly viewing a single gruesome photograph to viewing a set of four similar, but unique gruesome photographs—holding the exposure time constant—to assess the impact of quantity of photos on jurors’ emotions and case judgments. Viewing multiple gruesome photos (relative to no photos) led to increase in guilty verdicts through increased disgust, replicating previous research. Viewing a single gruesome photo (relative to no photo) led to increase in guilty verdicts through disgust, differing from Study 1 findings. Viewing multiple gruesome photos and a single gruesome photo led to more disgust, compared to viewing no photo. However, differing from Study 1, gruesome photographs did not lead to an increase in punishment recommendations. There were no significant differences between exposure to a single or multiple gruesome photos on disgust, verdicts, or punishments. Overall, greater exposure to gruesome evidence led to increased disgust and punitiveness, relative to those with less exposure. However, jurors with greater exposure to the same or different photographs did not differ in reported emotions, verdicts, or punitiveness.
ContributorsBean, Samantha Rae (Author) / Salerno, Jessica M (Thesis advisor) / Schweitzer, Nicholas (Committee member) / Duran, Nicholas (Committee member) / Arizona State University (Publisher)
Created2020