Matching Items (7)
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- All Subjects: Touch
- Creators: Burleson, Mary H
- Creators: Kleim, Jeffrey
Description
Humans are capable of transferring learning for anticipatory control of dexterous object manipulation despite changes in degrees-of-freedom (DoF), i.e., switching from lifting an object with two fingers to lifting the same object with three fingers. However, the role that tactile information plays in this transfer of learning is unknown. In this study, subjects lifted an L-shaped object with two fingers (2-DoF), and then lifted the object with three fingers (3-DoF). The subjects were divided into two groups--one group performed the task wearing a glove (to reduce tactile sensibility) upon the switch to 3-DoF (glove group), while the other group did not wear the glove (control group). Compensatory moment (torque) was used as a measure to determine how well the subject could minimize the tilt of the object following the switch from 2-DoF to 3-DoF. Upon the switch to 3-DoF, subjects wearing the glove generated a compensatory moment (Mcom) that had a significantly higher error than the average of the last five trials at the end of the 3-DoF block (p = 0.012), while the control subjects did not demonstrate a significant difference in Mcom. Additional effects of the reduction in tactile sensibility were: (1) the grip force for the group of subjects wearing the glove was significantly higher in the 3-DoF trials compared to the 2-DoF trials (p = 0.014), while the grip force of the control subjects was not significantly different; (2) the difference in centers of pressure between the thumb and fingers (ΔCoP) significantly increased in the 3-DoF block for the group of subjects wearing the glove, while the ΔCoP of the control subjects was not significantly different; (3) lastly, the control subjects demonstrated a greater increase in lift force than the group of subjects wearing the glove (though results were not significant). Combined together, these results suggest different force modulation strategies are used depending on the amount of tactile feedback that is available to the subject. Therefore, reduction of tactile sensibility has important effects on subjects' ability to transfer learned manipulation across different DoF contexts.
ContributorsGaw, Nathan (Author) / Helms Tillery, Stephen (Thesis advisor) / Santello, Marco (Committee member) / Kleim, Jeffrey (Committee member) / Arizona State University (Publisher)
Created2014
Description
The present study examined daily survey data collected from married couples over the course roughly 14 days. I investigated the relationships of the morning quality ratings of three distinct spousal interactions conversation (physical affection, and sexual activity) reported in mornings on later-day positive and negative affect, as well as next-day intensity of negative somatic symptoms (e.g. headaches, dizziness, aches and pains). Hierarchical linear modeling was used to estimate path models for both husbands and wives. Direct and indirect effects were observed. Results showed that quality of conversation and physical affection increased later-day positive mood for both husbands and wives; however, positive quality activity increased later-day positive affect for wives only. Quality of sexual activity decreased later-day negative affect for wives only. Less later-day negative affect decreased next-day intensity of symptoms for both husbands and wives. Lastly, quality of sexual activity decreased later-day negative affect, which decreased next-day somatic symptoms for wives. This was the only significant indirect effect. Implications are that high marital quality is important for maintaining psychological health for both spouses, and physical health, particularly for wives.
ContributorsVincelette, Tara (Author) / Burleson, Mary H (Thesis advisor) / Roberts, Nicole A. (Committee member) / Schweitzer, Nicholas J (Committee member) / Arizona State University (Publisher)
Created2012
Description
Humans are social beings, which means interpersonal relationships are important contributors to our psychological health. Our health and behavior is manifested through a dynamic cycle of interacting factors: environmental, personal, and behavioral. Contributing to this interaction, interpersonal relationships provide benefits such as increased social support and decreased loneliness. The care and attention of relationship partners are communicated in multiple ways, one of which is interpersonal touch. Although touch can communicate positive feelings and support, it can also be used negatively in certain contexts. Unwanted or forced touch occurs when an individual experiences sexual or physical trauma. Experiencing this type of trauma often results in negative psychological consequences. Exactly how sexual or physical trauma—both of which involve unwanted touch—might influence an individual’s attitudes towards touch is important to explore. If an individual feels negatively about interpersonal touch due to previous experience of trauma, this might negatively influence the amount of current touch with a partner, and also the survivor’s psychological well-being.
In the current study, I proposed that previous occurrence of sexual or physical trauma would predict both decreased frequency of touch in a current intimate relationship and poorer individual well-being, and that these relations would be explained by negative touch attitudes. Results supported these hypotheses, suggesting that lingering negative touch attitudes following trauma could be an underlying mechanism affecting social and individual functioning. As seen in our model, these attitudes fully mediated the effects between previous sexual or physical trauma and individual well-being, as well as frequency of touch. This understanding can help provide further insight into the repercussions of trauma and the underlying mechanisms attributing to continued negative effects.
In the current study, I proposed that previous occurrence of sexual or physical trauma would predict both decreased frequency of touch in a current intimate relationship and poorer individual well-being, and that these relations would be explained by negative touch attitudes. Results supported these hypotheses, suggesting that lingering negative touch attitudes following trauma could be an underlying mechanism affecting social and individual functioning. As seen in our model, these attitudes fully mediated the effects between previous sexual or physical trauma and individual well-being, as well as frequency of touch. This understanding can help provide further insight into the repercussions of trauma and the underlying mechanisms attributing to continued negative effects.
ContributorsHurd, Julie Ann (Author) / Burleson, Mary H (Thesis advisor) / Roberts, Nicole A. (Committee member) / Miller, Paul A. (Committee member) / Arizona State University (Publisher)
Created2018
Description
This study investigated the potential influences of a marital interaction involving affectionate touch and/or positive relationship-focused conversation on physiological reactivity to a subsequent laboratory stress task, and whether depressive symptoms moderated these relations. It was hypothesized that 1) the stress task would cause cardiac sympathetic activation and cardiac parasympathetic withdrawal; and that physical affection and/or positive conversation would 2) reduce sympathetic activation as indicated by cardiac interbeat interval (IBI), cardiac pre-ejection period (PEP), and finger pulse transit time (FPTT) and 3) reduce parasympathetic withdrawal (as indicated by respiratory sinus arrhythmia; RSA) in response to stress. Further, we expected that, compared to those lower in reported depressive symptoms, those higher in depressive symptoms 4) would show blunted cardiovascular activation in response to stress across experimental conditions; and after engaging in a positive marital exchange, 5) would demonstrate a smaller interaction-related reduction in stress-related sympathetic activation; but 6) show no difference in interaction-related reduction of stress-related parasympathetic withdrawal. Participants were 183 married couples who were at least moderately happy in their marriages and in generally good health. Participants completed a measure of depression (among other questionnaires) in an online survey, then attended a 3-hour laboratory session. After measuring baseline physiology with spouses in separate rooms, couples were then randomly assigned to either touch (while sitting quietly, then hug), talk (positive conversation, but no touch), both (touch while talking, then hug), or neither (sit quietly without touching or talking). Next, participants separately performed a stress-inducing speech task about their spouses’ strengths and weaknesses. Physiological indicators were recorded throughout the stress task. While positive conversation reduced husbands’ stress-related parasympathetic withdrawal, it predicted greater stress-related activation in wives’ PEP response. Stress reactivity (as indicated by FPTT) was reduced in husbands with lower depressive symptoms when the marital exchange included only touch or only talk, whereas for husbands with more depressive symptoms, there were no effects of the marital interaction. For wives, depressive symptoms predicted blunted cardiovascular activation regardless of positive interaction condition, as illustrated by smaller stress-related reduction in FPTT responses. Furthermore, higher self-reported depressive symptoms predicted larger interaction-related decreases in stress-related IBI responses in wives who experienced spousal touch. This study builds on previous work and is the first to explore how depressive symptoms may influence the relations between affectionate touch and stress reactivity.
ContributorsDuncan, Cayla Jessica (Author) / Burleson, Mary H (Thesis advisor) / Roberts, Nicole A. (Committee member) / Mickelson, Kristin (Committee member) / Arizona State University (Publisher)
Created2018
Description
“The Moral Sense of Touch: Teaching Tactile Values in Late Medieval England” investigates the intersections of popular science and religious education in the late fourteenth and fifteenth centuries. Taking an interdisciplinary approach, the project draws together a range of textual artifacts, from scientific manuals to private prayerbooks, to reconstruct the vast network of touch supporting the late medieval moral syllabus. I argue that new scientific understandings of the five senses, and specifically the sense of touch, had a great impact on the processes, procedures, and parlances of vernacular religious instruction in late medieval England. The study is organized around a set of object lessons that realize the materiality of devotional reading practices. Over the course of investigation, I explore how the tactile values reinforcing medieval conceptions of pleasure and pain were cultivated to educate and, in effect, socialize popular reading audiences. Writing techniques and technologies—literary forms, manuscript designs, illustration programs—shaped the reception and user-experience of devotional texts. Focusing on the cultural life of the sense of touch, “The Moral Sense of Touch” provides a new context for a sense based study of historical literatures, one that recovers the centrality of touch in cognitive, aesthetic, and moral discourses.
ContributorsRussell, Arthur J. (Author) / Newhauser, Richard G (Thesis advisor) / Sturges, Robert (Committee member) / Malo, Robyn (Committee member) / Arizona State University (Publisher)
Created2016
Description
Background: When studying how humans regulate their affect, it is important to recognize that affect regulation does not occur in a vacuum. As humans are an inherently social species, affect plays a crucial evolutionary role in social behavior, and social behavior likewise assumes an important role in affect and affect regulation. Emotion researchers are increasingly interested the specific ways people help to regulate and dysregulate one another’s affect, though experimental examinations of the extant models and theory are relatively few. This thesis presents a broad theoretical framework for social affect regulation between close others, considering the role of attachment theory and its developmental foundations for social affect regulation in adulthood. Affectionate and responsive touch is considered a major mechanism of regulatory benefit between people, both developmentally and in adulthood, and is the focus of the present investigation. Method: A total sample of 231 heterosexual married couples were recruited from the community. Participants were assigned to engage in affectionate touch or sit quietly, and/or engage in positive conversation prior to a stress task. Physiological data was collected continuously across the experiment. Hypotheses: Phasic respiratory sinus arrhythmia (RSA) was used to index the degree of regulatory engagement during the stressor for those who did and did not touch. It was hypothesized that touch would reduce stress appraisal and thus the need for regulatory engagement. This effect was predicted to be greater for those more anxiously attached while increasing the need for regulatory engagement in those more avoidantly attached. Secondarily, partner effects of attachment on sympathetic activation via pre-ejection period (PEP) change were tested. It was predicted that both attachment dimensions would predict a decrease in partner PEP change in the touch condition, with avoidant attachment having the strongest effect. Results: Hierarchical linear modeling techniques were used to account for nonindependence in dyadic observations. The first set of hypotheses were not supported, while the second set were partially supported. Wives’ avoidance significantly predicted husbands’ PEP change, but in the positive direction. This effect also significantly increased in the touch condition. Theoretical considerations and limitations are discussed.
ContributorsParkhurst, David Kevin (Author) / Burleson, Mary H (Thesis advisor) / Roberts, Nicole A. (Committee member) / Mickelson, Kristin D (Committee member) / Arizona State University (Publisher)
Created2017
Description
Our ability to estimate the position of our body parts in space, a fundamentally proprioceptive process, is crucial for interacting with the environment and movement control. For proprioception to support these actions, the Central Nervous System has to rely on a stored internal representation of the body parts in space. However, relatively little is known about this internal representation of arm position. To this end, I developed a method to map proprioceptive estimates of hand location across a 2-d workspace. In this task, I moved each subject's hand to a target location while the subject's eyes were closed. After returning the hand, subjects opened their eyes to verbally report the location of where their fingertip had been. Then, I reconstructed and analyzed the spatial structure of the pattern of estimation errors. In the first couple of experiments I probed the structure and stability of the pattern of errors by manipulating the hand used and tactile feedback provided when the hand was at each target location. I found that the resulting pattern of errors was systematically stable across conditions for each subject, subject-specific, and not uniform across the workspace. These findings suggest that the observed structure of pattern of errors has been constructed through experience, which has resulted in a systematically stable internal representation of arm location. Moreover, this representation is continuously being calibrated across the workspace. In the next two experiments, I aimed to probe the calibration of this structure. To this end, I used two different perturbation paradigms: 1) a virtual reality visuomotor adaptation to induce a local perturbation, 2) and a standard prism adaptation paradigm to induce a global perturbation. I found that the magnitude of the errors significantly increased to a similar extent after each perturbation. This small effect indicates that proprioception is recalibrated to a similar extent regardless of how the perturbation is introduced, suggesting that sensory and motor changes may be two independent processes arising from the perturbation. Moreover, I propose that the internal representation of arm location might be constructed with a global solution and not capable of local changes.
ContributorsRincon Gonzalez, Liliana (Author) / Helms Tillery, Stephen I (Thesis advisor) / Buneo, Christopher A (Thesis advisor) / Santello, Marco (Committee member) / Santos, Veronica (Committee member) / Kleim, Jeffrey (Committee member) / Arizona State University (Publisher)
Created2012