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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
81

The psycho-educational use of mental toughness in dealing with trauma

Van Niekerk, Anna Maria Susanna 10 1900 (has links)
The purpose of this study was to investigate whether a psycho-educational intervention program could support traumatised people to increase their mental toughness. Mental toughness is a well proven phenomenon in sports psychology as well as in leadership in the corporate world. I wanted to apply the use of mental toughness in trauma. Literature was consulted to understand the phenomena of mental toughness and trauma respectively. The corresponding aspects of mental toughness and trauma were selected for the literature review and many similarities between mental toughness and trauma were discovered. The corresponding aspects included action taking, the importance of the “self”, facing negativity and adversity, the importance of support systems, flexibility and adjustment, dealing with guilt and self-blame, the role of self-talk, people’s perceptions, goal-setting, commitment, helplessness / learned helplessness and dealing with stress. I used the corresponding aspects to compile a psycho-educational intervention programme to support traumatised persons to develop increased mental toughness that will support them to better deal with trauma. A valid and reliable psychometric instrument, the MTQ48 (Mental Toughness Questionnaire 48), has been successfully used to determine people’s mental toughness in sports psychology and in corporate management, but has never been tested before in supporting traumatised people. An action research design was employed, where both qualitative as well as quantitative methods were used. This is also known as a mixed research design. Eight traumatised people took part in the research which was presented weekly, as individual sessions, over eight weeks. Data collection methods included questionnaires, observation and individual therapy. The results of the study indicated that seven of the eight participants’ overall mental toughness increased after the intervention program, and four of the eight participants’ mental toughness components increased. As an additional benefit, all respondents indicated that they could better deal and cope with their trauma after the intervention program. The conclusion could be drawn that the psycho-educational intervention program was successful in supporting the traumatised participants to increase their mental toughness. / Psychology of Education / D. Ed. (Psychology of Education)
82

Effects of Prazosin Treatment on Ethanol- and Sucrose-Seeking and Intake in P Rats

Verplaetse, Terril Lee 20 September 2012 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Background: Previous studies show that prazosin, an α1-adrenergic receptor antagonist, decreases alcohol drinking in animal models of alcohol use and dependence and in alcohol-dependent men. These studies extended previous findings by using a paradigm that allows for separate assessment of prazosin on motivation to seek versus consume ethanol or sucrose in selectively bred rats given acute or chronic prazosin treatment. Methods: Alcohol-preferring P rats were trained to complete an operant response that resulted in access to either 2% (Exp. 1) or 1% (Exp.2) sucrose or 10% ethanol. In Experiment 1, a 4-week consummatory testing phase consisted of rats bar-pressing to “pay” a specified amount up front to gain access to unlimited ethanol (or sucrose) for a 20-minute period. A 4-week appetitive testing phase examined how much the rats would bar-press for ethanol in an extinction session when no reinforcer could be obtained. In Experiment 2, during testing, the response requirement was dropped to a 1 and daily session cycles of drug (3 weeks/ 14 sessions from Tues to Fri) or vehicle (2 weeks/ 9 sessions from Tues to Fri) treatment were alternated per drug dose for a total of 3 drug doses (3 cycles) per rat. After each drug cycle, a single non-reinforced extinction session was conducted with no drug ‘on board’ and no reinforcer access. On test days, rats were given IP injections of either vehicle or one of three doses of prazosin (Exp 1: 0.5, 1.0, 1.5 mg/kg; Exp 2: 0.25, 0.5, 1.0 mg/kg; balanced design; -30 min). Results: In Experiment 1, prazosin significantly decreased ethanol-seeking at all doses tested. The highest dose decreased ethanol intake and increased the latency to first lever-press and first lick. Sucrose-seeking and intake were decreased by the same doses of prazosin. In Experiment 2, prazosin significantly decreased reinforcer-seeking at the lowest and highest doses while ethanol intake was not decreased by prazosin. Conversely, sucrose-seeking was decreased at the highest dose of prazosin tested while sucrose consumption was decreased by all doses. Latency to lever-press for sucrose was increased by the lowest dose of prazosin compared to vehicle. Conclusions: These findings extend previous research and indicate that prazosin decreases motivation to seek ethanol and sucrose. The specificity of prazosin on different behaviors and over different reinforcers suggests that these findings are not due to prazosin-induced motor-impairment or malaise. These data suggest that prazosin may work by decreasing the reinforcing properties of reinforcers in general.
83

Achieving pharmacologically relevant IV alcohol self-administration in the rat

Windisch, Kyle Allyson 27 September 2012 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Alcohol consumption produces a complex array of effects that can be divided into two types: the explicit pharmacological effects of ethanol (which can be quite separate temporally from time of intake) and the more temporally “relevant” effects (primarily olfactory and taste) that bridge the time from intake to the onset of the pharmacological effects. Dissociating these effects is essential to untangling the neurologic underpinnings of alcohol abuse and dependence. Intravenous self-administration of ethanol allows for controlled and precise dosing, bypasses first order absorption kinetics allowing for a faster onset of pharmacologic effects, and eliminates the confounding “non-pharmacological” effects associated with oral consumption. Intravenous self-administration of ethanol has been reliably demonstrated in both mouse and human experimental models; however, consistent intravenous self-administration of pharmacologically relevant levels of ethanol remains elusive in the rat. Previous work has demonstrated reliable elevated intravenous ethanol self administration using a compound reinforcer of oral sucrose and intravenous ethanol. The present study sought to elucidate the role of each component of this reinforcer complex using a multiple schedule study design. Male P rats had free access to both food and water during all intravenous self-administration sessions and all testing was performed in conjunction with the onset of the dark cycle. Once animals achieved stable operant responding on both levers for an orally delivered 1% sucrose solution (1S) on a FR4 schedule, surgery was conducted to implant an indwelling jugular catheter. Animals were habituated to the attachment of infusion apparatus and received twice daily sessions for four days to condition each lever to its associated schedule. Animals were then trained to respond on a multiple FR4-FR4 schedule composed of alternating 2.5 minute components. During one component only oral 1S was presented, while in the second component a compound reinforcer of oral 1S + IV 20% ethanol was presented (25 mg/kg/injection). Both levers were extended into the chamber during the session, with the active lever/schedule alternating as the session progressed across components. Average ethanol intake was 0.47 ± 0.04 g/kg. A significant increase in sucrose only reinforcers and sucrose lever error responding was found suggesting that sucrose not ethanol is responsible for driving overall responding. The current findings suggest that the existing intravenous ethanol self-administration methodology remains aversive in the rat.

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