<p>Our perception of time is not veridical but rather is consistently modulating by changing dynamics in our environment. Anecdotal experiences suggest that emotions can be powerful modulators of time perception; nevertheless, the mechanisms underlying emotion-induced temporal distortions remain unclear. Widely accepted pacemaker-accumulator models of time perception suggest that changes in arousal and attention have unique influences on temporal judgments and contribute to emotional distortions of time perception. However, such models conflict with current views of arousal and attention and their interaction from the perspective of affective and cognitive science. The aim of this dissertation was to more clearly examine the role of arousal and attention in driving emotion-induced temporal distortions by explicitly manipulating and measuring these constructs using well-established timing procedures within the context of affective manipulations induced via classical conditioning and drug administration. Measures of physiological arousal and subjective measures of top-down attention to emotional stimuli were assessed both within and across subjects. The findings reported here suggest that current models of time perception do not adequately explain the variability in emotion-induced temporal distortions. Instead these findings provide support for a new theoretical model of emotion-induced temporal distortions proposed in the current manuscript that emphasizes both the unique and interactive influences of arousal and attention on time perception, dependent on temporal dynamics, event relationships, and individual differences. Collectively, these findings may point to plausible neurobiological mechanisms of emotion-induced temporal distortions and have important implications for our understanding of how emotions may modulate our perceptual experiences in service of adaptively responding to biologically relevant stimuli.</p> / Dissertation

In most adult animals, stress is generally thought to be detrimental to reproductive (sexual) function. However, in humans, there is a limited body of literature that indicates some stress can potentially be beneficial for sexual function. One theory is that there is an inverted U relationship between stress and sexual function with low and high levels of stress (or anxiety) causing an impairment of sexual response, while a moderate level of stress facilitates sexual arousal. This aim of this dissertation is to identify the mechanisms through which both acute and chronic stress may facilitate or impair sexual arousal in women. In particular, I examined the role of adrenal hormones, the autonomic nervous system (ANS), and psychological factors. To test these mechanisms, I measured cortisol, dehydroepiandrosterone sulfate (DHEAS), heart rate, distraction, and misattribution of arousal during stressful and sexual laboratory situations. Two of the studies examined the effects of acute stress, and the final study focused on chronic stress. Results indicated that acute stress is beneficial for genital arousal in women, and that the sympathetic branch of the ANS is the key mechanism involved in that relationship. High levels of chronic stress were found to significantly impair genital arousal compared to average levels of chronic stress. Increased levels of cortisol and distractions contributed to this effect. DHEAS did not appear to play a role in the relationship between stress and sexual arousal, and there was no evidence for misattribution of arousal. Neither acute nor chronic stress affected women’s subjective (psychological) arousal. Acute and chronic stressors affect sexual arousal in different ways and through separate mechanisms. The findings from these studies can inform treatment approaches for women with sexual arousal difficulties. / text

Vårt syfte med denna studie var att göra en psykometrisk utvärdering av frågeformulären PSAS-C (Pre sleep arousal scale) och APSQ (Anxiety and preoccupation about sleep questionnaire). Teoretiska modeller har kommit fram till att kognitiv uppvarvning och förvrängd subjektiv perception av sömn skapar oro som kan bidra till utveckling av insomni. För att fånga upp oro vid insomni används idag två frågeformulär, PSAS-C och APSQ. Deltagare från en svensk longitudinell studie (n = 2333) ombads att svara på de två formulären. Båda skalorna visade på en god begreppsvaliditet och intern samstämmighet. Faktoranalyser, korrelationer och jämförelser av medelvärden visar att båda frågeformulären har goda psykometriska egenskaper och kan vara till stor nytta som mätinstrument för att fånga upp oro vid insomni.

Individuals with autism spectrum disorders (ASD) have documented sensory processing difficulties across the lifespan; however there is limited empirical support for the sensory-based interventions that have become ubiquitous with the population. This study was conducted to address this need and examine the effect of sensory-based interventions on skill acquisition for five elementary-age students with ASD. Proponents suggest that sensory-based interventions can be used to facilitate optimal levels of arousal so that children are available for learning. A single-case alternating treatments design was used to evaluate functional relations between the two sensory-based antecedent interventions and correct responding on expressive identification tasks. Upon visual analysis of the graphed data, functional relations were apparent for two participants. A positive relation between one sensory activity and correct responses was evident for a third student, but his rate of skill acquisition was too slow to verify a functional relation during the study. Results were undifferentiated for two students; one reached mastery criteria with both sensory-based interventions, while one made only modest improvement in expressive identification. Hierarchical linear modeling (HLM) was used to identify predictors of growth. Scrutiny of the results of the level-1 analysis revealed that there were significant differences among the participants at the start of the study (00 = 388.46, ²(4) = 45.97, p < .001) and that all of the students made significant gains during the study (10 = 2.35, t(4) = 3.43, p < .05). Using treatment as a predictor in Model 2 resulted in the finding of no significance for the sensory-based interventions in predicting growth. The two biggest level-2 predictors of student growth were age (11 = 0.055, t(2) = 6.403, p < .001) and IQ (22 = 0.21, t(2) = 13.41, p < .001). Although not clinically significant, Childhood Autism Rating Scale scores as a level-2 predictor of growth may have practical significance. Implications for mixed-modality research and applied practice are discussed.

The objective of this thesis was to determine whether evaluative body image, affective body image, and behavioural body image were predictive of women’s sexual desire, arousal and orgasm. Results are based on self-report and body composition data from 88 women (a subset of a larger data set including men) in heterosexual romantic relationships at the time of data collection. Hierarchical multiple regression indicated that poor evaluative, affective and behavioural body image were detrimental to women’s sexual functioning. Specifically, dissatisfaction with one’s body predicted decrements in desire (β = -.31, p <.05) and arousal (β = -.35, p <.01). Similarly, feeling that others evaluate one’s body negatively, predicted decrements in desire (β = .22, p <.05) and arousal (β = .35, p <.01). Feeling negatively about one’s appearance predicted decrements in arousal (β = .26, p <.05). Negative thoughts and feelings about one’s body that influence sexual behaviours (body image self-consciousness) predicted decrements in arousal (β = -.37, p <.01) and orgasm (β = -.25, p <.05). Implications for public health messages, treatment programs, sexual problem assessments and directions for future research are discussed. / Social Sciences and Humanities Research Council

Recent findings suggest that there is considerable inter-individual variability in how mood affects sexual arousal. The current research proposes that the Dual Control Model may be important to explaining this variation. Thirty-three participants (18 male and 15 female) aged 18 to 45, attended three laboratory sessions where they completed questionnaires assessing pre-existing mood and propensity for sexual excitation and inhibition, then watched a series of neutral and erotic films. Participants continuously indicated their subjective sexual arousal during each film, while genital temperature was measured using thermographic imaging. The results indicated that mood interacted with the elements of the Dual Control Model to significantly predict both genital and subjective sexual arousal. The interactions between mood and sexual excitation and inhibition tended to better predict genital arousal for female participants and subjective sexual arousal for male participants. The results suggest that Dual Control Model is an important factor in understanding how mood affects sexual arousal. / Canadian Institutes of Health Research, Canadian Male Sexual Health Council, Fonds Recherche Santé du Québec, Pfizer and the Ontario Ministry of Training, Colleges and Universities.

This quantitative study investigated the effect of client self-disclosure on the physiological arousal of the therapist and subsequent ratings of the therapeutic alliance, session smoothness, and session depth. Three therapists and 10 clients participated in a 40-minute videotaped therapy session while being attached to sensors that measured heart rate and skin conductance. The participants completed self-report questionnaires designed to assess the therapeutic alliance and session smoothness and depth immediately following the therapy session. The videotaped therapy sessions were later transcribed and coded by two independent coders for the occurrence of client self-disclosure. Correlation analyses were utilized to determine whether or not a relationship existed between client self-disclosure and the physiological arousal of the therapist. No significant relationships were found to exist between client self-disclosure and the physiological arousal of the therapist. Positive correlations were found to exist between the occurrence of client self-disclosure and the physiological arousal of the therapist as well as between the occurrence of client self-disclosure and the therapeutic alliance. The physiological arousal of the therapist was also found to be positively correlated with the strength of the therapeutic alliance.

The primary purpose of this study was to examine the relationship among levels of trait and state anxiety, self-confidence, arousal and performance of athletes throughout a competition. A secondary purpose was to examine the usefulness of a variety of instruments used to obtain levels of anxiety, self-confidence, arousal, and performance. Trait anxiety was measured by the Sport Competition Anxiety Test (SCAT) (Martens, 1990) and levels of state anxiety and selfconfidence were measured using the Competitive State Anxiety Inventory-2 (CSAI-2) (Martens, 1990). Pre-game and game arousal levels were distinguished by monitoring heart rates via heart rate monitors. Performance of each athlete was evaluated by the head coach. An overall rating or score was determined through the use of a Performance Rating Inventory which was developed specifically for this study.Thirteen members of the Ball State Field Hockey Team, ranging in ages from 18-22 years, agreed to participate in this study. Data was collected for 19 competitions from their regular season schedule. The SCAT was administered to the athletes in a non-competitive environment_ to determine trait anxiety levels. Levels of state anxiety (cognitive and somatic), self-confidence, arousal, and performance were obtained for every competition played.Pearson Product-Moment Correlation was used to determine the relationship among levels of trait and state anxiety and arousal to playing performance. Overall, there was no statistically significant relationships found among these levels. A follow-up analysis examined the data by the three most competitive and three least competitive games of the season. Group means were graphed according to pre-game and game arousal and no significant difference was shown between the two levels of competitiveness. Group means of the three subscales of the CSAI-2 (cognitive, somatic and self-confidence) were also graphed. Cognitive and somatic state anxiety levels were at its highest and self-confidence was at its lowest for the more competitive games and cognitive and somatic state anxiety were at its lowest and self-confidence was at its highest for the least competitive games. As a result of these findings, physiologically the athletes approached both types of games similarly. The difference was in the mental approach which ultimately could of been the difference in a win or a loss. / School of Physical Education

Dėmesio mirksėjimo efektas – tai plačiai žinomas reiškinys dėmesio tyrimuose. Jis atspindi dėmesingo informacijos apdorojimo ribas, kadangi greitai (10 stimulų per sekundę dažniu) toje pačioje regos lauko vietoje pateikus stimulų seką dažniausiai žmonės nepastebi ir/ arba neatsimena antrojo reikšminio stimulo. Tai įvyksta tuo atveju, kai šis pasirodo 200-500 ms intervale nuo pirmojo reikšminio stimulo pateikimo. Neseniai Martens ir kolegos (2006) nustatė, jog kai kuriems žmonėms dėmesio mirksėjimo efektas nepasireiškia, jie buvo pavadinti „nemirksinčiais“. Manoma, kad individualius skirtumus lemia nevienodai efektyvus gebėjimas iš nereikšmingos informacijos srauto išsirinkti reikšmingą. Šiame darbe siekta patikrinti, ar individuali darbinės atminties talpa, tiriamojo emocinė būsena ir tiriamojo asmenybės bruožai turi įtakos dėmesio efekto išreikštumui. Naudojant parametrizuotą dėmesio mirksėjimo efekto analizės būdą, nustatyta, kad didesnė darbinės atminties talpa sąlygoja mažesnį dėmesio mirksėjimo efektą. Šie rezultatai patvirtina nuomonę, kad dėmesio mirksėjimo efektas yra darbinės atminties talpos ribotumo pasekmė. Taip pat nustatyta, kad tiriamojo emocinio sužadinamumo būsena yra susijusi su dėmesio mirksėjimo efekto stiprumu, o asmenybės bruožai – su trukme. / The attentional blink is a well-known phenomenon in the study of attention. It reflects the impaired ability to identify the second of two targets presented in a rapid serial visual presentation (RSVP) of events if it appears between 200 and 500 ms after the first target. Recently Martens et al. (2006) reported that about 5% of the population (referred to as “non-blinkers”) shows little or no attentional blink under conditions in which most people (“blinkers”) do show. It is proposed that aforementioned differences are determined by individual differences in efficiency of ignoring irrelevant information. Thus, the aims of this master’s thesis were to investigate the impact of working memory capacity, emotional state and personality traits on attentional blink effect. Using parameterized attentional blink analysis method, based on curve fitting, the negative correlation between the size of attentional blink and working memory capacity was revealed. These findings support the idea that individual processing limitations and working memory play a key role in attentional blink. Also it was demonstrated that emotional arousal has impact on the strength of attentional blink and personality traits have effect on the span of attentional blink.

The purpose of this study was to explore the experiences of five track athletes (three men and two women, aged 18-33 yrs) during a season-long PST-Biofeedback training program designed to help them learn how to self-regulate physiologically, psychologically, and emotionally. Three key psychological skills were emphasized: focus (Janelle, 2002; Nideffer & Sagal, 2006), arousal control through biofeedback training (e.g., Bar-Eli, Dreshman, Blumenstein, & Weinstein, 2002), and debriefing (Hogg, 2002; McArdle, Martin, Lennon, & Moore, 2010). The program, which consisted of one-on-one initial and final semi-structured interviews with PST-biofeedback sessions in between, was individualized to meet each athlete’s needs and progress during the study. Results indicated that the athletes found the program helpful; they perceived an improvement in their ability to focus, debrief, and control arousal in the lab; and, to varying degrees, they transferred those skills into training and competition. The athletes also perceived an improvement in their sport performances.