Global ETD Search

1	The effect of shock intensity on discriminative escape conditioning / Discriminative escape conditioning Annau, Zoltan 10 1900 (has links) This thesis was concerned with the effects of shock intensity on discriminative escape conditioning. At the lowest shock intensity there was a bimodal distribution of nonresponding animals at one mode and responders at the other mode. Optimum performance occurred at the lowest shock intensity at which 100% of the animals responded. At higher shock intensities performance deteriorated. An attempt to test the Yerkes-Dodson Law failed to yield conclusive results. Finally, it was found that shock intensity affected performance rather than learning. / Thesis / Doctor of Philosophy (PhD) shock discriminative escape conditioning Yerkes-Dodson Law
2	Dynamika změn aktivační úrovně jako komponenta motorické docility / Dynamic changes of arousal as component of motor docility Benešová, Daniela January 2011 (has links) Title: The dynamic of changes of the arousal level like the component of motory docility. Objectives: The aim of this disertation work is to detect if there has been the relationship between the dynamic of changes of the arousal and the effectiveness of sensomotory learning (motory docility). Along with the next complementary examinations we would like to formulate proposals how to diagnose the motory docility. Thete is derivate from the subject"s ability to control its psychophysiology processes during the executing of unknown coordination task. Methods: The arousal of subject was objectificate throuth test of bimanual coordination, test of "mirror drawing" and expert testimony of motory docility. Results: It was detect, that the changes of arousal influence the running and quality of the sensomotory learning. Obtained data are corresponding with the expert testimory of motory docility. Keywords: electrodermal activity, coordination ability, sensomotory learning
3	Stress of Trying Daily Therapy Interventions Hansen, Emily Kathryn 01 November 2018 (has links) This study is focused on clients' daily experiencing of stress, and measures how this stress might affect their implementation of ideas and recommendations from therapy. Typically, clients attend therapy with the intention of making positive changes. Part of the therapeutic process involves clients completing therapeutic work in their daily lives (Conklin, Strunk, Cooper, 2017); however, stressful tasks and other elements often preclude this therapeutic work from occurring (Kazantzis & L'Abate, 2005). In this study we examine which interventions from therapy are most likely to be attempted at home, and the level of stress in making these attempts. A series of multi-level models were used, controlling for daily stress and examining partner effects. This study will be viewed from the conceptual lenses of window of tolerance (Siegel, 1999) and the Yerkes-Dodson law (Hanoch, Vitouch, 2004) on stress. Yerkes Dodson curve window of tolerance therapeutic interventions
4	Dynamika změn aktivační úrovně jako komponenta motorické docility / Dynamic changes of arousal as component of motor docility Benešová, Daniela January 2011 (has links) Title: The dynamic of changes of the arousal level like the component of motory docility. Objectives: The aim of this disertation work is to detect if there has been the relationship between the dynamic of changes of the arousal and the effectiveness of sensomotory learning (motory docility). Along with the next complementary examinations we would like to formulate proposals how to diagnose the motory docility. Thete is derivate from the subject"s ability to control its psychophysiology processes during the executing of unknown coordination task. Methods: The arousal of subject was objectificate throuth test of bimanual coordination, test of "mirror drawing" and expert testimony of motory docility. Results: It was detect, that the changes of arousal influence the running and quality of the sensomotory learning. Obtained data are corresponding with the expert testimory of motory docility. Keywords: electrodermal activity, coordination ability, sensomotory learning
5	Correlating Computer User Stress and Performance in Both Preferred and Non-preferred Modalities Castles, Ricky Thomas 12 June 2006 (has links) Most computer interfaces are designed in a one-size-fits-all fashion, which does not account for individual differences in abilities and preferences. Some computer users thrive with one software application while another user may struggle to use the same software. Some people tend to perform very well amidst distraction whereas others have a difficult time concentrating on a primary task when distracting agents are present. Much work has been done in quantifying a person's performance, but it has typically been difficult to quantify how difficult a task was for a person to perform. This thesis looks into the stress exhibited by various computer users while performing tasks in both their preferred and non-preferred modalities. The paper surveys the current physiological methods for analyzing human stress and delineates the hardware and software design and implementation of some of these methods. The physiological data-collecting hardware and software were deployed to collect physiological samples from test subjects engaging in memorization and recollection tasks in both an undistracted and a distracted setting. An analysis of the data shows the correlation between preferred modality and performance of tasks in that modality and other modalities. This analysis also shows the correlation between user arousal level and performance with and without distraction. Individual differences are considered by normalizing the physiological data collected for each subject prior to comparison with other subjects. The work presented herein gives insight into the individual differences of various types of computer users and is a precursor to work in adaptive user interface technology. / Master of Science individual differences distraction physiological data processing human-computer interaction adaptive user interfaces computer user stress Yerkes-Dodson Law
6	THE EFFECTS OF NOISE ON AUTONOMIC AROUSAL AND ATTENTION AND THE RELATIONSHIP TO AUTISM SYMPTOMATOLOGY Ann Marie Alvar (11820860) 18 December 2021 (has links) <p>Experiment One: The Effect of Noise on Autonomic Arousal</p><p><br></p><p>In response to the growing demand for research that helps us understand the complex interactions between Autonomic Arousal (AA) on behavior and performance there is an increasing need for robust techniques to efficiently utilize stimuli, such as sound, to vary the level of AA within a study. The goal of this study was to look at the impact of several factors, including sound intensity, order of presentation, and direction of presentation on skin conductance level, a widely utilized technique for approximating levels of AA. To do this we had 34 young adults ages 18- 34 listen to a series of 2-minute blocks of a sound stimuli based off a heating, ventilation, and air conditioning system (HVAC). Blocks included 5 single intensity conditions each block differing in 10 dBA steps ranging from 35-75 dBA. We presented blocks in both rising and falling level of intensity, with half the participants hearing them in a rising order first and half in a falling order first. The evidence found by this study suggests that increasing the sound level plays an important role in increasing AA and habituation is an extremely important factor that must be accounted for as it, in the case of typical young adults, quickly dampens the response to stimuli and subsequent stimuli. These findings suggest that researchers can best efficiently maximize the range of AA they can use while keeping their participants comfortable by starting out with the most intense stimuli and proceeding to the less intense stimuli, working with habitation instead of against it.</p><p> </p><p><br></p><p> Experiment Two: The Effect of Autonomic Arousal on Visual Attention</p><p><br></p><p>The goal of this study was to better understand how various levels of autonomic arousal impact different components of attentional control and if ASD-related traits indexed by Autism Quotient scores (AQ) might relate to alterations in this relationship. This study had 41 young adult participants (23 women, 17 men, 1 prefer not to say), ages ranging from 18 to 38 years old. Participants listened to varying levels of noise to induce changes in AA, which were recorded as changes in skin conductance level (SCL). To evaluate attentional control, participants preformed pro and anti-saccade visual gap–overlap paradigm tasks as measures of attentional control. The findings of this study suggest that increased levels of autonomic arousal are helpful for improving performance on anti-saccade tasks, which are heavily dependent on top-down attentional control. Additionally, increases in AQ scores were related to having less of a benefit from increasing levels of arousal on anti-saccade tasks. Additional interactions were also found and are discussed in this paper.</p> Visual Attention autonomic arousal auditory stimuli Autism Quotient Autism electrodermal activity Attention saccade Anti-saccade Gap-overlap task Autism Quotient score Pro-saccade prosaccade task saccade onset times saccade reaction time EOG Disengagement Electrooculography Yerkes-Dodson law Auditory Eye movements Skin Conductance Level Psychophysiology sympathetic activity
7	Enhanching the Human-Team Awareness of a Robot Wåhlin, Peter January 2012 (has links) The use of autonomous robots in our society is increasing every day and a robot is no longer seen as a tool but as a team member. The robots are now working side by side with us and provide assistance during dangerous operations where humans otherwise are at risk. This development has in turn increased the need of robots with more human-awareness. Therefore, this master thesis aims at contributing to the enhancement of human-aware robotics. Specifically, we are investigating the possibilities of equipping autonomous robots with the capability of assessing and detecting activities in human teams. This capability could, for instance, be used in the robot's reasoning and planning components to create better plans that ultimately would result in improved human-robot teamwork performance. we propose to improve existing teamwork activity recognizers by adding intangible features, such as stress, motivation and focus, originating from human behavior models. Hidden markov models have earlier been proven very efficient for activity recognition and have therefore been utilized in this work as a method for classification of behaviors. In order for a robot to provide effective assistance to a human team it must not only consider spatio-temporal parameters for team members but also the psychological.To assess psychological parameters this master thesis suggests to use the body signals of team members. Body signals such as heart rate and skin conductance. Combined with the body signals we investigate the possibility of using System Dynamics models to interpret the current psychological states of the human team members, thus enhancing the human-awareness of a robot. / Användningen av autonoma robotar i vårt samhälle ökar varje dag och en robot ses inte längre som ett verktyg utan som en gruppmedlem. Robotarna arbetar nu sida vid sida med oss och ger oss stöd under farliga arbeten där människor annars är utsatta för risker. Denna utveckling har i sin tur ökat behovet av robotar med mer människo-medvetenhet. Därför är målet med detta examensarbete att bidra till en stärkt människo-medvetenhet hos robotar. Specifikt undersöker vi möjligheterna att utrusta autonoma robotar med förmågan att bedöma och upptäcka olika beteenden hos mänskliga lag. Denna förmåga skulle till exempel kunna användas i robotens resonemang och planering för att ta beslut och i sin tur förbättra samarbetet mellan människa och robot. Vi föreslår att förbättra befintliga aktivitetsidentifierare genom att tillföra förmågan att tolka immateriella beteenden hos människan, såsom stress, motivation och fokus. Att kunna urskilja lagaktiviteter inom ett mänskligt lag är grundläggande för en robot som ska vara till stöd för laget. Dolda markovmodeller har tidigare visat sig vara mycket effektiva för just aktivitetsidentifiering och har därför använts i detta arbete. För att en robot ska kunna ha möjlighet att ge ett effektivt stöd till ett mänskligtlag måste den inte bara ta hänsyn till rumsliga parametrar hos lagmedlemmarna utan även de psykologiska. För att tyda psykologiska parametrar hos människor förespråkar denna masteravhandling utnyttjandet av mänskliga kroppssignaler. Signaler så som hjärtfrekvens och hudkonduktans. Kombinerat med kroppenssignalerar påvisar vi möjligheten att använda systemdynamiksmodeller för att tolka immateriella beteenden, vilket i sin tur kan stärka människo-medvetenheten hos en robot. / <p>The thesis work was conducted in Stockholm, Kista at the department of Informatics and Aero System at Swedish Defence Research Agency.</p> robotics Artificial Intelligence AI System Dynamics Wireless Body Area Network WBAN sensors Psychology physiology human behavior Human-Robot-Interaction HRI robot Human-Team awareness human-robot RapidMiner Vensim JaHMM hidden markov models HMM eclipse rcp ARFF recognizer classification cross-validation human behavior stress detection Galvanic Skin Response Heart Rate Skin Temperature Finger Temperature Electrocardiogram ECG GSR ST Pupil Diameter PD Patient monitoring GPS Data acquisition dataset data set MODERE Yerkes-Dodson SD model SD Confusion matrix spatial MOUT Java Agent robotic agent Machine Learning activity recognition team oriented robot Evaluation Decoding Learning Forward Algorithm Backward Algorithm Baum-Welch feedback loop Situation Awareness SA Shared Mental Models SMM

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