Indiana University-Purdue University Indianapolis (IUPUI) / Social support is a powerful therapeutic against fear and anxiety and is utilized in many psychotherapies. The concept that a familiar or friendly presence helps a person learn to overcome anxiety has been well-known for decades, yet, the basic neural mechanisms that regulate this psychosocial learning remain unknown. A first step towards elucidating these basic mechanisms is the development of a valid preclinical animal model. However, preclinical behavioral models exploring the use of a social presence in reducing anxiety have not been fully characterized. Therefore, it was our goal to identify a useful way in which to study the mechanisms of how a social presence can induce anxiolysis (the reduction of anxiety). We accomplished this goal by characterizing and validating a preclinical model, as well as demonstrating that the model was capable of measuring deficits in rats given a mild traumatic brain injury. To this end, we identified an existing, but uncharacterized model, the social interaction-habituation model, as an effective model of social familiarity-induced anxiolysis (SoFiA), which demonstrates socially enhanced safety learning, or psychosocial learning. We find that as social familiarity develops across time, anxiolysis develops. We identified that the use of a Bright Light Challenge is a useful anxiogenic stimulus to use during SI-habituation training. The anxiolysis acquired following SI-habituation testing is partner specific, and can be blocked by an inhibition of the medical prefrontal cortex, while it can be enhanced by D-cycloserine. We found that this model identified deficits in SoFiA acquisition in rodents exposed to a mild traumatic brain injury, which, in humans, has been linked to psychosocial deficits. This work is a step in creating ways in which we can study and better understand the regulatory processes of emotions mediated by social behavior.

Private forest land in Mississippi provides a wide range of ecosystem services. This study examined nonindustrial private forest (NIPF) landowner familiarity with ecosystem services and conservation programs and quantified the proportion of forest land they were interested in managing for ecosystem services as well as determined compensation levels required for implementing forest management strategies featuring management restriction to facilitate production of multiple ecosystem services. The data collection process was based on a structured questionnaire administered to 2,025 NIPF landowners in Mississippi. Findings indicated that landowner familiarity with conservation programs was low. However, they were familiar with ecosystem services found in Mississippi. Familiarity with conservation programs was positively associated with gender, household income, possession of a forest management plan, and membership in conservation organizations. The study also determined whether landowners were interested in managing their forests for ecosystem services and the quantified proportion of forest land they would manage for such services. Findings revealed that landowners were interested in managing for multiple ecosystem services and 62% of the forest land could be available for production of such activities in the form of pine and bottomland hardwoods. The proportion of forest land that landowners were interested in managing for ecosystem services was positively associated with the percentage proportion of natural pine and bottomland hardwoods as well as personal recreation goals while negatively related to a possession of a written forest management plan. The research also used a contingent valuation to quantify monetary compensation levels that landowners were willing to accept to adopt forest management restrictions to facilitate ecosystem services. The willingness to accept (WTA) compensation levels ranged from $190.22 to $595.23/ha/year. Higher compensation was required with a higher level of management restrictions. WTA compensation to implement forest management activities was positively associated with bid level and long-term investment goal. Findings will be useful in facilitating outreach activities in terms of identifying groups of interested landowners, forest land available for multiple ecosystem service production, and quantifying the total cost of implementing forest management facilitating an increased production of ecosystem services.

I takt med att maskininlärning utvecklats under senare år har skapandet av så kallade deep fakes, falsk media skapad med denna teknik, oftast video eller bilder, blivit lättare. Röstkloner är ett ämne inom talteknologin som kan sägas vara motsvarigheten för deep fakes för röster. Tidigare studier har redovisat nya tekniker för att använda neurala nätverk för att återskapa trovärdiga kloner av människors röster, men få studier har gjorts på de perceptionella faktorerna hos en människas förmåga att avgöra äktheten hos kloner. Vi gjorde därför en studie med en manlig och en kvinnlig röstklon där deltagare som var bekanta med talarnas röster sen tidigare fick avgöra äktheten hos en serie klipp varibland röstkloner var inkluderade. Frekvensomfånget begränsades i klippen i olika utsträckning för att undersöka om det fanns ett samband mellan omfången och deltagarnas förmågor. Resultaten av undersökningen visar att frekvensomfången inte hade någon statistiskt signifikant påverkan och att de avgörande faktorerna istället var prosodi och förekomsten av artefakter i ljudklippen. Däremot fanns det en betydlig skillnad mellan framgången att genomskåda den manliga röstklonen gentemot den kvinnliga, där deltagarna i större utsträckning genomskådade den manliga. / As machine learning has advanced in later years the creation of deep fakes, fake media created using this technology, most often video or images, has become easier. Voice cloning is a subject in speech technology that can be said to be the equivalent of deep fakes for voices. Earlier studies have proposed new techniques to use neural networks to create believable clones of human voices, but few studies have been made concerning the perceptual factors of the human ability to discern the authenticity in voice clones. Therefore we made a study with one male and one female voice clone where participants familiar with the speaker’s voices determined the authenticity of a series of clips wherein voice clones were included. Different frequency ranges were applied in order to analyse if there was a correlation between the frequency ranges and the participants’ abilities. The results of the study show that the frequency range did not make a statistically significant difference and that the determining factors instead were prosody and artefacts in the sound clips. However, there was a significant difference between the success of detecting the male and female voice clone, where the participants more frequently detected the male voice clone.

This dissertation investigated the effects of complex backgrounds on mental rotation. Stimulus familiarity and background familiarity were manipulated. It systematically explored how familiarizing participants to objects and complex backgrounds affects their performance on a mental rotation task involving complex backgrounds. This study had 113 participants recruited through the UCF Psychology SONA system. Participants were familiarized with a stimulus in a task where they were told to distinguish the stimulus from 3 other stimuli. A similar procedure was used to familiarize the backgrounds. The research design was a 2 stimulus familiarity (Familiarized with the Target Stimulus, not familiarized with the Target Stimulus) by 2 background familiarity (Familiarized with Target Background, not familiarized with Target Background 1) by 2 stimulus response condition (Target Stimulus, Non-Target Stimulus) by 3 background response condition (Target Background, Non-Target Background, Blank Background) by 12 degree of rotation (0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330) mixed design. The study utilized target stimulus and target background familiarity conditions as the between-subjects variables. Background, stimulus, and degree of rotation were within-subjects variables. The participants' performance was measured using reaction time and percent of errors. Reaction time was computed using only the correct responses. After the familiarization task, participants engaged in a mental rotation task featuring stimuli and backgrounds that were present or not present in the familiarization task. A 2 (stimulus familiarization condition) by 2 (background familiarization condition) by 2 (stimulus response condition) by 3 (background response condition) by 12 (degree of rotation) mixed ANOVA was computed utilizing reaction time and percent of errors. Results suggest that familiarity with the Target Background had the largest effect on improving performance across response conditions. The results also suggest that familiarity with both the Target Stimulus and Target Background promoted inefficient mental rotation strategies which resulted in no significant differences between participants familiarized with neither the Target Stimulus nor the Target Background. Theoretical conclusions are drawn about stimulus familiarity and background familiarity. Future studies should investigate the effects of long term familiarity practice on mental rotation and complex backgrounds.

In the last five years, the world has experienced unexpected tragic events and natural disasters. However, international tourism is expected to grow continually and tourists are therefore becoming more concerned with safety and security during their international travel. This dissertation investigated individuals' risk perception of vacationing at two scenario international destinations, Australia and Japan. While ten dimensions of perceived risk in international leisure travel were identified in the literature and one additional dimension of "Communication Risk" was proposed for this study, only seven dimensions were found in this study: "Health Risk," "Value Risk," "Psychological Risk," "Social Risk," "Terrorism Risk," "Equipment Risk," and "Communication Risk." The other four dimensions — "Financial Risk," "Time Risk," "Satisfaction Risk," and "Political Instability Risk" — were either merged into other dimensions or did not appear as an independent dimension in this study. The "Communication Risk" which was proposed in this study was found to be a valid dimension of perceived risk in vacationing at international destinations. The relationships of perceived risk to other factors were also examined. Individuals' characteristics of novelty seeking were negatively related to their risk perception, as were individuals' proficiency of the destination's native language. Those who have experience visiting the destination tended to perceive less risk in vacationing at the destination; the more familiarity/expertise with the destination, the less risk was perceived. When an individual perceived a higher level of risk towards a destination, s/he was less likely to vacation at the destination. Individuals were more likely to choose a packaged tour than independent travel when they had a higher level of risk perception towards vacationing at a particular international destination. / Ph. D.

In this thesis, I investigate idiom processing from two angles through three different studies. First, I approached idiom processing from a constraint-based perspective. According to this view, not all idioms are alike: they can differ regarding lexical, and linguistic characteristics, such as their level of familiarity. In this first study, I investigated the underlying processes during the comprehension of idioms with different characteristics. I used the Event Related Potential (ERP) technique, which has high temporal resolution, to investigate this issue. I provided evidence that idioms' characteristics impact their processing. More specifically, idioms which are more familiar to language users (i.e., the ones that are encountered more frequently) showed processing facilitation compared to less familiar idioms. Also, idioms with plausible literal interpretation showed processing advantages over idioms which are less likely to be interpreted literally. The second aim of the current thesis was to investigate idiom processing from an embodied account of language processing. According to this view, various sources of information (including linguistic, affective, and sensory-motor) are available and used during the comprehension of language. While, this view has become popular in many language processing studies, studies of idiom processing are still at the beginning of this journey. To be able to investigate idiom processing while considering the role of affective and sensory-motor factors, we require access to norming data. In the second (descriptive) study, I conducted a large-scale survey and collected measures of valence, arousal, concreteness, and imageability for a set of English idioms, by both native speakers of English and proficient second language speakers. In the last study, I explored how the emotional status of idioms and their concreteness contributes to their processing, and whether this contribution is modulated by idiom familiarity. We found that the impact of non-linguistic sources of information (affective and sensory-motor) is determined by idiom familiarity, such that low familiar and high familiar idioms show different behaviour where these factors are concerned. For highly familiar idioms, behaviour aligns with the findings on word processing: for example, idioms with more positive valence showed facilitative processing. Unlike highly familiar idioms, valence had an inhibitory impact on idioms with low familiarity level, such that greater valence increased the reading time.

No description available.

This study investigates Swedish upper secondary students’ familiarity with English idioms, and whether or not there are differences depending on what level of proficiency the students are at. The participating students took an idiom familiarity test adapted from Nippold & Rudzinski (1993) which aimed at measuring students’ familiarity with a number of English idioms. The test included 15 items, and was designed to elicit responses based on a linear scale from 1 to 5. The results showed that there were differences depending on the year of English studies at upper-secondary school level. A possible conclusion is that students develop their idiom familiarity as they are being more exposed to English language both in school and outside of the school. The study has implications for the upper-secondary school English curriculum in Sweden.

The United States is in the midst of an opioid crisis. Fortunately, effective treatments for opioid use disorder exist (OUD); however, they are underutilized. Medications for opioid use disorder (MOUDs) decrease death by 50 %. These MOUDs are particularly relevant in the criminal justice population given that this population has a higher OUD disease burden but is less likely than the general population to receive this life-saving treatment. Research has identified negative attitudes toward MOUDs among corrections staff as a barrier to utilizing MOUDs. This thesis examines the relationships between community correction staff familiarity with methadone, one type of MOUD, and their opinions toward methadone using extant data from the Criminal Justice Drug Abuse Treatment Studies 2 (CJ-DATS 2) series. These data were collected between 2010-2012. The study was guided by the Knowledge-Attitude Behavior (KAB) model. The data are described using descriptive statistics, and I estimate logistic regressions to examine the relationship between respondent familiarity with methadone and their attitude toward methadone while controlling for other covariates. With a sample of 167 corrections employees, I found that corrections staff who agreed or strongly agreed with the statement that they were familiar with methadone had more positive methadone attitudes. Future research should examine the relationship between familiarity/knowledge, attitudes, and behaviors in other criminal justice settings and for other MOUDs (i.e., buprenorphine and naltrexone).

No description available.