Theses and Dissertations at Montana State University (MSU)
Permanent URI for this collectionhttps://scholarworks.montana.edu/handle/1/733
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Item The effects of message threat/reflection on psychological reactance in traffic safety messaging(Montana State University - Bozeman, College of Engineering, 2020) Townsend, Asher Campbell; Chairperson, Graduate Committee: Nicholas WardPsychological reactance is a motivation to regain a freedom after it has been lost or threatened, which has led people to largely resist the social influence of others (Steindl et al., 2015). Steindl et al. (2015, pg. 205) also define psychological reactance as 'an unpleasant motivational arousal that emerges when people experience a threat to or loss of their free behaviors.' Seat belt use and distracted driving are two of the highest-fatality behaviors and they pose the greatest threat to other drivers' health and safety on U.S. roadways (NHTSA, 2018a). The purpose of this research is to investigate whether psychological reactance may be a significant factor in influencing people's reactions and their choices to continually engage in risky behaviors. Moreover, this research looks at whether select individuals are more prone to experiencing reactance and how it may influence their willingness to follow driver safety messaging. Specifically, this research will investigate whether varying message threat and message reflection influence the amount of reactance experienced. Three main components of psychological reactance are of concern in the study: Reactance Attitude, Emotional Reactance, and Threat to Freedom. Each of these behaviors is measured for varying message conditions for two different message sets: one for Seat Belt Use and another for Distracted Driving. For the Emotional Reactance and Threat to Freedom reactance measures, there is a significant correlation between the measures and reactance proneness. It was found that as proneness increases, the resulting psychological reactance increases as well. For the Distracted Driving messages, there was a significant effect of Message Threat for the Emotional Reactance and Threat to Freedom conditions such that low threat messages elicited less psychological reactance than high threat messages. From this study, we recommend the following aspects for designing traffic safety messages: 1) Messages should use non-controlling language (consider, can, could, may, try) over controlling language (should, ought, must, need), 2) Messages should aim to be suggesting (try to do this), rather than commanding (you MUST do this!). Additionally, high threat messages may tend to elicit stronger reactance independent of reactance proneness, supporting the proposal of avoiding high threat messages for traffic safety.Item A Yellowstone snowroad rutting investigation: a comparison of tracks vs. tires and other contributing factors(Montana State University - Bozeman, College of Engineering, 2018) Phipps, Ry Edward; Chairperson, Graduate Committee: Daniel MillerYellowstone National Park (YNP) has been experiencing more snowroad rutting in the last ten years. Additionally, YNP has recently (winter 2013 -2014) been experimenting with permitting large low-pressure tire vehicles to operate on the parks' snowroads. To gain a better understanding of snowroad degradation, YNP employed a team of snow scientists from Montana State University. In the winter of 2015, a large scale, two year, snowroad rutting study began in YNP. Parameters pertaining to snowroad strength and the difference in impact to the snowroads between tracked and wheeled vehicles were examined. This thesis in addition to Nelson's (2018) thesis produce a detailed overview of controllable and uncontrollable factors of maintaining and measuring impacts to the snowroads of Yellowstone National Park. Instruments were developed to collect data in the field and in the Sub-Zero Lab at Montana State University. These instruments allowed researchers to quantify crucial differences between vehicle types and the behaviors associated with them. Once data was collected, the data was post-processed in various ways to analyze trends pertaining to snowroad strength and degradation. With the data processed and analyzed, the profilometer and hardness data proved to be the most informative on snowroad degradation tendencies, however, the other instruments helped reinforce conclusions made with the hardness and profilometer data. The process of taking subsurface measurements on vehicle pass-bys, allowed researchers to confirm that rutting is most closely tied to vehicle-surface interactions (~ top 10 cms). It was determined that wheeled and tracked coaches can both cause ruts but by different processes. Wheeled vehicles are primarily causing ruts through compaction whereas tracked vehicles primarily cause ruts through a process of snow displacement. Ruts form from wheeled coaches but after subsequent passes the cross-sectional area of the rut tends to level off, especially when inflation pressure is decreased. While tracked vehicles' ruts continue to grow in size after subsequent passes. Additionally, snowroad hardness was affected differently between tracks and tires. Tracks and tires at higher pressures (> or = 62 kPa) tended to more often soften the snowroad, whereas lower pressure tires (< 62 kPa) tended to harden the snowroad.Item Thermal model of highway overpass bridge(Montana State University - Bozeman, College of Engineering, 2003) Bunger, Tylar Paul; Chairperson, Graduate Committee: Edward E. AdamsItem A spectrually integrated temporal albedo model for thin composite layers of snow and ice on roads(Montana State University - Bozeman, College of Engineering, 2001) Beddoe, Andrew GregoryItem Optimization of the number of elements for thermal maps utilizing Radtherm/RT(Montana State University - Bozeman, College of Engineering, 2003) Bristow, Allison Elizabeth; Chairperson, Graduate Committee: Edward E. Adams