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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.
431

System of Systems Engineering for Policy Design

Bristow, Michele Mei-Ting January 2013 (has links)
A system of systems (SoS) framework is proposed for policy design that takes into account the value systems of multiple participants, harnesses the complexity of strategic interactions among participants, and confronts the risks and uncertainties present in participants’ decision making. SoS thinking provides an integrative and adaptive mindset, which is needed to tackle policy challenges characterized by conflict, complexity, and uncertainty. With the aim of putting SoS thinking into practice, operational methods and tools are presented herein. Specifically, SoS engineering methodologies to create value system models, agent-based models of competitive and cooperative behaviour under conflict, and risk management models are developed and integrated into the framework. The proposed structure, methods and tools can be utilized to organize policy design discourse. Communication among participants involved in the policy discussion is structured around SoS models, which are used to integrate multiple perspectives of a system and to test the effectiveness of policies in achieving desirable outcomes under varying conditions. In order to demonstrate the proposed methods and tools that have been developed to enliven policy design discourse, a theoretical common-pool resources dilemma is utilized. The generic application illustrates the methodology of constructing ordinal preferences from values. Also, it is used to validate the agent-based modeling and simulation platform as a tool to investigate strategic interactions among participants and harness the potential to influence and enable participants to achieve desirable outcomes. A real-world common pool resources dilemma in the provisioning and security considerations of the Straits of Malacca and Singapore is examined and employed as a case study for applying strategic conflict models in risk management. Overall, this thesis advances the theory and application of SoS engineering and focuses on understanding value systems, handling complexity in terms of conflict dynamics, and finally, enhancing risk management.
432

System of Systems Engineering for Policy Design

Bristow, Michele Mei-Ting January 2013 (has links)
A system of systems (SoS) framework is proposed for policy design that takes into account the value systems of multiple participants, harnesses the complexity of strategic interactions among participants, and confronts the risks and uncertainties present in participants’ decision making. SoS thinking provides an integrative and adaptive mindset, which is needed to tackle policy challenges characterized by conflict, complexity, and uncertainty. With the aim of putting SoS thinking into practice, operational methods and tools are presented herein. Specifically, SoS engineering methodologies to create value system models, agent-based models of competitive and cooperative behaviour under conflict, and risk management models are developed and integrated into the framework. The proposed structure, methods and tools can be utilized to organize policy design discourse. Communication among participants involved in the policy discussion is structured around SoS models, which are used to integrate multiple perspectives of a system and to test the effectiveness of policies in achieving desirable outcomes under varying conditions. In order to demonstrate the proposed methods and tools that have been developed to enliven policy design discourse, a theoretical common-pool resources dilemma is utilized. The generic application illustrates the methodology of constructing ordinal preferences from values. Also, it is used to validate the agent-based modeling and simulation platform as a tool to investigate strategic interactions among participants and harness the potential to influence and enable participants to achieve desirable outcomes. A real-world common pool resources dilemma in the provisioning and security considerations of the Straits of Malacca and Singapore is examined and employed as a case study for applying strategic conflict models in risk management. Overall, this thesis advances the theory and application of SoS engineering and focuses on understanding value systems, handling complexity in terms of conflict dynamics, and finally, enhancing risk management.
433

Environnement dissuasif, risques et stratégies délinquantes

Beaudoin, Isabelle 05 1900 (has links)
L‟utilité de la théorie de la dissuasion est régulièrement remise en question pour expliquer la relation entre les peines et la criminalité puisque les propriétés objectives de la peine ne semblent pas affecter les taux de criminalité, les perceptions que s‟en font les individus et la récidive des délinquants. Trois limites conceptuelles des auteurs qui remettent en question la dissuasion sont soulevées. Premièrement, les unités spatiales utilisées sont des territoires sur lesquels plusieurs corps policiers sont en fonction. Il y a donc peu de chances que tous les citoyens présents soient exposés au même message pénal. Deuxièmement, les chercheurs ont mesuré le risque objectif d‟être arrêté à l‟aide d‟un ratio entre le nombre d‟arrestations et le nombre de crimes rapportés. Cette conceptualisation est problématique puisque les résultats d‟autres études suggèrent que les citoyens ont peu de connaissances des propriétés objectives et qu‟il serait, ainsi, intéressant de se référer aux stimuli dissuasifs pour conceptualiser la notion de risques. Troisièmement, pour plusieurs chercheurs, la délinquance est considérée comme une activité pour laquelle les délits impunis découlent du hasard. Pourtant, les délinquants utilisent fréquemment des stratégies pour éviter les autorités policières. Ils sont donc proactifs dans leur impunité. De ces limites découlent quatre propositions : 1) afin de détecter les réels effets des propriétés de la peine sur la criminalité, les territoires utilisés dans les études doivent représenter des juridictions sur lesquelles un seul corps policier opère; 2) afin de détecter les réels effets des propriétés de la peine sur la criminalité, les études doivent être effectuées avec des données provenant d‟une juridiction dans laquelle les activités de répression sont augmentées significativement par rapport à leur seuil antérieur et maintenue sur une période de temps suffisamment longue; 3) les stimuli dissuasifs observés doivent être considérés comme des expériences vicariantes ; 4) l‟impunité doit être définie comme étant une expérience recherchée par les délinquants. Deux études ont été réalisées dans le cadre de cette thèse. D‟abord, une étude a été réalisée à l‟aide de données issues des rapports policiers de collisions et des constats d‟infraction rendus. Les résultats montrent que l‟augmentation de la répression policière ii sur le territoire du Service de Police de la Ville de Montréal a fait diminuer le nombre de collisions. Au même moment, les collisions sont demeurées stables sur le territoire desservis par le Service de police de la Ville de Québec. Dans un deuxième temps, une étude perceptuelle a été réalisée avec un échantillon d‟étudiants universitaires. Les résultats démontrent des effets mitigés des stimuli dissuasifs sur les perceptions que se font les individus de leurs risques d‟être arrêté et sur leurs comportements délinquants. Chez les moins délinquants, les stimuli dissuasifs font augmenter la perception que les délinquants se font de leurs risques. Par contre, les plus motivés à commettre des délits de la route développent des stratégies en réaction aux opérations policières plutôt que d‟en craindre les représailles. Ces tactiques d‟évitement n‟assurent pas une impunité totale, ni une perception moins élevée des risques de recevoir une contravention, mais elles retardent le moment où le délinquant sera confronté à la punition. / Deterrence theory has been rightfully challenged when changes in punishment probability or severity had no impact on crime rates, recidivism or risks' perception. We suggest that these unconclusive results are, in large part, caused by theoretical and conceptual flaws. First, changes in objective properties of punishment are assumed to be equally perceived across multiple spatial units or police jurisdictions. We have reason to believe that this is rarely the case. Second, the objective risks of being arrested are generally measured with a ratio between the number of arrests and the number of crimes reported. This conceptualization is problematic because numerous researchers found that people have little knowledge of these objective properties. Third, deterrence research have limited interest for adaptative strategies used by offenders to counteract the perceived increase in punishment severity or certainty. We believe that offenders' actively seek and adopt these avoidance tactics. Four propositions are developed to adress thoses limits: 1) to detect the potential local or micro effects of punishment on crime, different police jurisdictions are analysed separatly; 2) to detect the potential effects of punishment on crime, studies should be made only in jurisdictions where enforcement levels are objectively increasing; 3) observed deterrent stimuli should be regarded as vicarious experiences; 4) impunity must be viewed as an actively seeked experience. Two studies were conducted as part of this thesis. Using reports of crashes and statements of offense reports from the Montreal police traffic unit, the first study found that a sharp increase in the level of police activities had significant impact on the number of collisions. Over the same period, data from the second largest city in the province of Québec (the control area), showed no noticeable increase in punishment probility and consequently, no significant impact on collisions. The second study was based on the perception of risks and patterns of road delinquency for a sample of university students with a driver license. Results show distinctive effects of deterrence stimuli for drivers with different delinquency habits. For conformists drivers, the iv deterrent stimuli increase the perception of risk but had no impact on their (already low) levels of road delinquency. For the most motivated traffic offenders however, deterrence stimuli seem to motivate the use and diversity of arrest avoidance techniques that circumvent any increase in their perception of risks. These avoidance tactics do not provide total impunity but efficiently decrease punishment probabilities for those willing to maintain the same offending patterns.
434

影響大眾環境風險認知及政策支持因素之跨層次分析 / Predicting Environmental Risk Perception and Policy Support: A Multilevel Model

蘇民欣, Su, Min Hsin Unknown Date (has links)
本研究旨在探討利己及利他價值觀如何影響大眾環境風險認知及政策支持,並進一步探討其影響是否受到風險規模、文化取向、及國家發展程度之影響。資料來源為世界價值觀調查(World Value Survey)第五波資料,以Schwartz的「人類價值觀理論」為理論基礎,測量個人利己及利他價值觀,並依風險規模將環境風險認知分為全球性及地區性。統計方法使用層級迴歸,同時檢驗國家層級變項(文化取向及發展程度)對個人層級變項之跨層級調節效果。研究結果顯示大眾對環境風險的感知及反應,受到其價值觀的影響,但針對不同規模的風險議題,在不同文化取向及發展程度的國家,其影響有顯著不同。 / Environmental issues have received much public and media attention abroad and at home. With the increased environmental awareness, there is a strong call for relevant policies and regulations aimed at sustainable development. To ensure sufficient public support, it is crucial to develop a fuller understanding of factors and processes underlying people’s willingness to help protect the environment when making decisions as consumers and citizens. This study aims to predict people’s environmental risk perception and policy support as a function of their values. Specifically, Schwartz’s self-transcendence and self-enhancement value clusters will be examined as determinants to understand why few people choose to make collectively beneficial decisions. Three extensions were made. First, instead of focusing on low-cost lifestyle changes, this study examined policy support that requires substantial personal costs. Second, global and local environmental risk perceptions are treated as two qualitatively different constructs according to their geographical scales. Finally, this study moves beyond an individualistic approach, incorporating country-level forces into the model. Information about the individuals are based on variables measured in the World Value Survey (2005), while cultural orientations and levels of development are measured by the Schwartz Value Survey (2005) and the Human Development Index (2005) respectively. Hierarchical regression are employed, with the nature of interaction being revealed by plotting techniques. The results suggested that perception and responses to environmental risks reflect their most basic value priorities and life goals. Consequently, environmental persuasive messages are most effective when intended behaviors are framed as fulfilling important life goals. However, the effects of person-level constructs greatly vary with social contexts and issue scales, suggesting that different strategies are preferred when dealing with risks associated with different geographical frame. Finally, cultural orientations and levels of development will influence the way members of a society respond to environmental threats. Practical implications for environmental risk communication are proposed and discussed.
435

在招募情境中變動薪資比例、加薪型態對組織吸引力之影響-風險知覺之中介效果 / The Influences of type of variable pay ratio and type of pay increases on applicants' organizational attraction : the moderating effect of risk perception

蘇倍儀, Su, Pei I Unknown Date (has links)
本研究欲瞭解在模擬招募情境中,兩個薪資特徵-「變動薪資比例」 與「加薪型態」,分別對組織吸引力之影響,並探討此兩組關係中「風險 知覺」的中介效果與「性格變項(核心自我評價)」的調節效果。本研究 採2x2 受試者間之實驗設計,所操弄的二個獨變項為:1.變動薪資比例 (高、低);2.加薪型態(高機率低加薪、低機率高加薪),依變項為整 體「組織吸引力」及其三個向度(組織正向情感、雇主評價、求職行動 意圖)。 本研究之受試者為139 位大學應屆畢業生,研究結果顯示:「變動薪 資比例」越高,受試者感受的「風險知覺」越高;但「加薪型態」與受 試者的「風險知覺」無顯著關係。當受試者的「風險知覺」較高時,其 組織正向情感、雇主評價則較低;然而,變動薪資比例、加薪型態與組 織吸引力無顯著關係。雖然核心自我評價並沒有調節「變動薪資比例」 或「加薪型態」與組織吸引力的關係;可是核心自我評價卻調節「風險 知覺」與整體組織吸引力與其二個子向度(組織正向情感、求職行動意 圖)的關係。 研究者分別就結果加以討論,提出可能的解釋,並說明本研究之限 制與貢獻。 / This paper presents an experimental investigation of the influences of type of variable pay ratio and type of pay increases on overall organizational attraction and its three dimensions: affection, intentions toward the company and company prestige. A 2x2 between subjects design was used. Two independent variables were types of variable pay ratio (high/ low) and types of pay increases (high probability, small pay increases/ low probability, large pay increases). The dependent variable was organizational attraction. Risk perception and core self-evaluation were mediating and moderating variable, respectively. The sample comprised 139 college students approaching graduation. The results demonstrated that higher variable pay ratio caused higher risk perception but type of pay increases did not. Higher risk perception caused lower affection, company prestige; however, type of variable pay ratio and type of pay increases did not. Core self-evaluation did not mediate the relationship between type of variable pay ratio and risk perception, but it mediated the relationship between risk perception and overall organizational attraction and its two of three dimensions (affection, intentions toward the company). Based on the results, alternative explanation, limits, and implications were discussed.
436

Riskperception vs. beteende : En kvantitativ enkätstudie om riskperception och säkerhetsbeteende / Risk perception vs. Behavior. : A quantitative survey of risk perception and safety behavior

Henriksson Severin, Adrian January 2018 (has links)
Den här undersökningen utgår från teorier om riskperception och Theory of Planned Behaviour (TPB). Syftet med studien var att, med utgångspunkt i teorier om riskperception och Theory of Planned Behaviour (TPB), undersöka individers riskperception och säkerhetsbeteende gentemot trafikolyckor. Undersökningen ville också studera om riskperceptionen och säkerhetsbeteendet är varierar beroende på vem som riskeras att utsättas för risken och vem som ska utföra ett visst beteende. Vidare kopplas det till bakgrundsvariabler som kön och tidigare erfarenheter. Studien utfördes i svensk kontext. Metoden var av kvantitativ ansats och datainsamlingsmetod var enkätstudier. Enkäten var konstruerad utifrån teorierna och undersökningen syfte. Enkäten spreds på Facebook och hade ett bekvämlighetsurval. Totalt svarade 102 personer på enkäten. Studien kom fram till att tidigare erfarenheter har en mycket liten inverkan på individens riskperception av trafikolyckor, både vad gäller risken för individen personligen men också risken för människor i allmänhet. Kön däremot påverkar individens riskperception i högre grad. En annan slutsats var att tidigare erfarenheter har mycket liten påverkan på människors säkerhetsbeteende, både för individens eget beteende men också för individens benägenhet att uppmana människor i allmänhet att bete sig på ett visst sätt. Vidare visade det sig att kön har större påverkan på säkerhetsbeteendet, både vad gäller individen eget beteende men också individens tendens att uppmana människor i allmänhet. En sista upptäckt var att studien fann att riskperception och beteende inte är oberoende av varandra där den ena påverkas av den andra utan snarare är de beroende av och påverkar varandra.  En notis är att undersökning fann att lagar kan skapa ett medvetet säkerhetsarbete. Det innebär att den nya lagen om mobilanvändning vid bilkörning i Sverige är rätt väg att gå för att skapa ett säkert beteende. / This study is based on theories of risk perception and Theory of Planned Behavior (TPB). The purpose of the study was to investigate individuals' risk perception and safety behavior in relation to traffic accidents, based on theories of risk perception and Theory of Planned Behavior (TPB). The survey also wanted to study whether risk perception and safety behavior vary depending on who is at risk of being exposed to the risk and who should perform a certain behavior. Furthermore, it is linked to background variables like gender and previous experiences. The study was conducted in Swedish context. The method was quantitative and data method was questionnaire. The survey was based on the theories and the investigation purpose. Furthermore, the survey was spread on Facebook and had a comfort check. In total, 102 people answered the questionnaire. The study found that past experience has a very small impact on individuals' risk perception of traffic accidents, both in terms of the individual's risk but also the risk for people in general. Gender, on the other hand, affects the individual's risk perception to a greater extent. Research also found that previous experiences have a very small impact on the safety behavior of individuals, both in terms of the risk of the individual's own behavior but also regarding the individual's requests for people in general. Furthermore, it has been shown that gender has an influence on safety behavior, both regarding the risk of the individual's own behavior, but also regarding the individual's requests for people in general. Finally, the study found that risk perception and behavior are not independent of each other where one is influenced by the other, but rather they depend on and affect each other. One note is that the study showed that laws can create a conscious security work. This means that the new law on mobile use when driving in Sweden is the right way to go to manifest safe behavior.
437

La couverture des risques extremes de catastrophes naturelles : analyse théorique et empirique / Natural Catastrophe Risk Insurance : theory and empirical analysis

Zawali, Naima 09 January 2017 (has links)
L’objectif de cette thèse est de mener une réflexion sur les systèmes de couverture des risques de catastrophes naturelles en accordant une place particulière à la perception que les agents économiques ont des caractéristiques de ces risques. Il s’agit d’une part de mieux comprendre les déterminants des systèmes de couverture existant dans le monde et des comportements individuels, et d’autre part de comparer les différentes formes d’intervention publique face à ces risques. Nos travaux, essentiellement empiriques, s’appuient sur des données statistiques issues d’organismes internationaux et de centres de recherche sur les risques, mais aussi sur des données comportementales issue d’une expérience contrôlée. La typologie des systèmes d’assurance contre le risque d’inondation dans le monde que nous élaborons montre que le système public est globalement dominant et surtout appliqué dans les pays à faible revenu et à forte exposition au risque, le système mixte public/privé étant principalement appliqué dans des pays riches et relativement peu exposés. Concernant la demande d’assurance, ladisponibilité à payer pour s’assurer contre les risques naturels est significativement plus faible que celle pour les autres risques et ce, indépendamment des probabilités et des montants de perte. En comparant différents systèmes d’intervention publique, nous montrons que la mesure la plus efficace semble être une subvention de la prime d’assurance, mais qui peut être très coûteuse si la population est majoritairement composée d’individus présentant de forts biais dans la perception des risques. / The objective of this thesis is to better understand the determinants of natural catastrophe insurance systems in the world, as well as of individual behavior towards these risks. We also compare the efficiency of different public intervention forms in catastrophe risk management. Our data come from international organizations, research centers and one controlled experiment. From the typology of countries in terms of flood insurance that we elaborate it appears that the publicly provided flood insurance system is globally dominant and mainly applied in low-income countries with high risk exposure. Mixed public / private system are mainly applied in rich countries with low risk exposure. Concerning insurance demand, the willingness to pay for insurance is significantly lower for catastrophe risks than for other, standard risks, regardless of probability and amount of loss. Comparing different public intervention systems, we show that the most efficient measure is insurance premium subsidy but its costs can be very high for individual whose risk perception is biased.
438

Sistema Web-GIS participativo associado a indicadores de gestão descentralizada de risco de inundações / A participatory web-GIS system associated to decentralized flood risk management indicators

Ignazio Giuntoli 12 August 2008 (has links)
A presente pesquisa propôs o desenvolvimento e a aplicação de um web-GIS interativo alimentado por usuários visando ao mapeamento do risco de inundações por meio da coleta de dados de ameaça, exposição e vulnerabilidade percebidos pela população. Foi também estimado o risco de inundação a partir de uma expressão de indicadores propostos por Mendiondo (2008). As duas metodologias foram aplicadas em sub-bacias urbanas da cidade de São Carlos. Foram realizadas entrevistas com a população da cidade para coletar dados de percepção de risco, enquanto se desenvolvia o web-GIS, para o qual, uma vez terminado, foram transferidos os referidos dados online. O portal se mostrou uma ferramenta de uso simples e confiável. As estimativas de risco calculadas por meio da expressão citada levaram a concluir que as sub-bacias com maior risco de inundação são as dos córregos Tijuco Preto e Medeiros. Entretanto, o risco estimado a partir da análise de percepção evidenciou as sub-bacias Gregório e Santa Maria Madalena como as de maior risco de inundação. As duas ferramentas apresentaram-se valiosas e econômicas para estimativa de risco de inundação em ambiente urbano, podendo constituir ótimos sistemas de apoio à decisão. O webGIS, em particular, é potencialmente útil para informar aos moradores sobre quais são as áreas de risco de inundação na cidade. / This dissertation presents the development and application of an interactive web-GIS in which internet users map flood risk collaboratively by filling up a geotagged form with questions on flood hazard, exposure and vulnerability. Flood risk was also assessed through the use of a set of environmental risk indicators proposed by Mendiondo (2008). The two methodologies were applied to six urban watersheds of the city of São Carlos (State of São Paulo, Brazil). Interviews including questions asked on the web-GIS were carried out in city streets while the portal was being developed. Thus perceived risk data gathered from the interviews was later transferred online onto the web-GIS. The web-GIS proved to be an easy to use and intuitive tool. According to the results of risk calculation obtained with the indicators expression the watersheds with higher flood risk were the Tijuco Preto and Medeiros, which were also the ones with smallest area and higher population density. The results of perceived risk, which was assessed through the analysis of the interviews data, gave evidence that Gregorio and Santa Maria Madalena where the watersheds at higher risk. These watersheds are the two which experience a higher rate of occurrence on a year basis. The two approaches for assessing risk proved to be consistent and relatively inexpensive for the estimate of flood risk in urban areas, with the potential of representing valid decision support systems. The webGIS is a particularly interesting solution as a medium of information to inhabitants on the level of risk to which they are exposed.
439

Approche psychosociale des effets de l'identité sexuée sur les comportements à risque déclarés au volant et dans différents domaines chez les jeunes conducteurs / Psychosocial approach of the effects of gender identity on declared risky driving behaviours and risk-taking behaviours in various other domains among young drivers

Guého, Ludivine 14 December 2015 (has links)
Ce travail a pour objectif d’interroger l’influence de l’identité sexuée sur les comportements à risque au volant des jeunes conducteurs. Il s’organise autour de trois axes. Le premier porte sur la validation des outils de mesure et d’activation de l’identité sexuée (études 1-4). Le deuxième porte sur la validation d’outils de mesure des comportements à risque au volant, de la prise de risque et de la perception du risque et des bénéfices dans différents domaines, et sur la mise en relation de la conformité aux stéréotypes de sexe avec ces différentes variables chez des tout-venants (études 5 & 6). Le troisième axe (étude 7) vise à tester l’effet de l’identité sexuée dans sa multidimensionnalité (i.e., conformité aux stéréotypes de sexe et identification à son groupe de sexe) sur les comportements à risque déclarés et le risque perçu chez les jeunes conducteurs. Les effets de l’identité sexuée dans le domaine routier et dans différents domaines sont comparés et la relation de causalité entre identité sexuée et comportements à risque, testée. Les résultats montrent un lien entre l’identité sexuée et la prise de risque et le risque et les bénéfices perçus qui varie en fonction du domaine et du sexe. Toutefois, ils ne permettent pas de conclure à un effet plus marqué de l’identité sexuée dans le domaine routier, ni de montrer la relation de causalité entre identité sexuée et comportements à risque chez les jeunes conducteurs. Si les liens entre identité sexuée et prise de risque apparaissent complexes, ce travail montre l’intérêt de l’approche psychosociale pour comprendre les différences de sexe et intragroupes de sexe dans les comportements à risque. / The objective of this thesis is to study the influence of gender identity on the risk-taking behaviour of young drivers. The work is laid out in three main sections. The first one focuses on the validation of measurement tools and the activation of gender identity (studies 1-4) The second one focuses on the validation of tools designed to measure driver risk-taking behaviour, risk and benefits perception in various fields, and on the link between gender stereotype conformity and the aforementioned variables in a broad range of subjects (studies 5 & 6). The third section of this thesis (study 7) aims to test the effect of gender identity in the multi-dimensional sense (i.e., conformity to gender stereotypes and identification to one’s gender group) on declared risk-taking behaviour and risk perception among young drivers. The effects of gender identity on driving and on various other fields are compared and the causality between gender identity and risk-taking behaviour is tested. The results show a link between gender identity and risk-taking, risk perception and benefits perception, which varies according to the domain and gender. However, the results leave us unable to ascertain the existence of a stronger effect of gender identity on driving behaviour. They also impede the highlighting of a causality effect between gender identity and risky behaviour among young drivers. Even if the link between gender identity and risk-taking seems to be complex, this work demonstrates the importance of a psychosocial approach in understanding gender differences and differences within a gender group in risk-taking behaviour.
440

Food defense management plan implementation intention: an application of protection motivation theory

Yoon, Eunju January 1900 (has links)
Doctor of Philosophy / Department of Hotel, Restaurant, Institution Management and Dietetics / Carol W. Shanklin / Protection motivation theory (PMT) was used in this study to investigate food service directors' food bioterrorism risk perception and their intentions to implement a food defense management plan in their operations. A cross sectional study using the self administered survey was conducted to test hypotheses. All measurement items for the construct of interests were assessed using a 7-point Likert type scales. Questionnaires were mailed in March 2007 to a national sample of 2,200 randomly selected on-site food service directors employed in school districts and healthcare operations. A total 449 usable completed questionnaires were received. Descriptive statistics were performed to investigate directors' perceptions, motivations and intentions independently. Before testing the actual hypotheses, confirmatory factor analysis was conducted to assess reliability and construct validity of the measurement model. Food service directors perceived that the result of a food terrorist attack would be severe but the chances it would occur in their operations is limited. They agreed that implementation of a food defense management plan would be effective to address food terrorism issue in their operations. They were highly motivated to protect the operation from an attack and to avoid the risk of terrorism and intended to implement a food defense plan in their operation. Based on the hypotheses testing, results revealed that motivation to protect the operation against food bioterrorism is higher when directors perceived a higher level of risk (severity and vulnerability), rated the effectiveness of a food defense management plan in protecting the operation high, and perceived that their operations were able to implement it. In turn, high level of motivation to protect the operation led to higher level of implementation intention. Results of the study can be used to design communication resources developed to enhance food service directors' intention to implement a food defense management plan. Educational and informational resources related to intentional food contamination and its defense should emphasize response efficacy and possibility perception.

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