A superimitação é definida como uma tendência à cópia de todas as ações executadas por um modelo, mesmo as claramente irrelevantes. Os mecanismos motivacionais e a funcionalidade da superimitação ainda são pouco compreendidos, mas um possível sentido adaptativo estaria associado à opacidade causal de boa parte dos comportamentos socialmente aprendidos. Este fenômeno tem sido amplamente replicado em vários contextos e observado no comportamento de crianças de diversas faixas etárias e até mesmo de adultos. Apesar de sua aparente robustez, estudos têm relatado que a superimitação é sensível a algumas características do modelo. Estas evidências são compatíveis com a previsão de modelos teóricos de coevolução genes-cultura de que a aprendizagem social humana é influenciada por um conjunto de vieses cognitivos que permitem que a aquisição de informações ocorra de maneira seletiva, desfavorecendo a aprendizagem de comportamentos maladaptativos que podem estar disponíveis no contexto social. Este trabalho teve como objetivo investigar o efeito de informações relacionadas à competência ou incompetência de um modelo adulto sobre a fidelidade da cópia de ações relevantes e irrelevantes observadas por crianças de 5 anos de idade em uma tarefa. Foram testadas as influências de informações declaradas pelo próprio modelo e também por terceiros em uma conversa sobre o modelo. Adicionalmente, foram investigadas diferenças entre os sexos dos participantes quanto à fidelidade da cópia. Os resultados indicam um efeito fraco dos vieses de \"competência autodeclarada\" e de \"prestígio\" do modelo sobre a superimitação. Outras informações, potencialmente mais confiáveis (não manipuladas neste estudo), podem ter sido utilizadas pelas crianças para atribuição de competência ao modelo / Overimitation is defined by a tendency of copying all actions executed by a model, even the clearly irrelevants. The motivational mechanisms and functionality of overimitation still aren\'t well understood, but its possible adaptive meaning would be related to causal opacity of a great part of the socially learned behaviors. This phenomenon has been widely replicated in several contexts and observed in behavior of children of different ages and even in adults. Despite the seeming robustness of overimitation, studies showed that it is sensitive to some characteristics of the model. These evidences are consistent with the prediction of theoretical models of gene-culture coevolution that human social learning is affected by a set of cognitive biases that allow a selective acquisition of information, disadvantaging the learning of maladaptive behaviors that can be socially available. Our work intended to investigate the effect of information about the competence or incompetence of an adult model on the copy fidelity of relevant and irrelevant actions by five-year-old children in a task. We tested the influence of self-declared information about the model and also the same kind of information given by third-parties in a conversation about the model. We also investigate sex differences in copy fidelity. Our results reveal a weak effect of \"self-declared competence\" or \"prestige\" model-based biases on overimitation. Other information, potentially more reliable but not manipulated by us, could be used by the children to assign competence to the model

<p>On a daily basis drivers have to share the roads with a great number of other road users. To make the driving task possible every driver has to take the intentions and behaviours of other road users into account. In other words, the road users have to interact with each other. The general aim of this thesis was to examine factors that regulate and influence the interaction between road users. To do so, three studies, applying a social psychological approach to driving, were conducted. In the first study it was investigated how the rules of priority, the design of the intersection, and the behaviour of other drivers influence yielding behaviour in intersections. The second study examined driver irritation and its relationship with aggressive behaviours. Finally, in the third study drivers’ attributions of their own and other drivers’ behaviour were investigated in relation to driver irritation. The thesis also includes a minor field study, aiming at examining to what extent informal traffic rules are used in intersections and in roundabouts, as well as measuring the validity of self-reports. The results indicate that, in addition to the formal rules, drivers rely on informal rules based on road design and on other drivers’ behaviour. Drivers also differ with respect to strategies of yielding behaviour. Irritability and aggressive behaviour on the roads appear largely to depend on drivers’ interactions and drivers’ interpretation of the behaviour of others. Some aggressive behaviour is an expression of irritation and may provoke irritation of other drivers. This means that an irritated driver might start a chain reaction, spreading irritation and aggressive behaviour from driver to driver. To diminish irritation and aggressive behaviour on the roads it is necessary to change drivers’ behaviour either by changing the road design or, which is probably a more possible remedy, by changing their general attitudes about driving. By providing drivers with insight into the cognitive biases they are subject to when judging other road users’ behaviour, both driver irritation and aggressive behaviours on the roads probably would decrease.</p>

On a daily basis drivers have to share the roads with a great number of other road users. To make the driving task possible every driver has to take the intentions and behaviours of other road users into account. In other words, the road users have to interact with each other. The general aim of this thesis was to examine factors that regulate and influence the interaction between road users. To do so, three studies, applying a social psychological approach to driving, were conducted. In the first study it was investigated how the rules of priority, the design of the intersection, and the behaviour of other drivers influence yielding behaviour in intersections. The second study examined driver irritation and its relationship with aggressive behaviours. Finally, in the third study drivers’ attributions of their own and other drivers’ behaviour were investigated in relation to driver irritation. The thesis also includes a minor field study, aiming at examining to what extent informal traffic rules are used in intersections and in roundabouts, as well as measuring the validity of self-reports. The results indicate that, in addition to the formal rules, drivers rely on informal rules based on road design and on other drivers’ behaviour. Drivers also differ with respect to strategies of yielding behaviour. Irritability and aggressive behaviour on the roads appear largely to depend on drivers’ interactions and drivers’ interpretation of the behaviour of others. Some aggressive behaviour is an expression of irritation and may provoke irritation of other drivers. This means that an irritated driver might start a chain reaction, spreading irritation and aggressive behaviour from driver to driver. To diminish irritation and aggressive behaviour on the roads it is necessary to change drivers’ behaviour either by changing the road design or, which is probably a more possible remedy, by changing their general attitudes about driving. By providing drivers with insight into the cognitive biases they are subject to when judging other road users’ behaviour, both driver irritation and aggressive behaviours on the roads probably would decrease.

In an attempt to eradicate biases in substantive law and evidentiary procedures, legislative changes were implemented for sexual offences in 1983. Historically, biases in rape law had resulted in high attrition of cases at each stage of criminal justice processing, low conviction rates, and poor treatment of victims. The new legislation, which included the introduction of the offence 'sexual assault', was designed to emphasize the violent nature of sexual aggression rather than the sexual nature.<p> Law reform, however, is influenced by the response of the criminal justice personnel who must implement the new legislation. Judges are critical personnel within this framework because they both implement the reform in individual court cases and interpret the meaning of the new law. It is critical, therefore, to examine judicial understanding of the social, political, and economic meaning of the law, and more specifically, to examine their understanding of the nature of sexual violence.<p> Using a content analysis of 109 'remarks at sentencing', this study examines the impact of the 1983 reform on judicial definitions of sexual violence. The sentencing 'transcripts' are drawn from 66 sexual offence cases heard at the Court of Appeal for Saskatchewan between 1975-1988. Transcripts are analyzed for the absence or presence of references to each of 9 themes (violence, coercion, physical impact of the offence on the victim, psychological impact of the offence on the victim, breach of trust, the significance of penetration, the accused's criminal history, the role of alcohol or drug abuse, and the accused's control over his sexual drive). Each theme reflects an influential variable in judicial decision-making concerning sexual offences.<p> The results of the study indicated that since 1983,frequently and suggest that judges are attempting to reflect the 3 tier classification of sexual assault outlined in the new legislation. At the same time, however, judicial definitions of these variables continue to reflect stereotypes and myths associated with sexual violence. Judicial responses to sexual violence tend to minimize the culpability of sexual offenders and to minimize the seriousness of the offence. One of the most significant findings was that the 'sexual' element continues to dominate judicial definitions of sexual aggression rather than the 'violent' element. This emphasis implies that 'coercive' sexual acts have the same sexual character as 'consensual' sexual acts.<p> It appears, therefore, that the reform has been unsuccessful in meeting its objectives at the judicial level. However, the small change which has occurred may lay the groundwork for further change in the future.

In the field of cognitive science, as well as the area of Artificial Intelligence (AI), the role of context has been investigated in many forms, and for many purposes. It is clear in both areas that consideration of contextual information is important. However, the significance of context has not been emphasized in the Bayesian networks literature. We suggest that consideration of context is necessary for acquiring knowledge about a situation and for refining current representational models that are potentially erroneous due to hidden independencies in the data.<p>In this thesis, we make several contributions towards the automation of contextual consideration by discovering useful contexts from probability distributions. We show how context-specific independencies in Bayesian networks and discovery algorithms, traditionally used for efficient probabilistic inference can contribute to the identification of contexts, and in turn can provide insight on otherwise puzzling situations. Also, consideration of context can help clarify otherwise counter intuitive puzzles, such as those that result in instances of Simpson's paradox. In the social sciences, the branch of attribution theory is context-sensitive. We suggest a method to distinguish between <i>dispositional causes</i> and <i>situational factors</i> by means of contextual models. Finally, we address the work of Cheng and Novick dealing with causal attribution by human adults. Their <i>probabilistic contrast model</i> makes use of contextual information, called focal sets, that must be determined by a human expert. We suggest a method for discovering complete <i>focal sets</i> from probabilistic distributions, without the human expert.

Existing research investigating human judgment and decision making describes patterns of systematic biases in the way people process information and make decisions. Framing effects, for example, demonstrate that logically equivalent alternatives presented in divergent linguistic frames can lead to systematically different choice outcomes; in general, people demonstrate a preference for risk-averse behaviour when information is framed positively and risk-seeking behaviour when information is framed negatively. Similarly, the status quo bias describes a tendency for decision makers to maintain current or previous decisions when confronted with the availability of new options, demonstrating that people possess a predisposition to continue with established behaviour. This research proposes that the goals a decision maker adopts and the hedonic tone of the stimulus being evaluated influence whether framing effects are observed; similarly, the past performance of the status quo and complexity of available options influence whether participants exhibit a preference for the status quo. Using a survey-based experimental methodology, the aforementioned propositions are investigated by systematically manipulating characteristics of decision problems in order to reveal the mechanisms which influence the emergence of framing effects and the status quo bias. The results demonstrate that when positive goals or stimuli are emphasized, usual framing effects are observed; that is, participants demonstrate a preference for risk-averse behaviour in the positive frame and risk-seeking behaviour in the negative frame. Conversely, when negative goals or stimuli are emphasized, participants fail to demonstrate the expected shift in risk-preference. Past performance and complexity of the available alternatives are also shown to influence preference for the status quo; specifically, participants demonstrate greater preference for the status quo when past performance is strong compared to when it is weak, and when the number of available options is low compared to when it is high. The findings of this research improve our understanding of how contextual factors influence shifts in preference and the emergence of decision making biases; moreover, the current research demonstrates the need for future research to consider the influence of situational and contextual factors when investigating decision making in particular and human behaviour in general.

Existing research investigating human judgment and decision making describes patterns of systematic biases in the way people process information and make decisions. Framing effects, for example, demonstrate that logically equivalent alternatives presented in divergent linguistic frames can lead to systematically different choice outcomes; in general, people demonstrate a preference for risk-averse behaviour when information is framed positively and risk-seeking behaviour when information is framed negatively. Similarly, the status quo bias describes a tendency for decision makers to maintain current or previous decisions when confronted with the availability of new options, demonstrating that people possess a predisposition to continue with established behaviour. This research proposes that the goals a decision maker adopts and the hedonic tone of the stimulus being evaluated influence whether framing effects are observed; similarly, the past performance of the status quo and complexity of available options influence whether participants exhibit a preference for the status quo. Using a survey-based experimental methodology, the aforementioned propositions are investigated by systematically manipulating characteristics of decision problems in order to reveal the mechanisms which influence the emergence of framing effects and the status quo bias. The results demonstrate that when positive goals or stimuli are emphasized, usual framing effects are observed; that is, participants demonstrate a preference for risk-averse behaviour in the positive frame and risk-seeking behaviour in the negative frame. Conversely, when negative goals or stimuli are emphasized, participants fail to demonstrate the expected shift in risk-preference. Past performance and complexity of the available alternatives are also shown to influence preference for the status quo; specifically, participants demonstrate greater preference for the status quo when past performance is strong compared to when it is weak, and when the number of available options is low compared to when it is high. The findings of this research improve our understanding of how contextual factors influence shifts in preference and the emergence of decision making biases; moreover, the current research demonstrates the need for future research to consider the influence of situational and contextual factors when investigating decision making in particular and human behaviour in general.

In the field of cognitive science, as well as the area of Artificial Intelligence (AI), the role of context has been investigated in many forms, and for many purposes. It is clear in both areas that consideration of contextual information is important. However, the significance of context has not been emphasized in the Bayesian networks literature. We suggest that consideration of context is necessary for acquiring knowledge about a situation and for refining current representational models that are potentially erroneous due to hidden independencies in the data.<p>In this thesis, we make several contributions towards the automation of contextual consideration by discovering useful contexts from probability distributions. We show how context-specific independencies in Bayesian networks and discovery algorithms, traditionally used for efficient probabilistic inference can contribute to the identification of contexts, and in turn can provide insight on otherwise puzzling situations. Also, consideration of context can help clarify otherwise counter intuitive puzzles, such as those that result in instances of Simpson's paradox. In the social sciences, the branch of attribution theory is context-sensitive. We suggest a method to distinguish between <i>dispositional causes</i> and <i>situational factors</i> by means of contextual models. Finally, we address the work of Cheng and Novick dealing with causal attribution by human adults. Their <i>probabilistic contrast model</i> makes use of contextual information, called focal sets, that must be determined by a human expert. We suggest a method for discovering complete <i>focal sets</i> from probabilistic distributions, without the human expert.

In an attempt to eradicate biases in substantive law and evidentiary procedures, legislative changes were implemented for sexual offences in 1983. Historically, biases in rape law had resulted in high attrition of cases at each stage of criminal justice processing, low conviction rates, and poor treatment of victims. The new legislation, which included the introduction of the offence 'sexual assault', was designed to emphasize the violent nature of sexual aggression rather than the sexual nature.<p> Law reform, however, is influenced by the response of the criminal justice personnel who must implement the new legislation. Judges are critical personnel within this framework because they both implement the reform in individual court cases and interpret the meaning of the new law. It is critical, therefore, to examine judicial understanding of the social, political, and economic meaning of the law, and more specifically, to examine their understanding of the nature of sexual violence.<p> Using a content analysis of 109 'remarks at sentencing', this study examines the impact of the 1983 reform on judicial definitions of sexual violence. The sentencing 'transcripts' are drawn from 66 sexual offence cases heard at the Court of Appeal for Saskatchewan between 1975-1988. Transcripts are analyzed for the absence or presence of references to each of 9 themes (violence, coercion, physical impact of the offence on the victim, psychological impact of the offence on the victim, breach of trust, the significance of penetration, the accused's criminal history, the role of alcohol or drug abuse, and the accused's control over his sexual drive). Each theme reflects an influential variable in judicial decision-making concerning sexual offences.<p> The results of the study indicated that since 1983,frequently and suggest that judges are attempting to reflect the 3 tier classification of sexual assault outlined in the new legislation. At the same time, however, judicial definitions of these variables continue to reflect stereotypes and myths associated with sexual violence. Judicial responses to sexual violence tend to minimize the culpability of sexual offenders and to minimize the seriousness of the offence. One of the most significant findings was that the 'sexual' element continues to dominate judicial definitions of sexual aggression rather than the 'violent' element. This emphasis implies that 'coercive' sexual acts have the same sexual character as 'consensual' sexual acts.<p> It appears, therefore, that the reform has been unsuccessful in meeting its objectives at the judicial level. However, the small change which has occurred may lay the groundwork for further change in the future.

The present thesis consists of three studies on the effects of group membership in large group decisions. The overall aim was to contribute to understanding how individuals react when decisions are made in large groups. We explored consequences of procedural justice concerns within such groups. In Study I we investigated how different decision procedures and issue importance affect perceptions of others who agree and disagree with the individual on a potentially important issue.  Individuals attributed more positive reasons for attitudes of those who agree as opposed to disagree with themselves, whereas disagreers were attributed more negative reasons. The asymmetry was moderated by decision form, and issue importance. The attitudes concerned attitudes towards potential new policies. In Study II we investigated differences in participants’ perceptions of others depending on own position towards the new policy. Challengers of the status quo advocating a change in the existing policy, were more biased when judging others than were defenders of the status quo. This suggests that challengers are less tolerant of defenders’ point of view. This effect was not affected by perceptions of minority status among the challengers. In Study III we looked at individual group members’ cognitive restructuring of a preferred decision alternative, and how it differs between decision conditions when the decision-maker is affiliated to own ingroup or not. Results showed that individuals restructure the attractiveness of their preferred alternative in group decisions similarly to what has been previously found in individual decision-making. The magnitude of restructuring was greatest when ingroup members decided for the group. However, this effect was moderated by identification with the ingroup, such that those who identified themselves with the ingroup restructured their preferred alternative more when ingroup members decided as opposed to when outgroup authorities decided. / <p>At the time of doctoral defense, the following paper was unpublished and had a status as follows: Paper 2: Submitted.</p>