Of virtual victims and victimized virtues: differential effects of experienced aggression in video games on social cooperation

Two experimental studies were used to investigate how interacting with aggressive virtual characters in video games affects trust and cooperation of players. Study 1 demonstrates that experiencing virtual aggression from a victim's perspective can impair players' investments in a subsequent common goods dilemma situation. This effect is mediated by reduced expectations of trust in the cooperativeness of interaction partners. In Study 2 the same effect was replicated by using a different cooperation task and by investigating the moderating role of justice sensitivity from a victim's perspective as a dispositional factor. Participants transferred less money to an unknown partner in a trust game after exposure to aggressive nonplayer characters in a video game. This effect was stronger for people high in victim sensitivity. Results of both studies can be interpreted in line with the sensitivity to mean intentions model and add to the body of research on violent media effects.     

Increased spatial salience in the social Simon task: A response-coding account of spatial compatibility effects

A spatial compatibility effect (SCE) is typically observed in forced two-choice tasks in which a spatially defined response (e.g., pressing a left vs. a right key) has to be executed to a nonspatial feature of a stimulus (e.g., discriminating red from green) that is additionally connoted by a spatial feature (e.g., the stimulus points to the left or the right). Responses are faster and more accurate when the response side and the spatial stimulus feature are compatible than when they are incompatible. Previous research has demonstrated that SCEs are diminished when stimuli from only one response category are responded to in individual go/no-go tasks, whereas SCEs reemerge when two participants work jointly on two complementary, individual go/no-go tasks in a joint go/no-go task setting. This social Simon effect has been considered evidence for shared task representations. We show that SCEs emerge in individual go/no-go tasks when the spatial dimension is made more salient, whereas SCEs are eliminated in joint go/no-go tasks when the spatial dimension is made less salient. These findings are consistent with an account of social Simon effects in terms of spatial response coding, whereas they are inconsistent with an account of shared task representations. The relevance of social factors for spatial response coding is discussed.     

Practical Arguments for Theoretical Theses

Pascals wager is expounded as a paradigm case of a practical,decision-theoretical argument for acting as if a proposition is true when wehave no theoretical reasons to accept or reject it (1.1.–1.2.). Thoughthe paradigm is fallacious in various respects there are valid and adequatearguments for acting as if certain propositions are true: that theoreticalentities exist, that there are material perceptual objects, that the worldis uniform across time (1.3). After this analysis of examples the authorsgeneral approach for developing criteria for the validity and adequacy oftypes of argument (2.1.) is applied: Having discussed some problems(2.2.–2.3.), a general epistemic principle for such pascal argumentsis developed, which characterizes their premisses and, if introduced as anadditional premiss, can make them deductively valid (2.4).     

Exact and best confidence intervals for the ability parameter of the Rasch model

A commonly used method to evaluate the accuracy of a measurement is to provide a confidence interval that contains the parameter of interest with a given high probability. Smallest exact confidence intervals for the ability parameter of the Rasch model are derived and compared to the traditional, asymptotically valid intervals based on the Fisher information. Tables of the exact confidence intervals, termed Clopper-Pearson intervals, can be routinely drawn up by applying a computer program designed by and obtainable from the author. These tables are particularly useful for tests of only moderate lengths where the asymptotic method does not provide valid confidence intervals.     

WHAT IT FEELS LIKE TO BE IN A SUPERPOSITION. AND WHY

This paper attempts an interpretation of Everett's relative state formulation of quantum mechanics that avoids the commitment to new metaphysical entities like worlds or minds. Starting from Everett's quantum mechanical model of an observer, it is argued that an observer's belief to be in an eigenstate of the measurement (corresponding to the observation of a well-defined measurement outcome) is consistent with the fact that she objectively is in a superposition of such states. Subjective states corresponding to such beliefs are constructed. From an analysis of these subjective states and their dynamics it is argued that Everett's pure wave mechanics is subjectively consistent with von Neumann's classical formulation of quantum mechanics. It follows from the argument that the objective state of a system is in principle unobservable. Nevertheless, an adequate concept of empirical reality can be constructed.     

A multinomial modeling approach to dissociate different components of the truth effect

The subjective impression that statements are true increases when statements are presented repeatedly. There are two sources for this truth effect: An increase in validity based on recollection (a controlled process) and increase in processing fluency due to repeated exposure (an automatic process). Using multinomial processing trees (MPT), we present a comprehensive model of the truth effect. Furthermore, we show that whilst the increase in processing fluency is indeed automatic, the interpretation and use of that experience is not. Experiment 1 demonstrates the standard use of the fluency experience and Experiment 2 demonstrates that people can change the interpretation of the experience according to its ecological validity. By implication, the truth effect represents the adaptive usage of feedback received from internal processes.     

Reduced Sense of Coherence Due to Neuroticism: Are Transcendent Beliefs Protective Among Catholic Pastoral Workers?

In this study, we examined a third variable effect on the relationship of personality traits, especially neuroticism and the salutogenetic concept sense of coherence. Specifically, we were interested in the moderating role of religious trust (RT) and transcendence perception operationalized as daily spiritual experiences (DSE) on the aforementioned relationship among religious individuals. We applied a cross-sectional study among a sample of 8594 pastoral workers using standardized questionnaires. Multiple regression and moderator analysis displayed the relationships between big five personality variables and sense of coherence. Neuroticism was identified as a negative predictor to sense of coherence, indicating impairment on this psychological resource. RT and DSE appear to function as moderators that buffer the negative effects of neuroticism on sense of coherence among religious persons. This is an interesting finding because people with expressions of neurotic personality tendencies often struggle to find helpful methods of coping and may find a helpful resource in the concepts studied here.     

Testing the Mental Model Theory of Propositional Reasoning

Johnson-Laird, Byrne, and Schaeken (1992) present a theory of propositional reasoning by mental models. The present study provides a comprehensive test of the predictions of that theory for the difficulty of simple disjunctive and conditional inferences. The results are largely consistent with the complex pattern of predictions. They are discussed in the light of recently proposed modifications of the original theory.     

On the stability of instability: Optimising the reliability of intra-subject variability of reaction times

While reaction times have been traditionally aggregated using measures of central tendency, interest in higher moments of the reaction time distribution, particularly intra-subject variability (ISV), has grown in recent years. However it is unclear to what extent individual differences in these higher moments are stable across time, reflecting trait-like features. The present study compares the reliability of a number of metrics for higher moments of the reaction time distribution on a battery of speeded tasks, and supplements these analyses with a Monte Carlo analysis of the go no-go task. The reliability of ISV is shown to be dependent on both the metric used and the number of trials used to calculate them. However, when using sufficient trials and appropriate metrics, ISV shows good test-retest and odd-even reliability. This study has important practical implications for the design and analysis of studies into ISV, as well as theoretical importance for the trait concept of ISV.