Are the effects of Unreal violent video games pronounced when playing with a virtual reality system?

This study was conducted to analyze the short-term effects of violent electronic games, played with or without a virtual reality (VR) device, on the instigation of aggressive behavior. Physiological arousal (heart rate (HR)), priming of aggressive thoughts, and state hostility were also measured to test their possible mediation on the relationship between playing the violent game (VG) and aggression. The participants--148 undergraduate students--were randomly assigned to four treatment conditions: two groups played a violent computer game (Unreal Tournament), and the other two a non-violent game (Motocross Madness), half with a VR device and the remaining participants on the computer screen. In order to assess the game effects the following instruments were used: a BIOPAC System MP100 to measure HR, an Emotional Stroop task to analyze the priming of aggressive and fear thoughts, a self-report State Hostility Scale to measure hostility, and a competitive reaction-time task to assess aggressive behavior. The main results indicated that the violent computer game had effects on state hostility and aggression. Although no significant mediation effect could be detected, regression analyses showed an indirect effect of state hostility between playing a VG and aggression.     

Modulating effects in learned helplessness of dyadic dominance-submission relations

In this experiment, learned helplessness was studied from an ethological perspective by examining individual differences in social dominance and its influence on the effects of helplessness. Ninety animals were used, 30 randomly selected and 60 selected because of their clear dominance or submission. Each condition (dominant, submissive, and random) was distributed in three subgroups corresponding to the triadic design. The test consisted of an escape/avoidance task. The results showed that the animals in the uncontrollable condition performed worse than those in the controllable and no treatment conditions. Social submission and dominance reduced vulnerability of the subjects against learned helplessness. Submission had a facilitating effect on subsequent learning, independently of whether pretreatment was controllability or uncontrollability. Learned mastery was observed in the submissive condition, because submission benefited the subjects in the controllable condition in comparison with the untreated subjects, and dominance impaired the subjects in the controllable condition.     

Incorporating randomness in the Fisher information for improving item‐exposure control in CATs

The most commonly employed item selection rule in a computerized adaptive test (CAT) is that of selecting the item with the maximum Fisher information for the estimated trait level. This means a highly unbalanced distribution of item‐exposure rates, a high overlap rate among examinees and, for item bank management, strong pressure to replace items with a high discrimination parameter in the bank. An alternative for mitigating these problems involves, at the beginning of the test, basing item selection mainly on randomness. As the test progresses, the weight of information in the selection increases. In the present work we study, for two selection rules, the progressive methods ( Revuelta & Ponsoda, 1998 ) and the proportional method ( Segall, 2004a ), different functions that define the weight of the random component according to the position in the test of the item to be administered. The functions were tested in simulated item banks and in an operative bank. We found that both the progressive and the proportional methods tolerate a high weight of the random component with minimal or zero loss of accuracy, while bank security and maintenance are improved.     

Unless reasoning

We report the results of two experiments investigating conditional inferences from conditional unless assertions, such as Juan is not in León unless Nuria is in Madrid. Experiments 1 and 2 check Fillenbaum's hypothesis about the semantic similarity of unless with if not and only if assertions; both also examine inferential endorsements (Experiment 1) and endorsements and latencies (Experiment 2) of the four logically equivalent conditional formulations: if A then B, if not-B then not-A, A only if B and notA unless B. The results of these experiments show the similarity of unless and only if confirming that the representation of both conditionals from the outset probably include two possibilities directionally oriented from B to A; results also confirm the especial difficulty of unless assertions. The implications of the results are discussed in the context of recent psychological and linguistic theories of the meaning of unless.     

Materialism as a predictor variable of low income consumer behavior when entering into installment plan agreements

• This paper explores the influence of materialism on consumer indebtedness among low income individuals who live in poor regions of Sao Paulo. A materialism scale was adapted to this context and used to describe the level of materialism among the population surveyed. Results obtained relative to the relationship between materialism and socio‐demographic variables are compared to those of previous studies. A logistic regression model was developed in order to characterize individuals who have an installment plan payment booklet—the main source of consumer credit for the population studied—and to differentiate them from those who do not, based on the materialism level, socio‐demographic variables and purchasing and consumer habits. The proposed model confirms materialism as a behavioral variable that is useful for forecasting the probability of an individual getting into debt in order to consume. Income had the biggest relative influence on the regression model, followed by materialism and age, controlled by gender.

Copyright © 2008 John Wiley & Sons, Ltd.     

Dream actors in the theatre of memory: Their role in the psychoanalytic process2

The author notes that neuropsychological research has discovered the existence of two long‐term memory systems, namely declarative or explicit memory, which is conscious and autobiographical, and non‐declarative or implicit memory, which is neither conscious nor verbalisable. It is suggested that pre‐verbal and pre‐symbolic experience in the child's primary relations is stored in implicit memory, where it constitutes an unconscious nucleus of the self which is not repressed and which influences the person's affective, emotional, cognitive and sexual life even as an adult. In the analytic relationship this unconscious part can emerge essentially through certain modes of communication (tone of voice, rhythm and prosody of the voice, and structure and tempo of speech), which could be called the ‘musical dimension’ of the transference, and through dream representations. Besides work on the transference, the critical component of the therapeutic action of psychoanalysis is stated to consist in work on dreams as pictographic and symbolic representations of implicit pre‐symbolic and pre‐verbal experiences. A case history is presented in which dream interpretation allowed some of a patient's early unconscious, non‐repressed experiences to be emotionally reconstructed and made thinkable even though they were not actually remembered.     

Human values and social identities: A study in two collectivist cultures

The current study examines the value correlates of social identities (identification with in‐groups and geospatial units) in two collectivist cultures (Brazil, n = 471; Spain, n = 476). According to previous research, it was expected that subjects who score higher on social values would be more identified with the various traditional in‐groups and with the local geospatial units and that social identities would be predicted by different values among Brazilians and Spaniards. Subjects were undergraduate students (228 males; 719 females), with age ranging from 16 to 55 years (M = 21.9; SD = 4.57), from three states in Brazil (Paraíba, Distrito Federal, and São Paulo) and Spain (Pontevedra, Madrid, and Barcelona). They were administered the Individualism‐CollectivismQuestionnaire, the Basic Value Survey, the In‐group Identification Scale, the Geospatial Identification Scale, and a questionnaire with demographic questions (e.g., gender, age, religious affiliation). Results confirm that importance attributed to social values is correlated with traditional in‐group and local geospatial identification, and that values predicting social identities are different across cultures, especially in the case of values related to geospatial identification. Specifically, among the set of social human values, belonging and tradition were most important to explain social identities. Subjects that assigned more importance to privacy were less identified with traditional ingroups, independently of their national culture. Geospatial identification was based on the values religiosity and belonging for Brazilians, and tradition, social order, honesty, and power for Spaniards. In general, these findings corroborate previous ones, suggesting the existence of a common set of values to explain social identity, based on principally normative values (social order and tradition). Moreover, they indicate the specificity and complexity of the geospatial identification in Spain, where the values of honesty and power contribute to explaining it. In this country, it is possible that the determinants of geospatial identification surpass the social orientation endorsed by people.     

University students' achievement goals and approaches to learning in mathematics

Background Achievement goals (AG) and students' approaches to learning (SAL) are two research perspectives on student motivation and learning in higher education that have until now been pursued quite independently. Aims This study sets out: (a) to explore the relationship between the most representative variables of SAL and AG; (b) to identify subgroups (clusters) of students with multiple AG; and (c) to examine the differences between these clusters with respect to various SAL and AG characteristics. Sample The participants were 680 male and female 1st year university students studying different subjects (e.g. mathematics, physics, economics) but all enrolled on mathematics courses (e.g. algebra, calculus). Method Participants completed a series of questionnaires that measured their conceptions of mathematics, approaches to learning, course experience, personal 2 × 2 AG, and perceived AG. Results SAL and AG variables were moderately associated and related to both the way students perceived their academic environment and the way they conceived of the nature of mathematics (i.e. the perceptual‐cognitive framework). Four clusters of students with distinctive multiple AG were identified and when the differences between clusters were analysed, we were able to attribute them to various constructs including perceptual‐cognitive framework, learning approaches, and academic performance. Conclusio This study reveals a consistent pattern of relationships between SAL and AG perspectives across different methods of analysis, supports the relevance of the 2 × 2 AG framework in a mathematics learning context and suggests that AG and SAL may be intertwined aspects of students' experience of learning mathematics at university.     

Male–male combats in a polymorphic lizard: residency and size,but not color,affect fighting rules and contest outcome

Theoretical models predict that the outcome of dyadic agonistic encounters between males is influenced by resource‐holding potential, resource value, and intrinsic aggressiveness of contestants. Moreover, in territorial disputes residents enjoy a further obvious competitive advantage from the residency itself, owing to the intimate familiarity with their territory. Costs of physical combats are, however, dramatically high in many instances. Thus, signals reliably reflecting fighting ability of the opponents could easily evolve in order to reduce these costs. For example, variation in color morph in polymorphic species has been associated with dominance in several case studies. In this study, we staged asymmetric resident‐intruder encounters in males of the common wall lizard Podarcis muralis, a species showing three discrete morphs (white, yellow, and red) to investigate the effects of asymmetries in color morph, residency, and size between contestants on the outcome of territorial contests. We collected aggression data by presenting each resident male with three intruders of different color morph, in three consecutive tests conducted in different days, and videotaping their interactions. The results showed that simple rules such as residency and body size differences could determine the outcome of agonistic interactions: residents were more aggressive than intruders, and larger males were competitively superior to smaller males. However, we did not find any effect of color on male aggression or fighting success, suggesting that color polymorphism in this species is not a signal of status or fighting ability in intermale conflicts. Aggr. Behav. 35:274–283, 2009. © 2009 Wiley‐Liss, Inc.