Resisting Everything Except Temptation: Evidence and an Explanation for Domain‐specific Impulsivity

We propose a model of impulsivity that predicts both domain‐general and domain‐specific variance in behaviours that produce short‐term gratification at the expense of long‐term goals and standards. Specifically, we posit that domain‐general impulsivity is explained by domain‐general self‐control strategies and resources, whereas domain‐specific impulsivity is explained by how tempting individuals find various impulsive behaviours, and to a lesser extent, in perceptions of their long‐term harm. Using a novel self‐report measure, factor analyses produced six (non‐exhaustive) domains of impulsive behaviour (Studies 1–2): work, interpersonal relationships, drugs, food, exercise and finances. Domain‐general self‐control explained 40% of the variance in domain‐general impulsive behaviour between individuals, r_effect = .71. Domain‐specific temptation (r_effect = .83) and perceived harm (r_effect = ?.26) explained 40% and 2% of the unique within‐individual variance in impulsive behaviour, respectively (59% together). In Study 3, we recruited individuals in special interest groups (e.g. procrastinators) to confirm that individuals who are especially tempted by behaviours in their target domain are not likely to be more tempted in non‐target domains. Copyright © 2011 John Wiley & Sons, Ltd.     

Cyber victimization and adolescent self‐esteem: The role of communication with parents

Internet use has increased rapidly in recent years, and has inevitably led to some negative outcomes, notably cyber bullying and cyber victimization. The purpose of this study was to examine the effects of cyber victimization and parent–adolescent communication on self‐esteem, and the moderating role of parent–adolescent communication in the relationship between cyber victimization and self‐esteem among Turkish adolescents. The participants were 337 adolescents with a mean age of 16.37, (SD = 0.89). The results of hierarchical regression analysis reveal that self‐esteem was predicted negatively by cyber victimization, but positively by mother–adolescent communication. Results also indicate the moderating roles of parent–adolescent communication in the links between cyber victimization and self‐esteem. The findings indicate a need to consider the parent–adolescent relationship while working with victimized youth, and the implications for research and practice are discussed.     

Domain Knowledge and Hindsight Bias among Poker Players

Hindsight bias occurs when individuals believe that events were more predictable after they have occurred than they actually were before they occurred. Although hindsight bias is a well‐studied phenomenon, few studies have examined the role of expertise in this bias. Two experiments investigated the relation between the magnitude of hindsight bias and self‐reported poker expertise (Experiment 1) and assessed poker knowledge (Experiment 2). In Experiment 1, self‐rated poker expertise was negatively correlated with hindsight bias. Experiment 2 employed memory and hypothetical hindsight conditions and found that poker knowledge was negatively correlated with hindsight bias in the memory condition, but unrelated to hindsight bias in the hypothetical condition. These results help elucidate the role of expertise in hindsight bias and provide additional support for the separate components view, which claims there are different forms of hindsight bias that are differentially affected by certain factors. Domain knowledge appears to be one of such factors. Copyright © 2013 John Wiley & Sons, Ltd.     

Tunability of vortex-like patterns on 180o domain walls in ferroelectric PbTiO3

ABSTRACT

Vortices and antivortices are topological defects that could be exploited in high-density storage devices. Using first-principles calculations, we found vortex-like patterns around charged domain walls that are closely related to the tilt angles of charged 180° domain walls relative to the [100] direction. With decreasing tilt angle, the vortex-like patterns evolve from independent antivortices to vortex-antivortex pairs, and then to the inexistence of vortex or antivortex defects. These findings might promote to understand the atomic scale structures of 180° domain walls and open a new pathway to manipulating vortex structures to obtain novel properties.     

Children's Causal Explanations of Psychogenic Bodily Reactions

In Experiment 1, 4‐, 5‐, 8‐ and 11‐year‐old Japanese children (n = 69) and adults (n = 21) explained their reasons for bodily induced reactions (e.g. overeating leads to vomiting) and psychogenic bodily reactions (bodily outcomes originating in the mind, e.g. frustration leads to vomiting). Children gave vitalistic explanations, that is, explaining causal connections by referring to a vital force, in responses concerning bodily induced reactions, whereas adults typically gave these explanations in responses concerning psychogenic bodily reactions. In Experiment 2, 5‐, 8‐ and 11‐year‐old children (n = 96) and adults (n = 24) explained bodily induced and psychogenic bodily reactions, and psychological behaviour, for example, that frustration leads to nail biting. As in Experiment 1, vitalistic explanations tended to be found for psychogenic tasks but were seldom found in either children's or adults' explanations of psychological behaviour. The findings suggest that with age vitalistic causality obtains cross mind‐body implications. Copyright © 2013 John Wiley & Sons, Ltd.     

Operating on Functions with Variable Domains

The sum, difference, product and quotient of two functions with different domains are usually defined only on their common domain. This paper extends these definitions so that the sum and other operations are essentially defined anywhere that at least one of the components is defined. This idea is applied to propositions and events, expressed as indicator functions, to define conditional propositions and conditional events as three-valued indicator functions that are undefined when their condition is false. Extended operations of and, or, not and conditioning are then defined on these conditional events with variable conditions. The probabilities of the disjunction (or) and of the conjunction (and) of two conditionals are expressed in terms of the conditional probabilities of the component conditionals. In a special case, these are shown to be weighted averages of the component conditional probabilities where the weights are the relative probabilities of the various conditions. Next, conditional random variables are defined to be random variables X whose domain has been restricted by a condition on a second random variable Y. The extended sum, difference, product and conditioning operations on functions are then applied to these conditional random variables. The expectation of a random variable and the conditional expectation of a conditional random variable are recounted. Theorem 1 generalizes the standard result that the conditional expectation of the sum of two conditional random variables with disjoint and exhaustive conditions is a weighted sum of the conditional expectations of the component conditional random variables. Because of the extended operations, the theorem is true for arbitrary conditions. Theorem 2 gives a formula for the expectation of the product of two conditional random variables. After the definition of independence of two random variables is extended to accommodate the extended operations, it is applied to the formula of Theorem 2 to simplify the expectation of a product of conditional random variables. Two examples end the paper. The first concerns a work force of n workers of different output levels and work shifts. The second example involves two radars with overlapping surveillance regions and different detection error rates. One radar's error rate is assumed to be sensitive to fog and the other radar's error rate is assumed to be sensitive to air traffic density. The combined error rate over the combined surveillance region given heavy fog and moderate air traffic is computed.     

A Systematic Framework for Integrating Psychological Evaluations and Interventions

A systematic framework for an integrative approach to psychological evaluations and interventions is proposed based on the executive system model of intelligence, the transactional processes of stress and coping, and the field properties of the personal domain. The executive system of intelligence is a comprehensive model that helps to explain the active components of various types of psychotherapies. We are proposing that psychotherapies facilitate clients' uses of their executive functions to develop coping strategies in their transactions with the environment and the events in their life space. A clinical case is presented to illustrate our systematic approach to psychological evaluation and intervention.     

父母教养方式与初中生网络受欺负行为的关系:一项追踪研究

以491名初中生为研究对象,对其网络受欺负行为进行为期2年的4次追踪测试,同时测试其父母教养方式。采用潜变量混合增长模型探讨初中生网络受欺负行为的多种发展轨迹,并分析父母教养方式的影响。结果发现：（1）在2年时间内,初中生网络受欺负行为呈显著下降趋势;（2）初中生网络受欺负行为存在两种下降趋势,即快速下降与慢速下降;（3）父亲拒绝、父亲过度保护与母亲拒绝这三种教养方式可增加两组初中生的网络受欺负行为,同时也可降低其网络受欺负行为的下降速度;（4）父亲情感温暖可显著预测快速下降组的初始水平和发展速度,母亲过度保护可显著预测慢速下降组的初始水平和发展速度,母亲情感温暖可显著负向预测慢速下降组的发展速度。上述结果证实父母教养方式对初中生网络受欺负行为发展轨迹的预测作用,支持了Kowalski网络欺负模型。     

Testing for Granger Causality in the Frequency Domain: A Phase Resampling Method

This article introduces phase resampling, an existing but rarely used surrogate data method for making statistical inferences of Granger causality in frequency domain time series analysis. Granger causality testing is essential for establishing causal relations among variables in multivariate dynamic processes. However, testing for Granger causality in the frequency domain is challenging due to the nonlinear relation between frequency domain measures (e.g., partial directed coherence, generalized partial directed coherence) and time domain data. Through a simulation study, we demonstrate that phase resampling is a general and robust method for making statistical inferences even with short time series. With Gaussian data, phase resampling yields satisfactory type I and type II error rates in all but one condition we examine: when a small effect size is combined with an insufficient number of data points. Violations of normality lead to slightly higher error rates but are mostly within acceptable ranges. We illustrate the utility of phase resampling with two empirical examples involving multivariate electroencephalography (EEG) and skin conductance data.