Memorization and recall of very long lists accounted for within the Long-Term Working Memory framework

In a recent paper, Hu, Ericsson, Yang, and Lu (2009) found that an ability to memorize very long lists of digits is not mediated by the same mechanisms as exceptional memory for rapidly presented lists, which has been the traditional focus of laboratory research. Chao Lu is the holder of the Guinness World Record for reciting the most decimal positions of pi, yet he lacks an exceptional memory span for digits. In the first part of this paper we analyzed the reliability and structure of his reported encodings for lists of 300 digits and his application of the story mnemonic. Next, his study and recall times for lists of digits were analyzed to test hypotheses about his detailed encoding processes, and cued-recall performance was used to assess the structure of his encodings. Three experiments were then designed to interfere with the uniqueness of Chao Lu's story encodings, and evidence was found for his remarkable ability to adapt his encoding processes to reduce the interference. Finally, we show how his skills for encoding and recalling long lists can be accounted for within the theoretical framework of Ericsson and Kintsch's (1995) Long-Term Working Memory.     

The role of intuition and deliberative thinking in experts' superior tactical decision-making

Current theories argue that human decision making is largely based on quick, automatic, and intuitive processes that are occasionally supplemented by slow controlled deliberation. Researchers, therefore, predominantly studied the heuristics of the automatic system in everyday decision making. Our study examines the role of slow deliberation for experts who exhibit superior decision-making outcomes in tactical chess problems with clear best moves. Our study uses advanced computer software to measure the objective value of actions preferred at the start versus the conclusion of decision making. It finds that both experts and less skilled individuals benefit significantly from extra deliberation regardless of whether the problem is easy or difficult. Our findings have important implications for the role of training for increasing decision making accuracy in many domains of expertise.     

Prevalence and effects of life event exposure among undergraduate and community college students

The purposes of this study were to assess lifetime and recent exposure to various life events among undergraduate and community college students and to assess the relation between event exposure and a broad range of outcomes (i.e., mental and physical health, life satisfaction, grade point average). Undergraduate students from a midwestern university (N = 842) and a community college (N = 242) completed online measures of lifetime event exposure and outcomes at Time 1 and recent event exposure at Time 2 two months later. Life events assessed included events that did and did not meet the definition of a traumatic event (i.e., posttraumatic stress disorder Criterion A1) in the Diagnostic and Statistical Manual of Mental Disorders (4th ed., text rev.; DSM-IV-TR; American Psychiatric Association, 2000) as well as directly (e.g., own life-threatening illness) and indirectly (e.g., others' illness) experienced events. Students reported experiencing many lifetime and recent Criterion A1 and non-A1 events, and community college students reported more events than did university students. Generally, individuals who reported more lifetime events also reported poorer outcomes (e.g., poorer health). The number of non-Criterion A1 and directly experienced events tended to be more strongly correlated with negative outcomes than were the number of Criterion A1 and indirectly experienced events reported. These findings suggest that non-A1 events are important to assess and can be significantly related to outcomes for students.     

Improved Regression Calibration

The likelihood for generalized linear models with covariate measurement error cannot in general be expressed in closed form, which makes maximum likelihood estimation taxing. A popular alternative is regression calibration which is computationally efficient at the cost of inconsistent estimation. We propose an improved regression calibration approach, a general pseudo maximum likelihood estimation method based on a conveniently decomposed form of the likelihood. It is both consistent and computationally efficient, and produces point estimates and estimated standard errors which are practically identical to those obtained by maximum likelihood. Simulations suggest that improved regression calibration, which is easy to implement in standard software, works well in a range of situations.     

Emotional responses in spider fear are closely related to picture awareness

Theories of emotion propose that responses to emotional pictures can occur independently of whether or not people are aware of the picture content. Because evidence from dissociation paradigms is inconclusive, we manipulated picture awareness gradually and studied whether emotional responses varied with degree of awareness. Spider fearful and non-fearful participants viewed pictures of spiders and flowers at four levels of backward masking while electrodermal activity and heart rate were measured continuously. Recognition ratings confirmed that participants' picture awareness decreased with masking. Critically, effects of spider fear on emotion ratings and heart rate also decreased with masking. These findings suggest that effects of spider fear on emotion ratings and heart rate are closely related to picture awareness.     

Filial Obligations: A Contextual, Pluralist Model

In this article I investigate the nature and extent of filial obligations. The question what (adult) children owe their parents is not only philosophically interesting, but also of increasing relevance in ageing societies. Its answer matters to elderly people and their adult children, and is relevant to social policy issues in various ways. I present the strongest arguments for and against three models of filial obligations: the ??past parental sacrifices?? model, the ??special relationship?? model, and the conventionalist model. There is something to be said??and after consideration of objections something remains to be said??for all three models. In other words: filial obligations have more than one source, and an adequate model of filial obligations should reflect this. On its own, each of the above models is one-sided. They also fail to show the connections between the question of filial obligations and various other issues, such as issues of gender justice, the extent of institutionalization of eldercare, and social conventions regarding filial responsibility. Therefore, I integrate what I think we should keep from the aforementioned models into a contextual, pluralist model, which places filial obligations in a broader social and cultural context and relates them to issues of social justice. The model also highlights the difference between general and specific filial obligations, and the factors that determine their nature and extent, thus enabling a deeper and more comprehensive understanding of filial obligations.     

Eliciting cues to deception and truth: What matters are the questions asked

In this paper we argue that there is little need for more of the traditional deception detection research in which observers assess short video clips in which there are few (if any) cues to deception and truth. We argue that a change in direction is needed and that researchers should focus on the questions the interviewer needs to ask in order to elicit and enhance cues to deception. We discuss three strands of research into this new ‘interviewing to detect deception’ approach. We encourage practitioners to use the proposed techniques and encourage other researchers to join us in conducting more research in this area. We offer some guidelines for what researchers need to keep in mind when carrying out research in this new paradigm.     

Personality,Personal Values and Growth in Military Special Unit Patrol Teams Operating in a Polar Environment

This longitudinal study assessed personality traits, personal values and personal growth of six two-man Danish military Sirius Patrol teams. The NEO Personality Inventory-Revised (NEO PI-R) findings indicated a psychologically adapted group, consistent with the elevation on the Triarchic Psychopathy Measure (TriPM) Boldness factor. Self-direction, Universalism, and Stimulation were the highest rated and stable values on the Portrait Values Questionnaire (PVQ); the Power value showed a significant linear increase over time. The Posttraumatic Growth Inventory (PTGI) findings indicated perceptions of considerable growth through participating in the Sirius Patrol. Assessment of the combination of personality traits and value hierarchies of other military groups in relation to types of operations engaged in is considered.     

Outcome-Desirability Bias in Resource Management Problems

Sequences of numbers representing prior resource size were presented to participants in a common-pool resource dilemma. The numbers were sampled from uniform probability distributions with either a low variance (low resource uncertainty) or a high variance (high resource uncertainty). Presentations were both sequential and simultaneous. Three groups of 16 undergraduates either estimated the size of the resource when it did not represent value to them; requested an amount from the resource, identified with a sum of money, when the outcome of the requests only depended on resource size; or requested from the resource (sum of money) when the outcome of the requests depended on both resource size and how much others in a group requested. In support of an individual outcome-desirability bias due to selective recall of the number sequences, after sequential presentation larger requests were observed when resource uncertainty was high than when it was low. No effects of resource uncertainty or presentation were found on the estimates of resource size. Whether or not the outcome of the requests depended on others' requests made little difference.     

Bullying at work: Epidemiological findings in public and private organizations

Abstract

The aim of the study was to investigate the prevalence of bullying and harassment at work, to identify risk groups and risk organizations, and to investigate who the victims report to be their tormentors. Bullying and harassment are defined as situations where a worker or a supervisor is systematically mistreated and victimized by fellow workers or supervisors through repeated negative acts. However, to be a victim of such bullying one must also feel inferiority in defending oneself in the actual situation. Data from 14 different Norwegian surveys (N = 7986) are presented, encompassing a broad array of organizations and professions. The results show that bullying and harassment at work are widespread problems in Norwegian working life. As many as 8.6% of the respondents had been bullied at work during the previous six months. Organizations with many employees, male-dominated organizations, and industrial organizations had the highest prevalence of victimization. Older workers had a higher risk of victimization than younger workers. Even if men and women do not differ in prevalence of bullying, significantly more men were reported as bullies. Victims reported superiors as bullies as often as they reported colleagues as their tormentor(s).