Influence analysis for the factor analysis model with ranking data

Influence analysis is an important component of data analysis, and the local influence approach has been widely applied to many statistical models to identify influential observations and assess minor model perturbations since the pioneering work of Cook (1986) . The approach is often adopted to develop influence analysis procedures for factor analysis models with ranking data. However, as this well‐known approach is based on the observed data likelihood, which involves multidimensional integrals, directly applying it to develop influence analysis procedures for the factor analysis models with ranking data is difficult. To address this difficulty, a Monte Carlo expectation and maximization algorithm (MCEM) is used to obtain the maximum‐likelihood estimate of the model parameters, and measures for influence analysis on the basis of the conditional expectation of the complete data log likelihood at the E‐step of the MCEM algorithm are then obtained. Very little additional computation is needed to compute the influence measures, because it is possible to make use of the by‐products of the estimation procedure. Influence measures that are based on several typical perturbation schemes are discussed in detail, and the proposed method is illustrated with two real examples and an artificial example.     

Escape performance after inescapable shock in selectively bred lines of mice: response maintenance and catecholamine activity.

The effects of inescapable shock on subsequent escape performance and shock-elicited activity were examined in six lines of mice selectively bred for differences in general locomotor activity. The line differences in locomotor activity were found to be unrelated to the differences observed on shock-elicited activity. However, escape performance following exposure to inescapable shock was predictable from the levels of shock-elicited activity. Those lines that displayed the greatest decline in motor activity during shock likewise displayed the most pronounced escape deficits. The line differences in escape performance induced by inescapable shock could be mimicked by treatment with a tyrosine hydroxylase inhibitor, alpha-methyl-p-tyrosine. As predicted, the lines that displayed the least interference after tyrosine hydroxylase inhibition exhibited the smallest reduction in levels of catecholamines. The effects on escape performance following inescapable shock are interpreted in terms of the role of response maintenance deficits produced by catecholamine depletion.     

The signing brain: the neurobiology of sign language

Most of our knowledge about the neurobiological bases of language comes from studies of spoken languages. By studying signed languages, we can determine whether what we have learnt so far is characteristic of language per se or whether it is specific to languages that are spoken and heard. Overwhelmingly, lesion and neuroimaging studies indicate that the neural systems supporting signed and spoken language are very similar: both involve a predominantly left-lateralised perisylvian network. Recent studies have also highlighted processing differences between languages in these different modalities. These studies provide rich insights into language and communication processes in deaf and hearing people.     

Representations of the self in the near and distant future

Seven studies provide evidence that representations of the self at a distant-future time point are more abstract and structured than are representations of the self at a near-future time point and that distant-future behaviors are more strongly related to general self-conceptions. Distant-future self-representations incorporate broader, more superordinate identities than do near-future self-representations (Study 1) and are characterized by less complexity (Study 2), more cross-situational consistency (Study 3), and a greater degree of schematicity (Study 4). Furthermore, people's behavioral predictions of their distant-future (vs. near-future) behavior are more strongly related to their general self-characteristics (Study 5), distant-future behaviors are seen as more self-expressive (Study 6), and distant-future behaviors that do not match up with acknowledged self-characteristics are more strongly rejected as reflections of the self (Study 7). Implications for understanding both the nature of the self-concept and the way in which distance may influence a range of self-processes are discussed.     

Suicidal Adolescents' Social Support from Family and Peers: Gender-Specific Associations with Psychopathology

Perceptions of social support from family, non-family adults, and peers were examined in relation to the psychopathology reported by 220 suicidal adolescents (152 females) during a psychiatric hospitalization. Results of regression analyses showed that, among females, family support was negatively related to hopelessness, depressive symptoms, and suicidal ideation. Among males, peer support was positively associated with depressive symptoms and suicidal ideation. Across gender, more peer support was associated with more externalizing behavior problems; whereas, family support was negatively related to these problems and to alcohol/substance abuse. Paralleling normative findings, age was positively associated with peer support, and females perceived more peer support than did males. Findings extend previous research on social support to suicidal adolescents, and broaden the literature by examining extrafamilial support and a broader range of relevant psychopathology. That is, perceived social support relates to psychiatric impairment differentially by gender, and normative, age-related variations in perceptions of social support are detected even among highly impaired adolescents. Clinical implications and directions for future research are discussed.     

Personality, biographical characteristics, and job interview success: a longitudinal study of the mediating effects of interviewing self-efficacy and the moderating effects of internal locus of causality

In this study, the authors developed and tested a model of performance in job interviews that examines the mediating role of interviewing self-efficacy (I-SE; job applicants' beliefs about their interviewing capabilities) in linking personality and biographical background with interview success and the moderating role of locus of causality attributions in influencing the relationship between interview success and subsequent I-SE. The authors tested their model (over 5 months' duration) with matched data from 229 graduating seniors, firms, and university records. Hierarchical regression analyses demonstrated I-SE mediated the effects of Extraversion, Conscientiousness, and leadership experience on interview success. Locus of causality attributions for interview outcomes moderated the relationship between interview success and subsequent I-SE. Theoretical and practical implications are discussed.     

Psychologists in Academic Health Settings: Key Contributors to Dynamic Interplay Among Research, Clinical Practice, and Policy Domains

Psychologists in academic health systems are in a unique position to impact the dynamic interplay among research, clinical practice, and policy domains. In addition to their specialty expertise in psychopathology, particular types of physical illness and disease, and health promotion, psychologists have substantial knowledge of human behavior, refined scientific skills, knowledge and experience in the effective delivery of clinical services, strengths in written expression, and a collaborative orientation. This combination of strengths makes psychologists extremely well-suited for (a) interdisciplinary efforts to develop and implement evidence-based assessment and intervention strategies with biological, psychological, behavioral, and social components, and (b) leadership and advocacy efforts that impact the quality and availability of health care services.     

the relationship between pain and coping styles among hiv-positive men and women

Abstract

Pain in HIV/AIDS patients is associated with compromised quality of life and emotional adjustment. Although previous findings support a relationship between coping styles and subjective pain for various groups of chronically-ill persons, little research has examined the associations between coping and pain in HIV-positive or AIDS patients. The purpose of this study was to explore the relationship between pain and coping styles among 105 HIV-positive participants (32 women and 73 men) in a randomized clinical trial designed to examine the effect of group psychotherapy on quality of life and health behavior. Participants completed the Brief COPE, the pain scale from the Medical Outcomes Study-HIV, and a demographic and medical questionnaire. Multiple regression analysis, with pain as the dependent variable, showed that participants who reported coping through denial reported greater pain severity (p < 0.0001). These results suggest that denial as a coping strategy appears to be signficantly associated with pain for persons with HIV/AIDS. However, further research is necessary to determine the causal relationship between pain and coping through denial. These findings also point to the possibility of psychological intervention in order to modify maladaptive coping styles and to ameliorate pain in this population.     

Thinking styles,self‐esteem,and extracurricular experiences

This study had two objectives. The first was to examine the relationship between thinking styles and self‐esteem. The second objective was to investigate the relationship of the participants' extracurricular experiences to both thinking styles and self‐esteem. Seven‐hundred and ninety‐four university students from Hong Kong participated in the study. Participants responded to the Thinking Styles Inventory (Sternberg & Wagner, 1992) and the Self‐Esteem Inventory (Adult Form, Coopersmith, 1981) as well as to a questionnaire designed to elicit both personal and situational characteristics. It was found that thinking styles and self‐esteem are statistically related. Meanwhile, both thinking styles and self‐esteem are statistically related to the participants' extracurricular experiences. Implications of these findings for teachers are discussed.