Cue competition effects in the planarian

The learning abilities of planarian worms (Dugesia tigrina) were assessed by using a number of Pavlovian conditioning paradigms. Experiment 1 showed that planaria were susceptible to basic conditioning in that they readily developed a conditioned response to a change in ambient luminance when it was consistently paired with an electric shock over a number of trials. In Experiment 2, the change in luminance was presented in a compound with a vibration stimulus during conditioning. Subsequent tests revealed poor conditioning of the elements compared with control groups in which the animals were conditioned in the presence of the elements alone, an instance of overshadowing. In Experiment 3, pre-training of one of the elements before compound conditioning resulted in blocking of learning about the other element. These results add to other studies that have reported cue competition effects in animal species belonging to different phyla (chordate, mollusk, arthropod), suggesting that learning in these phyla could be ruled by similar principles. The results are discussed adopting an evolutionary-comparative approach.     

Organizational and Individual Values: Their Main and Combined Effects on Work Attitudes and Perceptions

A survey was conducted using a convenient sample of employees (N = 999) from various industries to examine the main and combined effects of organizational and individual values on organizational commitment, perceived organizational support, and procedural justice. Moderated multiple regression analyses showed that employees' reactions were mainly explained by perceived organizational values and value preferences. In contrast, person-organization value fit and interaction effects were marginal. The implications of these findings are discussed.     

Survey Feedback as a Tool for Changing Managerial Culture: Focusing on Users' Interpretations - A Case Study

This article presents a case study in a savings bank in which a change of managerial culture is conducted over several years. A survey feedback was carried out where special attention was paid to subordinates' perceptions on managerial behaviours of the immediate manager. This intervention intended to stimulate and facilitate changes of managers' values, competences, and practices by means of providing them with relevant feedback from subordinates and by developing a team-centred process of climate analysis and change. However, perceptions and interpretations developed by managers and their subordinates about the actions undertaken emphasized political processes and power games, which caused emotional reactions such as fear, suspiciousness, and discomfort. In light of this situation, the aims, meaning, and process of the intervention, as understood and interpreted by the participants, were taken as the focus of a subsequent target of analysis and intervention. Information obtained on participants' views and the process of their deconstruction are presented. Some suggestions are made to improve professional practice, and research questions are raised that should be incorporated into the research agenda in the near future.     

Dependence on Visual Feedback During Motor Skill Learning in Alzheimer's Disease

Three experiments examined the role of visual feedback on the performance of a fine motor task, namely the rotary pursuit, in patients with Alzheimer's disease (AD) and healthy older adults. After extensive practice tracking a fully visible target, participants in Experiments 1 and 2 were tested under restricted vision (RV) conditions. In both experiments, the two groups showed a drop in performance when vision was restricted, with AD patients showing a significantly larger decline. Tracking improved significantly in normal controls, but not AD patients across the RV trials after the initial drop. When difficulty of the rotary pursuit task was manipulated in Experiment 3 without restricting vision, AD patients and normal controls showed identical patterns of performance. Consequently, it could be concluded that AD patients in the first two experiments were relying more heavily on visual information for accurate performance of the tracking task than their healthy peers.     

Body size and body esteem in women: The mediating role of possible self expectancy

We predicted that an expectancy of acquiring a feared fat self and an expectancy of acquiring a hoped-for thin self both mediate the impact of body size on women's body esteem. We also predicted that the mediating pathway through the feared fat self would be stronger than that through the hoped-for thin self. A community sample of 251 women reported their age, height, weight, and completed measures of body esteem and expectancy perceptions of acquiring the feared fat and hoped-for thin selves. Bayesian Structural Equation Modeling (SEM) demonstrated that expectancies about the feared fat self and about the hoped-for thin self mediated the relationship between body size and body esteem. Bayesian SEM also revealed that the pathway through the feared fat self was stronger than that through the hoped-for thin self. Implications for future research and the development of eating pathology are discussed.     

INTERDEPENDENCE OF STRESS PROCESSES AMONG AFRICAN AMERICAN FAMILY MEMBERS: INFLUENCE OF HIV SEROSTATUS AND A NEW INFANT

This study makes a theoretical contribution to stress process research by using a systemic approach to contextualize individual outcomes within the framework of other family members' experience. Utilizing a mixed model approach, indicators of the stress process of urban low-income HIV(+) African American recent mothers were found to affect the psychological distress and perceived adequacy of coping of multiple other family members. These relationships were found to be strongest proximal to birth and to be exacerbated by HIV infection. Social support to the mother was found to have differential effects depending on whether it was from the immediate family or outside sources. HIV infection of the recent mother was found to affect family members both through relationships of the mother's stress process and through their own coping responses.     

Identity,Perceived Religious Discrimination,and Psychological Well‐Being in Muslim Immigrant Women

The study investigated perceived religious discrimination and three facets of Muslim identity (psychological, behavioural, and visible) as predictors of psychological well‐being (life satisfaction and psychological symptoms) of 153 Muslim women in New Zealand. The results indicated that although visibility (wearing hijab) was associated with greater perceived discrimination, it predicted positive psychological outcomes. Analysis further revealed that the psychological (pride, belongingness, and centrality) and behavioural (engaging in Islamic practices) facets of Muslim identity moderated the relationship between perceived religious discrimination and well‐being. A strong psychological affiliation with Islam exacerbated the negative relationship between perceived religious discrimination and well‐being. Conversely, engaging in Islamic practices buffered the negative impact of discrimination. The research highlights the complexity of Muslim identity in diasporic women.     

The Yale-Brown Obsessive-Compulsive Scale: Confirmatory Factor Analytic Findings

The psychometric properties of the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) have recently been heavily examined. Specifically, a number of researchers have been interested in determining the factor structure of this scale to find whether it best forms a one, two, or three factor model. The present study continued this examination by considering different scaling models using confirmatory factor analysis with a sample of individuals diagnosed with Obsessive-Compulsive Disorder (OCD). One hundred and forty-six individuals diagnosed with OCD participated and were administered the Y-BOCS and scales measuring depression (Hamilton Depression Rating Scale) and anxiety (Hamilton Anxiety Rating Scale). It was found that the Y-BOCS forms two different two-factor models. One model consisted of an obsessions and compulsions factor; the other composed of disturbance and symptom severity factors. It was likewise found that depression and anxiety were related to both factors in one model (disturbance and symptom severity). The finding that depression was related to obsessions and anxiety to compulsions was found, as in a previous factor analysis of the Y-BOCS. These findings suggest that OCD may be best characterized as a multidimensional syndrome that may not be adequately examined by a single unitary factor as described in the Y-BOCS.     

The Value of Exploratory Structural Equation Modeling in Identifying Factor Overlap in the Mental Health Continuum-Short Form (MHC-SF): A Study with a New Zealand Sample

This study is the first to investigate the factor structure of the Mental Health Continuum-Short Form (MHC-SF) in New Zealand. Towards this end, traditional Confirmatory Factor Analysis (CFA) and the new method of Exploratory Structural Equation Modeling (ESEM) were used. Both ESEM and CFA supported the tripartite model of mental well-being in comparison to the one- and two-factor models; however, ESEM provided better fit with the data. Moreover, interfactor correlations were considerably lower in ESEM than they were in CFA, indicating greater factor distinctiveness in ESEM. ESEM also revealed a number of important cross-loadings for items in the measurement model of the MHC-SF. The results supported full metric and full scalar invariance of the MHC-SF across gender. The attenuated correlations among well-being factors obtained by ESEM here provide an important insight about the ongoing controversy regarding the failure of empirical research to identify distinct eudaimonic and hedonic factors in well-being measures. An overreliance on CFA methods may have led the field to rely on inflated estimates of shared variance between eudaimonia and hedonia.