Hierarchical Classes Modeling of Rating Data

Hierarchical classes (HICLAS) models constitute a distinct family of structural models for N-way N-mode data. All members of the family include N simultaneous and linked classifications of the elements of the N modes implied by the data; those classifications are organized in terms of hierarchical, if–then-type relations. Moreover, the models are accompanied by comprehensive, insightful graphical representations. Up to now, the hierarchical classes family has been limited to dichotomous or dichotomized data. In the present paper we propose a novel extension of the family to two-way two-mode rating data (HICLAS-R). The HICLAS-R model preserves the representation of simultaneous and linked classifications as well as of generalized if–then-type relations, and keeps being accompanied by a comprehensive graphical representation. It is shown to bear interesting relationships with classical real-valued two-way component analysis and with methods of optimal scaling. The research reported in this paper was supported by the Research Fund of the University of Leuven (GOA/00/02 and GOA/05/04) and by the Fund for Scientific Research-Flanders (project G.0146.06). Eva Ceulemans is a Post-doctoral Researcher supported by the Fund for Scientific Research, Flanders. The authors gratefully acknowledge the help of Gert Quintiens and Kaatje Bollaerts in collecting the data used in Section 4 and of Jan Schepers in additional analyses of these data.     

Visual interaction: models, systems, prototypes. The Pictorial Computing Laboratory at the University of Rome “La Sapienza”

This paper reports on the research activities performed by the Pictorial Computing Laboratory at the University of Rome, La Sapienza, during the last 5 years. Such work, essentially is based on the study of humancomputer interaction, spans from metamodels of interaction down to prototypes of interactive systems for both synchronous multimedia communication and groupwork, annotation systems for web pages, also encompassing theoretical and practical issues of visual languages and environments also including pattern recognition algorithms. Some applications are also considered like e-learning and collaborative work.     

The impact of implicit prejudice about the elderly on the reaction to stereotype confirmation and disconfirmation

Previous research demonstrated that perceivers explicitly condemn ingroup members who use racial stereotypes but that they are implicitly more likely to favor those ingroup members rather than ingroup members who do not use racial stereotypes (Castelli et al., 2001). The present study has two main goals. First, we want to investigate whether the same effects can be detected in the domain of ageism. In particular, we predicted that young adults would implicitly but not explicitly favor a young male who describes an old man in a stereotype-consistent way rather than in a stereotypeinconsistent way. Most importantly, we hypothesized that this tendency is related to participants’ prejudice level as assessed through an implicit measure (IAT, Greenwald et al., 1998), so that high prejudice individuals will implicitly favor stereotypere and derogate ingroup members who use stereotype-inconsistent information. Results provide general support for the hypotheses, and their implications for stereotype maintenance and change are discussed. Preparation of this paper was supported by a research grant from the University of Padova to the first author (CPDG018859).     

The spontaneous use of a group typology as an organizing principle in memory

Five studies investigated the spontaneous use of group typology in encoding information about various social groups. Participants saw faces or behaviors along with a label indicating the group membership of the face or the behavior. Labels corresponded to 2 groups each of 3 group types (i.e., 2 intimacy groups, 2 task-oriented groups, and 2 social categories). Recognition results showed more within-group-type errors than between-group-types errors. A free-recall task replicated these results, as the sequence of remembering items showed that memory organization reflected the group typology. A final study investigated the effects of group typology on the speed and accuracy of category membership verification. Results demonstrate the spontaneous use of an implicit group typology and its influence on the cognitive organization of information about groups.     

An Emotionally Inexpressive (Type C) Coping Style Influences HIV Disease Progression at Six and Twelve Month Follow-ups

This study examined the effects of specific psychosocial factors on the progression of HIV infection in 200 HIV-1 seropositive but asymptomatic men and women. At baseline, participants' disease status was determined, and they were administered self-report assessments of coping style, social support and loneliness. Participants were classified at 6 and 12 month follow-ups as progressed or unchanged, compared to their baseline status. In logistic regression analyses, higher baseline Type C coping scores (indicating emotional inexpressiveness and decreased recognition of needs and feelings) significantly predicted progression at 6 months ( p <0.01) and 12 months ( p <0.02), but only among participants classified at baseline as CDC-A2 (between 200-499 CD4 cells/mm 3 ). In participants originally classified as CDC-A1 (CD4 cell counts > 500/mm 3 ), no psychosocial variable showed any significant relationship. Results emphasize the need to consider the disease context, as well as the interaction between biological and psychological factors in contributing to disease progression.     

Dual commitment profiles and job satisfaction among temporary agency workers

Temporary agency workers (TAWs) are an ever-increasing type of employees which establish a double work relationship with both the agency and the client organization. Within this context, the concept of dual commitment has received considerable attention in the last years. The present contribution integrates dual commitment line of research with the one adopting a person-centered approach to the study of commitment configurations, to investigate commitment profiles on a large sample of TAWs. According to Sinclair et al.'s framework, we aimed to identify TAWs' commitment profiles based on their levels of dual affective commitment (to the agency and to the client organization) and on their general continuance commitment and to investigate differences in job satisfaction among profiles. Latent profile analyses on 7225 TAWs revealed 5 distinct profiles, namely Dually Free Agents, Dually Involved, Dually Allied, (Unilaterally) Client Allied and (Unilaterally) Agency Invested. The Dually Involved profile, followed by the Dually Allied profile, had the highest level of job satisfaction, whereas the Dually Free Agent profile and the (Unilaterally) Agency Invested had the lowest. Furthermore, the (Unilaterally) Client Allied group had a higher level of job satisfaction as compared to the (Unilaterally) Agency Invested profile. Implications are discussed.     

Long life to emotions: emotional response categorisation across the lifespan

People perceive and organise their social world on the basis of their previous semantic knowledge as well as on the basis of their emotional responses. We tested the hypothesis that emotional response categorisation, namely the tendency to group stimuli on the basis of the emotion they evoke, increases across the lifespan. Young and older adults were asked to categorise target words and either conceptual or emotional response similarity could be used to perform the task. Results showed that older adults were more likely than younger adults to rely on emotional equivalence to categorise stimuli. In addition, current affective state was significantly related to emotional response categorisation. These findings are discussed in relation to recent models that propose a prominent role for emotions in the social life of older adults.     

The Impact of Culture on the Individual Subjective Well-Being of the Italian Population: An Exploratory Study

The aim of this study is to explore the relationship between cultural access and individual psychological well-being, in order to provide a possible estimation of the impact of cultural participation upon subjective perceptions of well being. Our exploratory research was based on a cross-sectional survey undertook on a medium-large sample (n = 1500) of Italian residents in fall 2008. We refer to the Psychological General Well-Being Index–PGWBI, a tool that has been validated through 30 years of research, as an index of measurement. Moreover, we have administered to the sample an additional questionnaire inquiring about access to 15 distinct culturally related activities. Data are processed by means of a specific methodology based on ANN and Called TWIST. TWIST has been developed by the Semeion Research Center, Rome. Our analysis suggests that culture has a relevant role as a determinant of individual psychological well-being, in that a selected subset of cultural variables turn out to perform among the best predictors of individual PGWB levels. Our results also allow some preliminary considerations about innovative, well-being focused public health policies leveraging upon the human and social developmental role of culture.     

Associations between personality traits, physical activity level, and muscle strength

Associations among personality as measured by the Five Factor Model, physical activity, and muscle strength were assessed using data from the Baltimore Longitudinal Study of Aging (N = 1220, age: mean = 58, SD = 16). General linear modeling with adjustment for age, sex, race, and body mass index, and bootstrapping for mediation were used. We found neuroticism and most of its facets to negatively correlate with strength. The extraversion domain and its facets of warmth, activity, and positive-emotions were positively correlated with strength, independent of covariates. Mediation analysis results suggest that these associations are partly explained by physical activity level. Findings extend the evidence of an association between personality and physical function to its strength component and indicate health behavior as an important pathway.     

Eye gaze cannot be ignored (but neither can arrows)

Recent studies have tried to shed light on the automaticity of attentional shifts triggered by gaze and arrows with mixed results. In the present research, we aimed at testing a strong definition of resistance to suppression for orienting of attention elicited by these two cues. In five experiments, participants were informed with 100% certainty about the future location of a target they had to react to by presentation of either a direction word at the beginning of each trial or instructions at the beginning of each block. Gaze and arrows were presented before the target as uninformative distractors irrelevant for the task. The results showed similar patterns for gaze and arrows-namely, an interference effect when the distractors were incongruent with the upcoming target location. This suggests that the orienting of attention mediated by gaze and arrows can be considered as strongly automatic.