Dispositional and Situational Moderators of the Relationship Between Leader–Member Exchange and Work Tension

This paper examines the relationship between leader–member exchange (LMX) and experienced work tension. The dispositional moderators of positive affectivity (PA) and negative affectivity (NA) and the situational moderator of frequency of interaction with the supervisor are included. We tested these relationships in a sample of 537 employees from various organizations. Specifically, we found that high NA coupled with high LMX produced the highest levels of work tension. Additionally, low frequency of interaction with the supervisor coupled with high LMX produced the highest levels of work tension. Finally, we found that the lowest levels of work tension were reported when individuals had high PA, high LMX, and high frequency of interaction with their supervisors.     

Conceptual Hierarchies in a Flat Attractor Network: Dynamics of Learning and Computations

The structure of people's conceptual knowledge of concrete nouns has traditionally been viewed as hierarchical ( Collins & Quillian, 1969 ). For example, superordinate concepts ( vegetable ) are assumed to reside at a higher level than basic-level concepts ( carrot ). A feature-based attractor network with a single layer of semantic features developed representations of both basic-level and superordinate concepts. No hierarchical structure was built into the network. In Experiment and Simulation 1, the graded structure of categories (typicality ratings) is accounted for by the flat attractor network. Experiment and Simulation 2 show that, as with basic-level concepts, such a network predicts feature verification latencies for superordinate concepts ( vegetable ). In Experiment and Simulation 3, counterintuitive results regarding the temporal dynamics of similarity in semantic priming are explained by the model. By treating both types of concepts the same in terms of representation, learning, and computations, the model provides new insights into semantic memory.     

The Experiences of Indigenous Australian Psychologists at University

Disparities exist between Indigenous Australians and non‐Indigenous Australians on indicators of life expectancy, alcohol and drug use, adult and juvenile incarceration, and rates of hospitalisation for self‐harm, suicide, and mental and behavioural disorders due to psychoactive substance use. Psychology is a discipline that can assist in remedying these issues, yet disparities are evident in Indigenous participation in higher education generally, as well as within tertiary psychology education specifically. Ten Indigenous Australian psychologists were interviewed to investigate possible barriers and enablers for Indigenous students studying psychology at university. Hermeneutic phenomenology guided the research and its analysis, whereby the data went through a process known as the “hermeneutic circle”; data were analysed in itself, as well as part of the whole, leading to the world views of the participant and researcher converging into a “horizon of meaning.” Sources of support for Indigenous students included family support, financial assistance, and Indigenous student support centres. Potential barriers to university study of psychology were negative conceptions of higher education and psychology by the Indigenous community, “culture shock” upon relocating to the metropolitan area, a lack of Indigenous content and staff, and culturally insensitivity by staff members. Efforts should be made to address these barriers to participation, as well as to support those structures and services that were supportive for students.     

The homogeneity effect on figure/ground perception in infancy

We examined whether the homogeneity of the two profiles of Rubin's goblet affects figure/ground perception in infants. We modified the two profiles of Rubin's goblet in order to compare figure/ground perception under four test patterns: (1) two profiles painted with horizontal lines (horizontal-line condition), (2) two profiles painted middle gray (uni-color condition), (3) one profile painted light gray and the other dark gray (two-color condition), and (4) a goblet painted with concentric circles (concentric-circles condition). In the horizontal-line condition the homogeneity of the profile was strengthened, and in the two-color condition the homogeneity of the profile was weakened compared to the uni-color condition, which was an original Rubin's goblet. In the concentric-circles condition the homogeneity of the reversed areas of the horizontal-line were strengthened.