Acute ethanol ingestion impairs appetitive olfactory learning and odor discrimination in the honey bee

Invertebrates are valuable models for increasing our understanding of the effects of ethanol on the nervous system, but most studies on invertebrates and ethanol have focused on the effects of ethanol on locomotor behavior. In this work we investigate the influence of an acute dose of ethanol on appetitive olfactory learning in the honey bee (Apis mellifera), a model system for learning and memory. Adult worker honey bees were fed a range of doses (2.5%, 5%, 10%, or 25%) of ethanol and then conditioned to associate an odor with a sucrose reward using either a simple or differential conditioning paradigm. Consumption of ethanol before conditioning significantly reduced both the rate of acquisition and the asymptotic strength of the association. Honey bees also exhibited a dose dependent reduction in arousal/attention during conditioning. Consumption of ethanol after conditioning did not affect recall 24h later. The observed deficits in acquisition were not due to the affect of ethanol on gustatory sensitivity or motor function. However, honey bees given higher doses of ethanol had difficulty discriminating amongst different odors suggesting that ethanol consumption influences olfactory processing. Taken together, these results demonstrate that an acute dose of ethanol affects appetitive learning and olfactory perception in the honey bee.     

Graduate employment status and health: a longitudinal analysis of the transition from student

The prevalence of unemployment and underemployment was explored longitudinally in 248 recent graduates (73 males and 175 females) over an 18–24 month transition from final year student to 9–12 months post-graduation. Over this period changes in levels of psychological distress, health behaviours, social support, optimism and achievement motivation were measured. Results show that both unemployment and underemployment have deleterious effects on psychological and physical health, social support, optimism and achievement motivation.

A Review of Research in the Social Scientific Study of Religion,Volume 15

Book reviewed in this article: Ralph L. Piedmont and David O. Moberg, Eds. (2005). Research in the Social Scientific Study of Religion, Volume 15.     

Learning a keying sequence you never executed: Evidence for independent associative and motor chunk learning

A substantial amount of research has addressed how people learn and control movement sequences. Recent results suggested that practice with discrete key pressing sequences results in two types of sequence learning: associative learning and motor chunk development (Verwey & Abrahamse, 2012). In the present study, we addressed whether in keying sequences of limited length associative learning develops also when the use of the chunking mode is prevented by introducing during practice random deviants. In line with the notion of two different learning mechanisms, the present results indicate that associative sequence learning develops when motor chunks cannot be developed during practice. This confirms the notion that motor chunks do not rely on these associations. In addition, experience with a particular execution mode during the practice phase seems to benefit subsequent use of that mode with unfamiliar and random sequences. Also, participants with substantial video-gaming experience were faster in executing discrete keying sequences in the chunking mode. These last two results may point to the development of a general ability to produce movement sequences in the chunking mode.     

Perceived differences between chimpanzee (Pan troglodytes) and human (Homo sapiens) facial expressions are related to emotional interpretation

Human face perception is a finely tuned, specialized process. When comparing faces between species, therefore, it is essential to consider how people make these observational judgments. Comparing facial expressions may be particularly problematic, given that people tend to consider them categorically as emotional signals, which may affect how accurately specific details are processed. The bared-teeth display (BT), observed in most primates, has been proposed as a homologue of the human smile (J. A. R. A. M. van Hooff, 1972). In this study, judgments of similarity between BT displays of chimpanzees (Pan troglodytes) and human smiles varied in relation to perceived emotional valence. When a chimpanzee BT was interpreted as fearful, observers tended to underestimate the magnitude of the relationship between certain features (the extent of lip corner raise) and human smiles. These judgments may reflect the combined effects of categorical emotional perception, configural face processing, and perceptual organization in mental imagery and may demonstrate the advantages of using standardized observational methods in comparative facial expression research.     

Reality monitoring and the media

The study of reality monitoring is concerned with the factors and processes that influence the veridicality of memories and knowledge, and the reasonableness of beliefs. In thinking about the mass media and reality monitoring, there are intriguing and challenging issues at multiple levels of analysis. At the individual level, we can ask how the media influence individuals' memories, knowledge and beliefs, and what determines whether individuals are able to identify and mitigate or benefit from the media's effects. At the institutional level, we can ask about the factors that determine the veridicality of the information presented, for example, the institutional procedures and criteria used for assessing and controlling the quality of the products produced. At the inter‐institutional level we can consider the role that the media play in monitoring the products and actions of other institutions (e.g. government) and, in turn, how other institutions monitor the media. Interaction across these levels is also important, for example, how does individuals' trust in, or cynicism about, the media's institutional reality monitoring mechanisms affect how individuals process the media and, in turn, how the media engages in intra‐ and inter‐institutional reality monitoring. The media are interesting not only as an important source of individuals' cognitions and emotions, but for the key role the media play in a critical web of social/cultural reality monitoring mechanisms. Copyright © 2007 John Wiley & Sons, Ltd.     

Culture and the behavioural manifestations of traits: an application of the Act Frequency Approach

The behavioural manifestations of Big Five traits were compared across cultures using the Act Frequency Approach. American (n = 176) and Filipino (n = 195) students completed a Big Five measure and act frequency ratings for behaviours performed during the past month. Acts for specific traits cohered to an equivalent degree across cultures. In both cultures, the structure of act composites resembled the Big Five and the strength of trait‐behaviour relationships was very similar. Many acts were multidimensional and analyses revealed cultural commonalities and differences in the relevance and prevalence of acts for the Big Five traits. The results were more consistent with trait than cultural psychology perspectives, because traits predicted behaviour equally well, on average, in the two cultures. Copyright © 2007 John Wiley & Sons, Ltd.