Playing Smart: The Mating Game and Mating Intelligence

Current work investigated the extent to which mating intelligence was related to one’s own mate value as well as the value of one’s mate. We hypothesized that (1) mating intelligence is positively correlated with measures of self-perceived mate value, (2) greater mating intelligence is associated with greater partner mate value, (3) greater mating intelligence is associated with less mate settling, and according to Parental Investment Theory, females are predicted to have significantly higher mean mate value than males. Along with the adoption of the Mate Value Inventory and Mating Intelligence Scale, a method was developed to assess a more objective rating of self and partner’s physical attractiveness. A large sample (N > 500) was obtained for this study via internet survey. As predicted, mating intelligence appeared to be a valid predictor of one’s own value in the mating market, as well as the quality of mates that one can attract. High mating intelligence also corresponded to lower mate value discrepancy within a mateship. That is, high MI tended to go with a relatively small gap between the mate value of oneself and the mate value of ones partner, or less mate settling. Moreover, the positive relationship between objective and subjective ratings of self and partner’s physical attractiveness suggests that participants were able to judge themselves and their partners through the eyes of another. In all, evidence from the current work suggests that mating intelligence has important implications for individuals’ mating behavior within the mating market.     

Updating Thought Theory: Emotion and the Non‐Paradox of Fiction

Over the past four decades, the paradox of fiction has sparked considerable debate among philosophers. Unfortunately, the most promising solution to this puzzle, thought theory, currently earns its plausibility by way of intuition rather than evidence. I aim to address this by updating thought theory in light of recent empirical findings on affect. I will draw upon a wide range of scientific research—on the cognitive mechanisms driving emotion, the role of affect in counterfactual mind wandering and prospection, and the evolutionary function of affect—to substantiate the claim that fictions can give rise to both real and rational emotional states.     

Dexamethasone Does Not Prevent Seven-Day ADX-Induced Apoptosis in the Dentate Gyrus of the Rat Hippocampus

Long-term adrenalectomy (ADX) is known to result in apoptosis within the dentate gyrus of the rat hippocampus. While the underlying mechanism is still unclear, adrenal steroids appear to play a pivotal role in granule cell survival, as administration of the mineralocorticoid receptor (MR) agonists, corticosterone and aldosterone, to ADX rats results in protection against the ADX-induced effect. The consequence of administration of the glucocorticoid receptor (GR) agonists, dexamethasone and RU28362, however, is less clear, and either complete or only partial protection for the ADX animal has been reported. This study investigated further the role played by GR in the degenerative process. After establishing the characteristics of seven-day ADX-induced apoptosis in the young male Wistar rat, the effect of chronically-implanted, subcutaneous pellets containing various doses of dexamethasone and corticosterone, on ADX-induced apoptosis was studied. Both high and low doses of corticosterone were found to be protective. In contrast to some other studies, however, neither dose of dexamethasone had any obvious protective effect and rather seemed to increase apoptosis in dentate gyrus of intact animals. Intracerebroventricular infusion of dexamethasone for seven days was also found to be ineffective in preventing apoptosis, demonstrating that it is occupation of MR, rather than GR, which is crucial to dentate gyrus granule cell survival.     

Indigenisation of Psychology: The Concept and its Practical Implementation

Le concept, souvent mal compris, de psychologie indigoène est examiné dans une perspective de méta-discipline, qu'autorise une étude de psychologie sociale interculturelle. On discutera de l'accent mis sur un aspect comme étant inexact dans les faits, théoriquement trompeur et politiquement dangereux.
The often misunderstood concept of indigenous psychologies is examined from the meta-discipline perspective afforded by a social-psychological study of the science. Motivation underlying the indigenisation movement, semantic difficulties with the concept, and models for indigenisation of the discipline are examined. The commonly accepted building-block approach is of increasing numbers of indigenous contributions leading to an emerging indigenous psychology. An alternative, but often overlooked approach, is of autochthonous discipline development leading to increasing numbers of seasoned researchers creatively pursuing culturally relevant research. Both approaches are intertwined and necessary for a more encompassing definition and understanding of the indigenisation process. An overview of the required elements for this broader definition indicate the need for simultaneous pursuit of research in the local culture and autochthonous discipline development, demands that can place the researcher in an essential tension.     

Why Dexamethasone Poorly Penetrates in Brain

Dexamethasone poorly penetrates in brain. A tracer amount of [3H]-dexamethasone administered to adrenalectomized rats or mice is poorly retained by glucocorticoid receptors in brain, while pituitary corticotrophs containing equivalent amounts of these receptors accumulate and retain large amounts of this synthetic steroid. However, adrenalectomized mice with a genetic disruption of the multiple drug resistance (mrd1a) gene have a tenfold increase of [3H]-dexamethasone uptake in brain glucocorticoid target sites reaching levels observed in the pituitary. These data demonstrate that dexamethasone is extruded from brain by the mrd1a-encoded P-glycoproteins. The data support the concept of a pituitary site of action of dexamethasone in blockade of stress-induced ACTH release, which implies that chronic dexamethasone treatment does not replace the endogenous corticosteroids depleted from brain mineralocorticoid (MRs) and glucocorticoid receptors (GRs). Dexamethasone, therefore, causes a profound disturbance in the balance of these two receptor types in hippocampus, which is an unfavourable condition threatening the neuronal integrity of this brain structure through the expression of noxious genes.     

Social processing improves recall performance

One recent theory (Dunbar, 2003) has highlighted the importance that processing social information might have had on the evolution of human cognition. Based on an analysis of that theory, researchers predicted that processing information in a social manner would improve recall performance in comparison with nonsocial processing. In order to test this prediction, three experiments were conducted in which participants studied 30-item word lists that were composed of common character traits (Experiment 1) or common category exem-plars (Experiments 2 and 3). Next, participants reviewed 5 list items that were purportedly recalled by either a group member or the computer. Finally, after a brief distractor task, participants were asked to complete an individual recall test for all of the items on the original 30-item list. Of primary interest was recall performance for the list items that were purportedly recalled by either another participant or the computer. We observed that recall performance for list items purportedly recalled by another participant was superior to that for items that were recalled by the computer.