Parahippocampal and retrosplenial contributions to human spatial navigation

Spatial navigation is a core cognitive ability in humans and animals. Neuroimaging studies have identified two functionally defined brain regions that activate during navigational tasks and also during passive viewing of navigationally relevant stimuli such as environmental scenes: the parahippocampal place area (PPA) and the retrosplenial complex (RSC). Recent findings indicate that the PPA and RSC have distinct and complementary roles in spatial navigation, with the PPA more concerned with representation of the local visual scene and RSC more concerned with situating the scene within the broader spatial environment. These findings are a first step towards understanding the separate components of the cortical network that mediates spatial navigation in humans.     

A preliminary comparison of functional analysis results when conducted in contrived versus natural settings

A preliminary evaluation of the correspondence between functional analysis outcomes across settings was conducted with 2 children who had been diagnosed with autism and who engaged in challenging behavior. Differences across settings (a therapy room and a classroom) were demonstrated in ABAB reversal designs. Three potential patterns of results that may occur when comparing functional analyses across environments are described, and one possible explanation for the occurrence of discrepancies between environments (differing learning histories within separate environments) is offered.     

Reduced constituent category application in surprising combinations

In a previous study (R. R. C. Hutter & R. J. Crisp, 2005), the authors suggested that one way in which perceivers resolve the dilemma of shared membership of incongruent category combinations is by generating emergent attributes. However, the authors also found evidence that a corresponding process of reduced constituent facilitation occurs. In the present research, the authors aimed to isolate this phenomenon using a response-time methodology. Participants were exposed to subliminal unsurprising or surprising gender-occupation category-combination primes. The authors observed facilitation in overall response times on a subsequent lexical decision task to constituent attributes when the combination primed was unsurprising compared with surprising, but only for female and not for male combinations. The authors suggest that perceivers reduce their application of constituent attributes when processing surprising versus unsurprising combinations.     

mold,mould, mole‐d: the three m's of career development

The author explores a creative idea development process wherein one begins by applying the image of “breaking the mold” to career development and then extending the process further by considering other related images. In this article, the related images include synonyms for mold such as mould and mole‐d (the mole is a small burrowing animal with limited vision). Together, these images reflect current career development issues, such as the need for flexibility, health, and vision (sight and insight). These concepts have both practical and theoretical relevance for employment counselors.     

An Efficient MCMC Algorithm to Sample Binary Matrices with Fixed Marginals

Uniform sampling of binary matrices with fixed margins is known as a difficult problem. Two classes of algorithms to sample from a distribution not too different from the uniform are studied in the literature: importance sampling and Markov chain Monte Carlo (MCMC). Existing MCMC algorithms converge slowly, require a long burn-in period and yield highly dependent samples. Chen et al. developed an importance sampling algorithm that is highly efficient for relatively small tables. For larger but still moderate sized tables (300×30) Chen et al.’s algorithm is less efficient. This article develops a new MCMC algorithm that converges much faster than the existing ones and that is more efficient than Chen’s algorithm for large problems. Its stationary distribution is uniform. The algorithm is extended to the case of square matrices with fixed diagonal for applications in social network theory. I am indebted to my colleague Gunter Maris for his suggestion to add a Metropolis–Hastings step as the finishing touch of the algorithm.     

Rare male aggression directed toward females in a female‐dominated society: Baiting behavior in the spotted hyena

Spotted hyenas (Crocuta crocuta) are gregarious carnivores. The females are socially dominant to males, and adult males rarely direct aggression toward adult females. This study analyzed all cases in which adult immigrant males behaved aggressively toward adult females in a large population of free‐living hyenas in Kenya, observed for 11 years. Our goals were to describe the conditions under which male attacks on females occur, and address possible adaptive functions. Most aggression directed by adult immigrant males against females occurred when coalitions of two or more males attacked a single adult female, who typically responded by defending herself and fighting back. Male aggression against females frequently occurred at sites of ungulate kills, but males never behaved aggressively toward females over food, and all male attacks on females were unprovoked. Although no mounting or other copulatory behaviors ever occurred during or immediately after an attack, the number of male attacks on females peaked around the time of conception. Daily rates at which males attacked females did not vary with female social rank. However, daily attack rates did vary significantly with female reproductive state, and the highest rates of male attack on females were observed during the two stages of the reproductive cycle during which females were most likely to conceive litters. The adaptive significance of male aggression against females in this species remains unknown, but a tight association between male attacks on females and a female's time of conception provides strong evidence of some role for male aggression in hyena sexual behavior. In particular, our data are consistent with hypotheses suggesting that male aggression toward females in this species either serves to inform females about male fitness or represents sexual harassment. Aggr. Behav. 29:457–474, 2003. © 2003 Wiley‐Liss, Inc.     

When marital interaction and intervention researchers arrive at different points of view: the active listening controversy

In 1998, John Gottman and his associates published an article which asserted that training 'active listening' between couples was an ineffective therapeutic intervention. Not surprisingly, this claim generated considerable controversy, particularly in relation to treatment and educational models that were heavily dependent on active listening as a major part of their intervention programmes. The authors of one such approach, the Prevention and Relationship Enhancement Program (PREP), were particularly vocal in their disagreement with Gottman's conclusions. This paper provides an account of the controversy, a summary of the current status of the debate and a discussion of the remaining unanswered questions.     

Counseling the Client With Prostate Cancer

Prostate cancer is prevalent in the United States today and has a far‐reaching effect on men and their relationships. Being diagnosed with and treated for prostate cancer often causes men to experience side effects that induce physical, emotional, and social change. Counselors need to be aware of prostate cancer's impact on men and their families.     

Chinese affect circumplex: I. Structure of recalled momentary affect

The structure of momentary affect among Cantonese-speaking Chinese was explored by developing questionnaire scales in four response formats. Scales can be scored for dimensions defined by Feldman Barrett and Russell; Thayer; Larsen and Diener; and Watson and Tellegen. In a study of recalled affect ( N  = 487), the newly translated scales were found to support all but Watson and Tellegen's structural model originating from English. Results cross-validated well in a second sample ( N  = 402). Affect dimensions were interrelated as found with English-speaking Canadians and they could be integrated into a two-dimensional bipolar space.