Flexibility of cue use in the fox squirrel (Sciurus niger)

Recent work on captive flying squirrels has demonstrated a novel degree of flexibility in the use of different orientation cues. In the present study, we examine to what extent this flexibility is present in a free-ranging population of another tree squirrel species, the fox squirrel. We trained squirrels to a rewarded location within a square array of four feeders and then tested them on transformations of the array that either pitted two cue types against one cue type, the majority tests, or all cue types against each other, the forced-hierarchy test. In Experiment 1, squirrels reoriented to the two-cue-type location in all majority tests and to the location indicated by the visual features of the feeders in the forced-hierarchy test. This preference for visual features runs contrary to previous studies that report the use of spatial cues over visual features in food-storing species. In Experiments 2-5 we tested squirrels with different trial orders (Experiments 2 and 3), a different apparatus (Experiment 4) and at different times of the year (Experiment 5) to determine why these squirrels had chosen to orient using visual features in the first experiment. Like captive flying squirrels, free-ranging fox squirrels showed a large degree of flexibility in their use of cues. Furthermore, their cue use appeared to be sensitive both to changes in the test apparatus and the season in which we tested. Altogether our results suggest that the study of free-ranging animals over a variety of conditions is necessary for understanding spatial cognition.     

Perceptions about fleeing religious persecution and entrance to the US

Using four vignettes to study attitudes toward religious persecution, a woman or man aged 22 or 68 came to the US with no supporting documentation. A General Linear Model analysed the 12 items for each vignette. Three items were significant among the vignettes: “All immigration policies and laws should be observed even if it means that M may not be granted permission to stay”; “M’s gender might be an indicator that M wishes to do harm to the US and its citizens” and “M should be deported because s/he entered the country illegally.” Gender and age impact these perceptions.     

Knowledge and attitude of Malaysia’s Muslim faith healers in dealing with the mentally ill

Muslim faith healers are often sought by the Malaysian public as an avenue to address psychological distress. “Ruqyah” refers to the recitation of verses from the Qur'an and/or sayings of Prophet Muhammad (PBUH) and is used by Muslim faith healers as a method of treatment. This study was conducted to assess the knowledge and attitude of Muslim faith healers in dealing with psychiatric patients in Malaysia. Seven Muslim faith healers were interviewed. The interviews were transcribed verbatim, and analysed qualitatively using thematic content analysis. The authors identified four themes: understanding of psychiatric illnesses, diagnostic competence, patients' referral, and integrating “ruqyah” into mainstream psychiatry. It was found that the respondents had limited knowledge of psychiatric illness, focusing on “ruqyah” as the main intervention in treating psychiatric illness. Recognizing the important role played by Muslim faith healers in the treatment of psychiatric illness in Malaysia, collaboration between them and fellow psychiatrists is deemed highly necessary.     

The K-factor: Individual differences in life history strategy

Until recently, variations in life history strategy were studied exclusively at the species level. Although this domain of study has been extended to examine systematic differences in life history strategy among various human ethnic groupings, more recent evolutionary theories of human development and related behavioral genetic work imply substantial within-group individual variation in life history strategy. We constructed a latent variable model identifying a single common factor, denoted as K, which underlies a variety of otherwise disparate life history parameters. This “K-Factor” loaded 0.36 on childhood attachment to the biological father, −0.36 on childhood attachment to any non-biological father figure, 0.38 on adult romantic partner attachment, −0.51 on mating effort, −0.58 on Machiavellianism, and −0.41 on risk propensity. The bivariate correlations of the K-factor with higher-order personality factors were statistically significant, −0.24 with “Big Neuroticism” and −0.67 with “Big Psychoticism”, and approached significance, correlating 0.12, with “Big Extraversion”. The K-factor appears to be an underappreciated individual difference variable of major importance to human development.     

Enhanced response inhibition during intensive meditation training predicts improvements in self-reported adaptive socioemotional functioning

We examined the impact of training-induced improvements in self-regulation, operationalized in terms of response inhibition, on longitudinal changes in self-reported adaptive socioemotional functioning. Data were collected from participants undergoing 3 months of intensive meditation training in an isolated retreat setting (Retreat 1) and a wait-list control group that later underwent identical training (Retreat 2). A 32-min response inhibition task (RIT) was designed to assess sustained self-regulatory control. Adaptive functioning (AF) was operationalized as a single latent factor underlying self-report measures of anxious and avoidant attachment, mindfulness, ego resilience, empathy, the five major personality traits (extroversion, agreeableness, conscientiousness, neuroticism, and openness to experience), difficulties in emotion regulation, depression, anxiety, and psychological well-being. Participants in Retreat 1 improved in RIT performance and AF over time whereas the controls did not. The control participants later also improved on both dimensions during their own retreat (Retreat 2). These improved levels of RIT performance and AF were sustained in follow-up assessments conducted approximately 5 months after the training. Longitudinal dynamic models with combined data from both retreats showed that improvement in RIT performance during training influenced the change in AF over time, which is consistent with a key claim in the Buddhist literature that enhanced capacity for self-regulation is an important precursor of changes in emotional well-being.     

Coregistration of eye movements and EEG in natural reading: analyses and review

Brain-electric correlates of reading have traditionally been studied with word-by-word presentation, a condition that eliminates important aspects of the normal reading process and precludes direct comparisons between neural activity and oculomotor behavior. In the present study, we investigated effects of word predictability on eye movements (EM) and fixation-related brain potentials (FRPs) during natural sentence reading. Electroencephalogram (EEG) and EM (via video-based eye tracking) were recorded simultaneously while subjects read heterogeneous German sentences, moving their eyes freely over the text. FRPs were time-locked to first-pass reading fixations and analyzed according to the cloze probability of the currently fixated word. We replicated robust effects of word predictability on EMs and the N400 component in FRPs. The data were then used to model the relation among fixation duration, gaze duration, and N400 amplitude, and to trace the time course of EEG effects relative to effects in EM behavior. In an extended Methodological Discussion section, we review 4 technical and data-analytical problems that need to be addressed when FRPs are recorded in free-viewing situations (such as reading, visual search, or scene perception) and propose solutions. Results suggest that EEG recordings during normal vision are feasible and useful to consolidate findings from EEG and eye-tracking studies.     

Mother-to-Daughter Disclosure After Divorce: Are There Costs and Benefits?

To investigate the association between post-divorce mother-to-daughter disclosure regarding sensitive topics and adolescent daughters' adjustment and closeness to mother, we collected data from 62 adolescent girls within the first two years after their mother's divorce. Analyses revealed that most mothers in the current sample have disclosed to their daughters to some degree about the five sensitive topic areas studied. In accordance with structural family systems theory, we found that detailed mother-to-daughter disclosures regarding financial concerns, negativity toward ex-husband, job ups-and-downs, and personal concerns were clearly associated with greater daughter psychological distress, but not with greater feelings of mother-daughter closeness, as existing retrospective research would have predicted. Daughters' worrying about their mothers explained (mediated) the link between maternal disclosure and daughter's distress to some extent. We discuss methodological issues as well as the valuable contributions that future, more contextualized research could make to understanding the conditions under which detailed mother-to-adolescent disclosure may be more or less risky.