Hippocampal structure and human cognition: Key role of spatial processing and evidence supporting the efficiency hypothesis in females

Here we apply a method for automated segmentation of the hippocampus in 3D high-resolution structural brain MRI scans. One hundred and four healthy young adults completed twenty one tasks measuring abstract, verbal, and spatial intelligence, along with working memory, executive control, attention, and processing speed. After permutation tests corrected for multiple comparisons across vertices (p < .05), significant relationships were found for spatial intelligence, spatial working memory, and spatial executive control. Interactions with sex revealed significant relationships with the general factor of intelligence (g), along with abstract and spatial intelligence. These correlations were mainly positive for males but negative for females, which might support the efficiency hypothesis in women. Verbal intelligence, attention, and processing speed were not related to hippocampal structural differences.     

Object detection in natural scenes: Independent effects of spatial and category-based attention

Humans are remarkably efficient in detecting highly familiar object categories in natural scenes, with evidence suggesting that such object detection can be performed in the (near) absence of attention. Here we systematically explored the influences of both spatial attention and category-based attention on the accuracy of object detection in natural scenes. Manipulating both types of attention additionally allowed for addressing how these factors interact: whether the requirement for spatial attention depends on the extent to which observers are prepared to detect a specific object category—that is, on category-based attention. The results showed that the detection of targets from one category (animals or vehicles) was better than the detection of targets from two categories (animals and vehicles), demonstrating the beneficial effect of category-based attention. This effect did not depend on the semantic congruency of the target object and the background scene, indicating that observers attended to visual features diagnostic of the foreground target objects from the cued category. Importantly, in three experiments the detection of objects in scenes presented in the periphery was significantly impaired when observers simultaneously performed an attentionally demanding task at fixation, showing that spatial attention affects natural scene perception. In all experiments, the effects of category-based attention and spatial attention on object detection performance were additive rather than interactive. Finally, neither spatial nor category-based attention influenced metacognitive ability for object detection performance. These findings demonstrate that efficient object detection in natural scenes is independently facilitated by spatial and category-based attention.     

A Systematic Review of the Psychometric Properties of Trait Cognitive Self-Report Measures in Social Anxiety

Cognitive factors, including beliefs, thoughts and assumptions have been found to play an important role in the development and maintenance of Social Anxiety Disorder. Trait cognitive self-report measures of social anxiety are widely used in research and clinical settings. It is imperative that only measures with good psychometric properties are used in order to interpret assessment scores accurately, and to make valid and reliable conclusions. The present systematic review evaluated the psychometric properties of trait cognitive self-report measures of social anxiety. Relevant studies were identified via a comprehensive and systematic search of academic databases. The reported psychometric properties of included studies were analysed by applying an appraisal of adequacy tool developed by Terwee et al. (2007). Of the 3091 studies identified, 50 studies met the inclusion criteria, and they included 21 measures. Included studies demonstrated that a number of measures had some adequate psychometric properties, however, no measure fulfilled criteria for all psychometric properties according to the appraisal tool. Findings highlight the need to further establish the psychometric properties of cognitive self-report measures of social anxiety in clinical and research settings through additional empirical studies.     

Comparing resetting to non‐resetting DRO procedures to reduce stereotypy in a child with autism

We compared a resetting to a non‐resetting differential reinforcement of other behavior (DRO) procedure to reduce stereotypy exhibited by young boy with autism. During the resetting DRO, a reinforcer was delivered contingent upon the absence of stereotypy during the DRO interval. If stereotypy occurred, the DRO interval was immediately reset. The non‐resetting DRO procedure was identical, except that contingent upon stereotypy, the DRO interval continued until it expired; a new DRO interval then began. Results indicate that the DRO procedures were equally effective to reduce stereotypy, but the participant preferred the resetting DRO procedure.     

The effects of managerial regulatory fit priming on reactions to explanations

We investigated the interactive effects of regulatory focus priming and message framing on the perceived fairness of unfavorable events. We hypothesized that individuals’ perceptions of fairness are higher when they receive a regulatory focus prime (promotion versus prevention) that is congruent with the framing of an explanation (gain versus loss), as opposed to one that is incongruent. We also hypothesized that these effects are mediated by counterfactual thinking. Three studies revealed that primed regulatory fit (promotion/gain or prevention/loss) led to higher levels of justice perceptions than regulatory misfit (promotion/loss or prevention/gain). Additionally, “could” and “should” counterfactuals partially mediated the relationship between regulatory fit and interactional justice (Study 3).     

Where East meets West: in the house of individuation

The psychological process of individuation as experienced in Jungian work may lead to states of consciousness that resemble advanced spiritual developments across religious traditions and cultures. This is where Westerners may reach a common ground with the East. In the essentials and with respect to the final goal there is little difference among the many ways to the self, even if the cultural features in the landscape are disparate. In late stage Jungian analysis and individuation and in what Erich Neumann calls ‘centroversion’, the personal and the impersonal aspects of the personality accumulate around the ego‐self axis to form a composite identity. In this complex structure the ego does not vanish but is joined to the impersonal archetypal levels of the psyche and identity thus becomes at once individual and archetypal. This is the third stage of conjunction as described by Jung in Mysterium Coniunctionis and it is identical to the type of consciousness depicted in the final scenes of Zen Buddhism's Ten Ox‐Herding Pictures.     

A second type of magnitude effect: Reinforcer magnitude differentiates delay discounting between substance users and controls

Basic research on delay discounting, examining preference for smaller–sooner or larger–later reinforcers, has demonstrated a variety of findings of considerable generality. One of these, the magnitude effect, is the observation that individuals tend to exhibit greater preference for the immediate with smaller magnitude reinforcers. Delay discounting has also proved to be a useful marker of addiction, as demonstrated by the highly replicated finding of greater discounting rates in substance users compared to controls. However, some research on delay discounting rates in substance users, particularly research examining discounting of small‐magnitude reinforcers, has not found significant differences compared to controls. Here, we hypothesize that the magnitude effect could produce ceiling effects at small magnitudes, thus obscuring differences in delay discounting between groups. We examined differences in discounting between high‐risk substance users and controls over a broad range of magnitudes of monetary amounts ($0.10, $1.00, $10.00, $100.00, and $1000.00) in 116 Amazon Mechanical Turk workers. We found no significant differences in discounting rates between users and controls at the smallest reinforcer magnitudes ($0.10 and $1.00) and further found that differences became more pronounced as magnitudes increased. These results provide an understanding of a second form of the magnitude effect: That is, differences in discounting between populations can become more evident as a function of reinforcer magnitude.     

Body‐Weight Self‐Schema: Determinant of Mood and Behavior in Women With an Eating Disorder1

The schema approach to self‐concept was used to investigate the association between body‐weight self‐conception and self‐esteem, negative affect states, and disordered eating behavior in women with anorexia nervosa (n= 26) or bulimia nervosa (N= 53) using experience sampling methodology. We predicted that self‐esteem would be lower and unpleasant affect and disordered eating behaviors would be higher when the body‐weight self‐schema was activated in working memory compared to when non‐weight‐related self‐schemas were activated. Participants recorded the currently activated self‐schema, self‐esteem, affect, and behavior in response to an alarm‐watch signal 5 times daily for 5 days. Activation of the body‐weight self‐schema was associated with lower self‐esteem and higher negative affect, but not higher levels of disordered eating behavior. Low self‐esteem and negative affect, however, were associated with disordered eating behavior. Findings have important implications for treatment of eating disorders.     

AN INQUIRY INTO THE ORIGINS OF LIFE ON EARTH— A SYNTHESIS OF PROCESS THOUGHT IN SCIENCE AND THEOLOGY

An initiating event in the development of life on earth is thought to have been the generation of self‐replicating catalytic molecules (SRCMs). Despite decades of work to reveal how SRCMs could have formed, a chemically detailed hypothesis remains elusive. I maintain that this is due, in part, to a failure of metaphysics and question this research program's ontologic foundation of materialism. In this essay I suggest another worldview that may provide more adequate ontologic underpinnings: Whitehead's process philosophy of dynamic, relational becoming. Here we come to see molecules not as unchanging objects but rather as processes that possess the capacity for subjective experience. Molecular transformation is driven by experience, both internal and external. Process thought accounts for the world's creative impulse by positing a God who lures the becoming of all entities toward greater complexity and value. Chemical evolution is now seen as divine motivation of molecular becoming and, as such, possesses the potential for introducing true novelty into the world. The “causal joint” between God and world is hypothesized to be an energy transduction at the molecular level that allows divine action without violation of chemical principles or physical laws.     

Feasibility of a Telephone Intervention for HIV Patients and Their Informal Caregivers

Objectives: To assess the feasibility of a telephone intervention for HIV-positive patients and their caregivers. Methods: HIV-positive participants, some co-enrolled with their informal caregiver, enrolled in this randomized study. Intervention-arm participants (124 patients and 76 caregivers; dyads assigned to same arm) received up to 12 scheduled calls from an interventionist over 6 months. Results: An average of 7.6 (SD = 3.0) calls to each participant was completed; 66.5% received at least 6 calls; 43.0% received more than 75% of the intervention (defined as ‘study adherent’). Having a higher T-cell count was associated with call adherence (p = .014); cocaine use was associated with reduced call adherence for both patients (p = .019) and caregivers (p = .083). Common telephone themes included problems with mood, relationships, finances, housing, and work; interventions (e.g., referral for mental health care) were initiated in response to these. Participant satisfaction was high, and many reported benefits from the intervention. Conclusions: Using a telephone intervention with HIV-positive patients and their caregivers is a feasible and potentially beneficial intervention.