The role of crowding in parallel search: Peripheral pooling is not responsible for logarithmic efficiency in parallel search

Recent results from our laboratory showed that, in fixed-target parallel search tasks, reaction times increase in a logarithmic fashion with set size, and the slope of this logarithmic function is modulated by lure-target similarity. These results were interpreted as being consistent with a processing architecture where early vision (stage one) processes elements in the display in exhaustive fashion with unlimited capacity and with a limitation in resolution. Here, we evaluate the contribution of crowding to our recent logarithmic search slope findings, considering the possibility that peripheral pooling of features (as observed in crowding) may be responsible for logarithmic efficiency. Factors known to affect the strength of crowding were varied, specifically: item spacing and similarity. The results from three experiments converge on the same pattern of results: reaction times increased logarithmically with set size and were modulated by lure-target similarity even when crowding was minimized within displays through an inter-item spacing manipulation. Furthermore, we found logarithmic search efficiencies were overall improved in displays where crowding was minimized compared to displays where crowding was possible. The findings from these three experiments suggest logarithmic efficiency in efficient search is not the result peripheral pooling of features. That said, the presence of crowding does tend to reduce search efficiency, even in “pop-out” search situations.     

Exploring Gender Wage Disparity in MFT Academic Programs

This study tested whether there was a significant salary difference between women and men working as faculty in Marriage and Family Therapy (MFT) programs within public universities. Additionally, we evaluated whether there were significant differences in academic attributes and how these academic attributes related to gender differences in salary. Results from our Oaxaca decomposition of salary differentials showed academic attributes like the number of peer-reviewed publications and years in academia could be used to explain the $9000 gap found between women and men in our sample of MFT academics. Our results indicated no evidence of salary discrimination against women working as MFT faculty members but showed that women were shown to have significantly less time in academia and to publish significantly fewer peer-reviewed journal articles than men. Implications of the current study findings include developing effective mechanisms for helping women persist in and advance through pathways of MFT academic promotion as well as for helping increase their scholarly productivity.     

Religious Identity,Expression, and Civility in Social Media: Results of Data Mining Latter‐Day Saint Twitter Accounts

This study explores religious self‐identification, religious expression, and civility among projected Latter‐Day Saint Twitter accounts (201,107 accounts and 1,542,229 tweets). Novel methods of data collection and analysis were utilized to test hypotheses related to religious identity and civility against social media data at a large scale. Results indicated that (1) projected LDS Twitter accounts tended to represent authentic (rather than anonymous or pseudonymous) identities; (2) local minority versus majority status did not influence users’ willingness to religiously self‐identify; (3) isolation stigma did not occur when users religiously self‐identified; (4) participants exhibited much lower degrees of incivility than was anticipated from previous studies; and (5) religious self‐identification was connected to improved civility. Results should be of interest to scholars of religion for better understanding participation patterns and religious identity among Latter‐Day Saints and for exploring how these results may transfer to other groups of religious people.     

Why do High IQ Societies Differ in Intellectual Achievement? The Role of Schizophrenia and Left-Handedness in Per Capita Scientific Publications and Nobel Prizes

Previous research has attempted to understand why countries with relatively favorable conditions and high estimated average IQs (such as Finland and Japan) have a relatively low per capita number of scientific Nobel prizes. In the present study, we examine whether there is a relationship between national schizophrenia and left-handedness prevalence, on the one hand, and per capita scientific and literary achievement, on the other hand, in countries with IQ estimates of at least 90. We found that per capita science and literature Nobel prizes and scientific publications are strongly negatively associated with schizophrenia and strongly positively correlated with left-handedness. There also was a very pronounced negative correlation between schizophrenia rate and left-handedness rate. These results suggest that genius can be regarded as a combination of very high IQ, aspects of high-functioning autism (specifically low empathy) plus relatively low impulse control, consistent with observations of intellectually outstanding individuals, and the fact that schizophrenia appears to constitute the opposite pole of these aspects of autism spectrum. We posit differences in androgen levels as a possible underlying explanation for these findings.     

Confirmatory Factor Analysis of the Structure of Adult ADHD Symptoms

Previous research has examined the factor structure of ADHD symptoms in adults using confirmatory factor analysis and there is mixed support for two-factor, three-factor, or more complex bifactor models. The current study re-examines these factor structures on the basis of not only overall model fit, but also criteria such as chi-square difference tests, invariance, reliability, and validity. Three datasets were pooled to form a total sample of 430 adults (50% female). Participants completed questionnaires assessing their ADHD symptoms, education, psychopathology, and parenting (the latter as validity variables). Although the bifactor models demonstrated the best fit, the reliability and construct replicability of specific factors in these models was poor. The three-factor model had good fit and demonstrated good reliability, validity, construct replicability, and some invariance across gender and dataset. Our results replicate previous studies that find superior fit for bifactor models. However, the superior statistical fit may reflect only the increased complexity of these models. The more parsimonious three-factor model may demonstrate stronger validity and clinical utility.     

Inequalities in health, inequalities in health care: four generations of discussion about justice and cost-effectiveness analysis

The focus of questions of justice in health policy has shifted during the last 20 years, beginning with questions about rights to health care, and then, by the late 1980s, turning to issues of rationing. More recently, attention has focused on alternatives to cost-effectiveness analysis. In addition, health inequalities, and not just inequalities in access to health care, have become the subject of moral analysis. This article examines how such trends have transformed the philosophical landscape and encouraged some in bioethics to seek guidance on normative questions from outside of the contours of traditional philosophical arguments about justice.