How to use the diffusion model: Parameter recovery of three methods: EZ, fast-dm, and DMAT

Parameter recovery of three different implementations of the Ratcliff diffusion model was investigated: the EZ model (Wagenmakers, van der Maas, & Grasman, 2007), fast-dm (Voss & Voss, 2007), and DMAT (Vandekerckhove & Tuerlinckx, 2007). Their capacity to recover both the mean structure and individual differences in parameter values was explored. The three methods were applied to simulated data generated by the diffusion model, by the leaky, competing accumulator (LCA) model (Usher & McClelland, 2001) and by the linear ballistic accumulator (LBA) model (Brown & Heathcote, 2008). Results show that EZ and DMAT are better capable than fast-dm in recovering experimental effects on parameters. EZ was best in recovering individual differences in parameter values. When data were generated by the LCA model, the diffusion model estimates obtained with all three methods correlated well with corresponding LCA model parameters. No such one-on-one correspondence could be established between parameters of the LBA model and the diffusion model.     

Dietary patterns and intelligence in early and middle childhood

The association between intelligence and diet at 3.5 and 7 years was examined in 591 children of European descent. Approximately half of the children were born small-for-gestational age (birth weight ≤ 10th percentile). The relationship between IQ and diet (measured by food frequency) was investigated using multiple regression analyses. Eating margarine at least daily was associated with significantly lower IQ scores at 3.5 years in the total sample and at 7 years in SGA children. For all children, eating the recommended daily number of breads and cereals was associated with significantly higher IQ scores at 3.5 years, and those who ate fish at least weekly had significantly higher IQ scores at 7 years than those who did not. The consumption of fish, breads and cereals commeasurable with nutritional guidelines may be beneficial to children's cognitive development. In contrast, consuming margarine daily was associated with poorer cognitive functioning. Further research is needed to identify the nutrients that may underlie this association.     

From da Vinci to CAD and beyond

Here what I would like to accomplish is to set something of the stage from which the growing recognition of what I shall now term technoscience’s visualism—a term which can accommodate both sciences and engineering, and both imaging and design practices—takes its recognition. I shall very briefly look at the ‘godfathers and peers’ who help set this stage, and then proceed to an examination of a few moments in the development of visualism from da Vinci to computer assisted design (CAD) and beyond.     

Cerebellar Contributions to Proactive and Reactive Control in the Stop Signal Task: A Systematic Review and Meta-Analysis of Functional Magnetic Resonance Imaging Studies

Neuropsychology Review - The cerebellum facilitates and modulates cognitive functions using forward and inverse internal models to predict and control behavior, respectively. Despite neuroimaging...     

Internalized transphobia and mental health among transgender adults: A nationwide cross-sectional survey in South Korea

Abstract

Introduction: Transgender people are stigmatized in South Korea (hereafter Korea), where cultural expectations of a biologically-based, binary sex and gender system present fundamental challenges to those whose gender identity does not align with their birth-assigned sex. A growing international body of literature implicates gender minority stress as a key contributor to transgender mental health disparities, but little research has been conducted on this topic in Korea. As in other cultural settings, depression and suicidality are urgent public health concerns for transgender people in Korea, primarily for those who have not initiated gender affirming medical treatment (GAMT), such as cross-sex hormone therapy. In the current study, an international and interdisciplinary team of authors apply the lens of gender minority stress to elucidate the relationships between a key facet of gender minority stress, internalized transphobia (ITP), and outcomes of depressive symptoms and suicidality.

Methods: Based on a cross-sectional survey of 207 Korean transgender adults, the current study evaluates the relationships between ITP and depressive symptoms, suicidal ideation, and suicide attempts. ITP was measured with an eight-item, Korean-language questionnaire adapted from the Gender Minority Stress and Resilience Measure through a translation and back-translation process.

Results: Korean trans women and trans men mean (mean age?=?26.4) were included in the analysis, most of whom had at least one experience of any GAMT. The findings of this study show that Korean transgender adults face similar public health concerns such as high prevalence of depressive symptoms, suicidal ideation, and suicide attempts. As predicted, ITP was significantly related to depressive symptoms, suicidal ideation, and suicide attempts.

Conclusion: The authors suggest potential clinical, policy, and research applications, including institutional interventions, to address structural and cultural barriers to optimal mental health and GAMT as well as mental health interventions to reduce Korean transgender people’s internalized negative beliefs about their gender identity.     

Sensory information affords exploration of posture in newly walking infants and toddlers

The development of posture and locomotion provides a valuable window for understanding the ontogeny of perception-action relations. In this study, 13 infants were examined cross-sectionally while standing quietly either hands-free or while lightly touching a contact surface. Mean sway amplitude results indicate that infants use light touch for sway attenuation (≈28–40%) as has been seen previously with adults (Jeka & Lackner, 1994). Additionally, while using the contact surface, movement patterns of the head and trunk show reduced temporal coordination (≈25–40%), as well as increased temporal variability, as compared to no touch conditions. These findings are discussed with regard to the ontogeny of perception-action relations, with the overall conclusion that infants use somatosensory information in an exploratory manner to aid in the development of an accurate internal model of upright postural control.     

Charitable giving among the foreign-born in Canada

This article focuses on the patterns of charitable giving among the foreign-born in Canada. Using Joseph's (1995) “spectrum of philanthropy” model, we generated four general empirical predictions that were explored with Canadian data. The sample used for the analysis were 18,301 Canadian and foreign-born respondents drawn from the National Survey of Giving, Volunteering and Participating. All four predictions were supported by the survey data. Substantial variations in the propensities to give were found among immigrant groups in terms of their birthplaces, socio-demographic, and residential characteristics. Some segments of the immigrant population displayed higher propensities to give than those who were Canadian-born. As the length of residence increased, the average contributions of the foreign-born increased but with some changes in their underlying motivations and organizational preferences. Religion-related motivations declined some-what over time. Although religious organizations were always preferred throughout the immigrant integration process, it was found that more secular organizations (i.e., health-and social services-related) received more support at the latter stages of this process.     

Orisha Worship Communities: A Reconsideration of Organisational Structure

It is commonly understood by both scholars and practitioners of Yoruba religion in the Americas that initiates in Africa worship only one or two Orisha, whereas in the New World each individual worships multiple Orisha. However, an analysis of both textual and visual sources points to a more complex religious environment among the Yoruba in their homeland. It is suggested that the innovations found in the New World were less radical than received wisdom indicates. In addition, such research challenges the assumption that the form of New World Orisha worship is a consequence of colonial oppression and suggests instead that it is based on existing African antecedents.     

Effects of some physiological and pharmacological manipulations on shock- facilitated mouse killing by onychomys leucogaster (Northern grasshopper mouse)

Onychomys leucogaster (northern grasshopper mice) were induced to kill mice with response-contingent shock, and the effects of several physiological, pharmacological, and endocrinological variables were assessed. Lesions of the septum facilitated mouse killing, while lesions of the amygdala abolished spontaneous mouse killing and delayed shock-facilitated killing. Chlorpromazine (2.5–5 mg/kg) and chlordiazepoxide (5–10 mg/kg) facilitated mouse killing on postdrug trials but did not affect killing when the animals were drugged. Adrenalectomy, castration, and castration adrenalectomy did not alter the frequency of kill nor were sex-related differences in killing noted. These results were compared to those found by others studying the effects of lesions and drugs on mouse killing by rats.