A biologically based model for recognition of 2-D occluded patterns

In this work, we present a biologically inspired model for recognition of occluded patterns. The general architecture of the model is based on the two visual information processing pathways of the human visual system, i.e. the ventral and the dorsal pathways. The proposed hierarchically structured model consists of three parallel processing channels. The main channel learns invariant representations of the input patterns and is responsible for pattern recognition task. But, it is limited to process one pattern at a time. The direct channel represents the biologically based direct connection from the lower to the higher processing level in the human visual cortex. It computes rapid top-down pattern-specific cues to modulate processing in the other two channels. The spatial channel mimics the dorsal pathway of the visual cortex. It generates a combined saliency map of the input patterns and, later, segments the part of the map representing the occluded pattern. This segmentation process is based on our hypothesis that the dorsal pathway, in addition to encoding spatial properties, encodes the shape representations of the patterns as well. The lateral interaction between the main and the spatial channels at appropriate processing levels and top-down, pattern-specific modulation of the these two channels by the direct channel strengthen the locations and features representing the occluded pattern. Consequently, occluded patterns become focus of attention in the ventral channel and also the pattern selected for further processing along this channel for final recognition.     

Alston's Anti‐Justificationism as a Strategy to Resolve the Conflict Between Internalism and Externalism

After a justificationist period, William P. Alston has tried to eliminate justification from the epistemology of belief. He introduced a list of epistemic desiderata all of which contribute to the positive status of beliefs and none of which has an exclusive and decisive role so that it could be isolated as the property of being justified. Careful examination reveals, however, that this list includes fewer desiderata than advertised. Truth‐conducive desiderata are most important for Alston, and these are five; during his discussion, however, Alston reduces these desiderata to only one, the reliability of process, which has an externalist character. Besides this desideratum, there is one other group of desiderata, all of which have an internalist character. What Alston has in fact done, then, through the presentation of his anti‐justificationist list, is to separate externalist and internalist elements for the positive status of belief and to give an independent role to each. Since Alston regards the truth‐conducive group as the most important, however, and since he has failed to show a real pluralism in this group, we may conclude that he continues to have a monistic approach to the evaluation of beliefs, which belies his alleged pluralism.     

The impact of a laryngectomy on the spouse: Who is better off?

Background: Diabetes self-care is a key element in the overall management of diabetes. However, the importance of psychosocial factors for successful disease management is under investigated. This study aimed at exploring the role of coping styles and social support in the relationship between self-care activities and glycated haemoglobin in patients with type 2 diabetes.

Methods: One hundred adults (60% female, aged 40–70 years) with type 2 diabetes completed questionnaires assessing self-care activities, coping styles and social support. In addition, a blood test was performed to obtain glycated haemoglobin levels.

Results: Result showed significant relationships of glycated haemoglobin with self-care activities, coping styles and social support. Regression analysis indicated that social support had a moderating role on the relationship between self-care activities and glycated haemoglobin, such that, at very high levels of social support the association, between Self-Care and HbA1c disappears.

Conclusions: Findings indicate that health care providers, within the context of the Iranian social and cultural situation, should pay more attention to psychosocial factors when addressing self-care activities. Delineation of the role of coping styles and social support might be useful for identifying patients in need of particular counselling and support for improving self-care activities and HbA1c levels.     

Gratitude and mental health: differences between religious and general gratitude in a Muslim context

The present study examined the relation of religious gratitude and dispositional gratitude with mental health, subjective well-being and personality among a sample of 256 Iranian students. The two types of gratitude were associated with higher levels of mental health and well-being. Agreeableness and Conscientiousness were the strongest personality correlates of both types of gratitude. Dispositional gratitude showed stronger relationship with mental health, subjective well-being and personality factors. Dispositional gratitude also out-predicted the religious gratitude in relation with mental health and subjective well-being, showing that religious gratitude compared to dispositional gratitude has less effect on mental health and well-being.     

Insecure Attachment and Subclinical Depression,Anxiety, and Stress: A Three-Dimensional Model of Personality Self-Regulation As a Mediator

Although the effects of insecure attachment on vulnerability, incidence, and developing mental disorders have been confirmed by many studies, the mechanism of this effect is still unknown. Therefore, the main aim of this study was to investigate the mediating and moderating role of the three-dimensional model of personality self-regulation in the relationship between insecure attachment and subclinical depression, anxiety, and stress. Four hundred Iranian students at Shiraz University were recruited and completed the following scales: the Revised Adult Attachment, Depression Anxiety Stress, Integrative Self-Knowledge, Mindful Attention Awareness, Self-Control, and Self-Compassion. Results showed that there was a moderate correlation among all the variables under study in the expected directions. Multiple mediating models analyses indicated that regarding the relationship between insecure attachment and depression, the components of integrative self-knowledge, self-control, and self-compassion functioned as mediators. However, regarding the relationship between insecure attachment and anxiety and stress, the components of integrative self-knowledge, mindfulness, and self-compassion relatively functioned as mediators. Further, our results showed that only mindfulness and self-compassion were identified as moderators in the relationship between insecure attachment and depression. It is concluded that insecure attachment may cause psychological damage due to deficiency in the components of the three-dimensional model of personality self-regulation, and that mindfulness and self-compassion may play a protective role in the relationship between insecure attachment and depression.     

The Impact of Religious Connectedness on Health-Related Quality of Life in Patients with Diabetic Foot Ulcers

Religious connectedness is common phenomenon in Saudi Arabia and adjacent Gulf countries. An observational case control study was designed, enrolling 180 adult patients to report the association between religious connectedness and health-related quality of life (HRQL) in people with and without diabetes and foot ulcers. Sixty diabetic patients with foot ulcers (Group I) were compared with sixty diabetic patients without foot ulcer (Group II) and sixty healthy subjects (Group III) for assessment of their HRQL by using SF-36 questionnaire. The effect of religious connectedness was assessed using intrinsic/extrinsic religious connectedness scale. HRQL was found to be significantly lower in Group I compared with Group II and III as well as in group II compared with group III (P < 0.001). Group I patients showed a poorer HRQL with increased severity, duration and multiplicity of foot ulcers. There was a strong positive relationship between religious connectedness and HRQL as indicated by a positive correlation between religious connectedness scale and mental, physical component summary scores (r = 0.66 and 0.59 respectively and P < 0.001). While quality of life is generally poor in people with diabetic foot ulcers, there exists a strong positive relationship between religious connectedness and higher HRQL. These findings may have implications on improving outcomes.     

Sunday School Student and Theological Fatalism

I will briefly argue that theological fatalism is not a genuine ‘theological’ problem, for it can be reduced to another alleged incompatibility that arises independently of the existence or non-existence of God. I will conclude that the way of arguing against the existence of God or His omniscience by appealing to theological fatalism is blocked for libertarian atheists.     

A model of amygdala–hippocampal–prefrontal interaction in fear conditioning and extinction in animals

Empirical research has shown that the amygdala, hippocampus, and ventromedial prefrontal cortex (vmPFC) are involved in fear conditioning. However, the functional contribution of each brain area and the nature of their interactions are not clearly understood. Here, we extend existing neural network models of the functional roles of the hippocampus in classical conditioning to include interactions with the amygdala and prefrontal cortex. We apply the model to fear conditioning, in which animals learn physiological (e.g. heart rate) and behavioral (e.g. freezing) responses to stimuli that have been paired with a highly aversive event (e.g. electrical shock). The key feature of our model is that learning of these conditioned responses in the central nucleus of the amygdala is modulated by two separate processes, one from basolateral amygdala and signaling a positive prediction error, and one from the vmPFC, via the intercalated cells of the amygdala, and signaling a negative prediction error. In addition, we propose that hippocampal input to both vmPFC and basolateral amygdala is essential for contextual modulation of fear acquisition and extinction. The model is sufficient to account for a body of data from various animal fear conditioning paradigms, including acquisition, extinction, reacquisition, and context specificity effects. Consistent with studies on lesioned animals, our model shows that damage to the vmPFC impairs extinction, while damage to the hippocampus impairs extinction in a different context (e.g., a different conditioning chamber from that used in initial training in animal experiments). We also discuss model limitations and predictions, including the effects of number of training trials on fear conditioning.     

Intrinsic motivation, extrinsic motivation, and learning English as a foreign language

The objective of this study was to examine the relationships of amotivation, extrinsic motivation, and intrinsic motivation with learning the English language. The 230 Iranian students at Shiraz University were tested using the Language Learning Orientations Scales to measure Amotivation, Extrinsic Motivation, and Intrinsic Motivation as explanatory variables. Grade point average in English exams was selected as a measure of English learning Achievement. Multiple regression analysis revealed that learning Achievement scores were predicted by scores on the Amotivation subscale, Introjected Regulation subscale, Knowledge subscale, and Stimulation subscale, whereas, the External and Identified Regulation and Accomplishment subscales did not have a significant relationship with Achievement. The results are discussed in terms of differences in Iranian context and culture.