<p>Schizophrenia is a psychiatric disorder characterized by social dysfunction. People with schizophrenia misinterpret social information and it is suggested that this difficulty may result from visual processing deficits. As faces are one of the most important sources of social information it is hypothesized that people suffering from the disorder have impairments in the visual face processing system. It is unclear which mechanism of the face processing system is impaired but two types of deficits are most often proposed: a deficit in face perception in general (i.e., processing of facial features as such) and a deficit in facial emotion processing (i.e., recognition of emotional facial expressions). Due to the contradictory evidence from behavioural, electrophysiological as well as neuroimaging studies offering support for the involvement of one or the other deficit in schizophrenia it is early to make any conclusive statements as to the nature and level of impairment. Further studies are needed for a better understanding of the key mechanism and abnormalities underlying social dysfunction in schizophrenia.</p>

<p>The aim of this essay is to investigate how paranoid and non-paranoid schizophrenic patients differ in the processing of emotional facial expressions from healthy individuals, and how this could lead to deficits in the area of social cognition. Researchers have conducted many behavioral and neuroimaging studies on facial emotion processing and emotion recognition in schizophrenia. Several studies have shown that individuals with schizophrenia have deficits in recognizing and processing emotional facial stimuli. It is known that patients with different subtypes of schizophrenia also show differences in facial emotion processing. It has also been shown that patients with schizophrenia uses different strategies in the processing of emotional faces compared to healthy individuals.</p>

ADHD is a well researched disorder in children and is associated with impairments in social functioning (Barkley, 2006). However, little is known about the etiology of social difficulties. An emerging body of literature is beginning to address the possible role social cognition may share in the social functioning outcomes in children with ADHD (Buitelaar et al., 1999; Corbett & Glidden, 2000; DaFonseca et al., 2009; Rapport et al., 2002; Sibley et al., 2010; Yuill & Lyon, 2007). Yet, research focusing on social cognition deficits in ADHD that accounts for subtype differences is limited. Some studies evaluated social cognition in CT children only (Corbett & Glidden, 2000; DaFonseca et al., 2009; Rapport et al., 2002) while other research utilized behavior ratings or sociometric studies (Matthys et al., 1999; Zentall et al., 2001). Another body of literature has examined the impact executive functioning deficits may have on social functioning (Barkley, 1997; Charman et al., 2001; Chhabildas et al., 2001). The purpose of the current study was to identify factors that predict social functioning impairments in children with ADHD as well as differentiate between ADHD subtypes. Participants included 89 youth with ages ranging from 6 to 16 years (M = 10.19, SD = 2.76). Forty-nine children met the diagnostic criteria for ADHD, Predominantly Inattentive Subtype (PI) and 40 for ADHD, Combined Type (CT). Results indicated CT youth demonstrated more aggressive and rule-breaking behavior than PI youth. Measures of social cognition did not predict ADHD subtype, and when compared to a normative sample, participants performed in the average range on affect recognition and theory of mind tasks. Performance-based measures of executive functioning largely associated with inattention (i.e., vigilance, processing speed, and working memory) best predicted subtype differences with CT youth being more impaired. Executive functioning, not social cognition, was predictive of social maladjustment in CT and PI youth. For CT youth, deficits in emotion control, shift, and initiate were related to anxiety, aggressive behavior, and depressed mood. Similarly, emotion control and shift were predictors of aggressive behavior, anxiety, and depressed mood in PI youth with deficits in self-monitoring, initiate, and inhibit as secondary predictors. / text

The present mixed-methods study examined adolescents’ social perspective taking in contexts of social justice as demonstrated by their awareness and interpretations of hypothetical peer interactions depicting racism and sexism. Fifty adolescents in Grades 9 and 12 participated in a semi-structured interview in which they were presented with two scenarios, involving adolescents in conflicts portraying racism and sexism. They were asked a series of questions designed to elicit their awareness and understanding of social group differences. Qualitative analyses revealed three categories of adolescents’ responses, reflecting distinct interpretations of social group differences. On average, adolescents assumed a perspective that was naïve to the disparities existing between vulnerable and less vulnerable social groups. Furthermore, it was shown that older adolescents had significantly more sophisticated social justice understandings than younger adolescents. These findings highlight the need to educate adolescents about issues of social justice and facilitate an appreciation of social group differences.

We examined the spatiotemporal dynamics underlying the processing of a false belief task using magnetoencephalography (MEG). Twenty adults performed a false belief task adapted for MEG. Regions of interest were selected based on source analyses on the contrast between false and true belief, and MEG source time-course reconstructions were generated and analyzed to determine the temporal architecture of neural activations specific to false belief reasoning. We found frontal, temporal and parietal regions to activate during false belief processing, confirming prior findings. We also extend previous findings by adding information about the temporal profile of neural activity during theory of mind processing, an area lacking in the literature. We found that increased frontal activity began at 100 ms bilaterally, followed by parietal regions from 200 to 330 ms and temporal regions at 350 ms, at which point frontal activity became lateralized to the right hemisphere.

Prosocial behaviours are a diverse group of actions that are integral to human social life. In this dissertation I propose and test a three-factor model of prosocial behaviour. Specifically, in a series of four studies I examined the ability of infants and toddlers to engage in helping, sharing, and comforting behaviour. Additionally, I examine the consistency with which children produce these behaviours longitudinally over time and the associations between these three subtypes of prosocial behaviour and social cognitive perspective taking, effortful control, affective perspective taking, and temperament. In Study 1, I found that 18-month-old infants were able to engage in helping and sharing, but not comforting behaviour. In Study 2, I found that between 18 and 30 months, there was no individual consistency in the production of prosocial behaviours, either across types (helping, sharing) or times (18, 24, or 30 months). Moreover, I found that even at 30 months of age, young children were not recognizing and responding to the emotional needs of others. In Study 3, I examined the relation between helping and sharing and three measures of social cognitive perspective taking and general cognitive development. I found unique relations between the behavioural correlates and the measures of prosocial behaviour. Specifically, I found that sharing was associated with imitation and that helping was associated with general cognitive development. Finally, Study 4 demonstrated that helping was the most frequent prosocial behaviour that the children engaged in, and it did not increase over time. I also observed a significant developmental increase in comforting behaviour from 2 to 3 years. Additionally, I found low rates of sharing behaviour that were stable over time. Importantly, I observed consistency in the production of prosocial behaviour within each subtype and defined a three-factor structure that differentiated between the helping, sharing, and comforting tasks. Further, I observed a significant association between effortful control and comforting behaviour, but no other significant associations between any of the subtypes of prosocial behaviour and the behavioural correlates (effortful control, affective perspective taking, and temperament). The implications for the construct of prosocial behaviour and the presence of a “prosocial disposition” are discussed. / Thesis (Ph.D, Psychology) -- Queen's University, 2010-09-20 15:08:27.842

We examined the spatiotemporal dynamics underlying the processing of a false belief task using magnetoencephalography (MEG). Twenty adults performed a false belief task adapted for MEG. Regions of interest were selected based on source analyses on the contrast between false and true belief, and MEG source time-course reconstructions were generated and analyzed to determine the temporal architecture of neural activations specific to false belief reasoning. We found frontal, temporal and parietal regions to activate during false belief processing, confirming prior findings. We also extend previous findings by adding information about the temporal profile of neural activity during theory of mind processing, an area lacking in the literature. We found that increased frontal activity began at 100 ms bilaterally, followed by parietal regions from 200 to 330 ms and temporal regions at 350 ms, at which point frontal activity became lateralized to the right hemisphere.

The present mixed-methods study examined adolescents’ social perspective taking in contexts of social justice as demonstrated by their awareness and interpretations of hypothetical peer interactions depicting racism and sexism. Fifty adolescents in Grades 9 and 12 participated in a semi-structured interview in which they were presented with two scenarios, involving adolescents in conflicts portraying racism and sexism. They were asked a series of questions designed to elicit their awareness and understanding of social group differences. Qualitative analyses revealed three categories of adolescents’ responses, reflecting distinct interpretations of social group differences. On average, adolescents assumed a perspective that was naïve to the disparities existing between vulnerable and less vulnerable social groups. Furthermore, it was shown that older adolescents had significantly more sophisticated social justice understandings than younger adolescents. These findings highlight the need to educate adolescents about issues of social justice and facilitate an appreciation of social group differences.

By 18 months children demonstrate a range of social-cognitive skills that reflect their emerging capacity to understand and engage in intentional relations with others. Intention understanding is a critical component of children’s social cognition at this age. Although individual differences in social cognition have been linked to neurocognitive maturation, socio-cultural models of development suggest that environmental influences operate in the development of intention understanding, with distal factors operating through proximal processes. In the current study of 501 children and their mothers, we tested and found support for a model in which an accumulation of distal environmental risks was associated with lower maternal responsivity, which was in turn associated with lower social-cognitive competency at 18 months. In addition, part of this effect operated through children’s concurrent language ability. Findings are discussed with respect to the Vygotskian themes of internalization and semiotic mediation.

By 18 months children demonstrate a range of social-cognitive skills that reflect their emerging capacity to understand and engage in intentional relations with others. Intention understanding is a critical component of children’s social cognition at this age. Although individual differences in social cognition have been linked to neurocognitive maturation, socio-cultural models of development suggest that environmental influences operate in the development of intention understanding, with distal factors operating through proximal processes. In the current study of 501 children and their mothers, we tested and found support for a model in which an accumulation of distal environmental risks was associated with lower maternal responsivity, which was in turn associated with lower social-cognitive competency at 18 months. In addition, part of this effect operated through children’s concurrent language ability. Findings are discussed with respect to the Vygotskian themes of internalization and semiotic mediation.