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Group coordination is a universal feature of social life. Animals form social groups for a variety of reasons, including predator evasion and more efficient foraging, and individuals living in social groups must coordinate their activities in order for groups to function. Consequently, the factors that facilitate or impede group coordination are of great interest in understanding the lives of social animals. Familiarity between individuals has well-documented effects on group coordination, with familiar groups outperforming unfamiliar ones in predator evasion, foraging, and cohesion. Individuals also generally prefer to coordinate with familiar conspecifics over unfamiliar ones. Despite these advantages, the mechanisms through which familiarity might aid group coordination are poorly understood. Similarly, the individual personalities of group members have well-documented effects on group performance: bold individuals are more likely to be 'leaders' and determine the direction of group movements, and groups comprised of individuals of differing personalities outperform groups of all bold or all shy individuals. While the effect of individual personalities on group behaviour has been recorded extensively, the ways in which individuals affect each other's behaviour are still poorly documented. In particular, active interactions where one individual can directly affect the behaviour of others have received limited attention, as it is difficult to distinguish such actions from passive effects. I used two systems to investigate how individual behaviours can lead to group coordination. In three-spined sticklebacks (Gasterosteus aculeatus), well-established boldness assays allowed me to assess the effects of personality and familiarity on 1) coordination between pairs of fish; I found that individuals in unfamiliar pairs exhibited coordination patterns consistent with their individual personalities, with bold individuals more likely to leave cover independently, while in familiar pairs, individuals behaved in ways seemingly unrelated to their boldness scores. I also investigated how personality and familiarity affect 2) group coordination and individual performance in a problem-solving paradigm. I found that familiarity, relative individual personality, and group mean personality interact to affect individual foraging success, and that group cohesion was affected by the interaction of group familiarity and group mean personality. These results suggest that individual characteristics can impact the behaviour of groups, and that the characteristics of an individual's group can in turn affect an individual's behaviour and success. In the Bronze Cory catfish (Corydoras aeneus), I described a novel tactile interaction style termed 'nudging' that individuals use during group coordination. I investigated 3) the effect of familiarity on nudging and coordination in pairs and triplets. These results show that nudging can be used to overcome the disadvantages of familiarity, which has important implications for how communication can underlie group coordination in the absence of familiarity. I then investigated how 4) nudging affects group coordination following a flight response to a potential threat. I demonstrated that nudging leads to a higher likelihood of group cohesion and longer group flight times. This shows how active interactions can mediate group responses and affect the ecologically relevant scenario of predator evasion. Finally, I investigated 5) the development of this nudging behaviour. My results show that Bronze Cory catfish larvae develop toleration for tactile stimulation with age alongside their propensity to nudge conspecifics. This suggests that Bronze Cory catfish larvae require social feedback to develop appropriate responses to nudges from conspecifics and supports the important role of nudging in Bronze Cory catfish sociality. The presence of active interactions in the Bronze Cory catfish` modifies the way that social behaviour manifests in this species and has great potential for further questions about social behaviour and group functioning.

The current studies addressed two questions regarding early social behaviour in children with Autism Spectrum Disorders (ASD) that have not yet been directly explored. In Study 1 we examined the hypothesis that impaired imitation in this group may reflect a diminished social motivation to engage, rather than a core deficit in imitation. Young children with and without ASD engaged in imitation tasks during which controlled manipulations of reward (social and non-social) were administered for target behaviours. Children with ASD displayed increased levels of imitation with the incentive of an external reward in comparison to when this reward was absent. There was no differential impact of social versus non-social rewards. Typically developing (TD) children performed similarly, irrespective of whether or not reward was administered. We suggest that young children with ASD may be capable of imitating when appropriate incentives are present. Study 2 explored the breadth of social challenges faced in young children with ASD by examining a later-developing domain of social functioning that may be compromised by early social difficulties. We explored the tendency of children with ASD to engage in helping, sharing, and comforting behaviour in situations where the need for the prosocial behaviour was displayed and in perceptually similar situations where the need was absent. Children with ASD displayed low levels of helping and sharing, but provided comfort at levels consistent with TD children. For both comforting and sharing, children with ASD successfully discerned situations where a need was present from when it was not and adjusted their behaviour accordingly. We suggest that children with ASD may require different ‘conditions’ to engage in social behaviours at the same level as their TD peers and suggest future research to this end. / Thesis (Ph.D, Psychology) -- Queen's University, 2012-09-27 22:10:12.095

Purpose: The primary aim of this thesis was to examine two aspects of early child development, namely emergent literacy skills and social-behavioural development. An examination of these two aspects of development occurs at the within child-level factor and the within-family level factor. Specifically, we seek to examine the effects of the family literacy environment in predicting 4-year-old children’s emergent literacy skills at entry to Junior Kindergarten. Additionally we seek to examine the interrelationships between children’s social behaviours and phonological awareness skills across the academic year. The final aim was to examine the relationship between teacher report and direct observations of children’s social behaviours. Method: One hundred and two children (52 boys, 50 girls) were recruited from 11 schools serving low-income neighbourhoods in a large metropolitan city and were assessed at the beginning and end of the Junior Kindergarten year. Family literacy questionnaires were collected at the beginning of the year. All children completed standardized assessments of their expressive vocabulary, non-verbal IQ, and phonological awareness skills. In addition, teachers completed behavioral ratings for all children. Results: The results of hierarchical multiple regression analyses revealed that direct teaching of letters/sounds in the home contributed 8% of the variance in children’s alphabet knowledge. The results also revealed that being excluded by peers at entry to Junior Kindergarten contributed up to 3% of the variance in negatively predicting phonological awareness outcomes at the end of the year. Further, the results revealed that poorer phonological awareness skills at the beginning of the year contributed up to 5% of the variance in predicting children’s preference for solitary behaviours at the end of the year. Finally, significant relationships were found between teacher report and direct observations for certain classroom behaviours. Conclusions: The results of this study suggest that the family literacy environment can play a positive role in children’s acquisition of emergent literacy skills prior to entry into formal schooling. The results also suggest that exclusion by peers may play a negative role in children’s ease of academic skill attainment. Conversely, the results suggest that the academic skill level that children enter into formal schooling with may play a role in their social behavioural competency in a classroom setting.

Purpose: The primary aim of this thesis was to examine two aspects of early child development, namely emergent literacy skills and social-behavioural development. An examination of these two aspects of development occurs at the within child-level factor and the within-family level factor. Specifically, we seek to examine the effects of the family literacy environment in predicting 4-year-old children’s emergent literacy skills at entry to Junior Kindergarten. Additionally we seek to examine the interrelationships between children’s social behaviours and phonological awareness skills across the academic year. The final aim was to examine the relationship between teacher report and direct observations of children’s social behaviours. Method: One hundred and two children (52 boys, 50 girls) were recruited from 11 schools serving low-income neighbourhoods in a large metropolitan city and were assessed at the beginning and end of the Junior Kindergarten year. Family literacy questionnaires were collected at the beginning of the year. All children completed standardized assessments of their expressive vocabulary, non-verbal IQ, and phonological awareness skills. In addition, teachers completed behavioral ratings for all children. Results: The results of hierarchical multiple regression analyses revealed that direct teaching of letters/sounds in the home contributed 8% of the variance in children’s alphabet knowledge. The results also revealed that being excluded by peers at entry to Junior Kindergarten contributed up to 3% of the variance in negatively predicting phonological awareness outcomes at the end of the year. Further, the results revealed that poorer phonological awareness skills at the beginning of the year contributed up to 5% of the variance in predicting children’s preference for solitary behaviours at the end of the year. Finally, significant relationships were found between teacher report and direct observations for certain classroom behaviours. Conclusions: The results of this study suggest that the family literacy environment can play a positive role in children’s acquisition of emergent literacy skills prior to entry into formal schooling. The results also suggest that exclusion by peers may play a negative role in children’s ease of academic skill attainment. Conversely, the results suggest that the academic skill level that children enter into formal schooling with may play a role in their social behavioural competency in a classroom setting.

Thesis (B.Sc.Hons.) -- University of Adelaide, Department of Psychology, 1972.