Thesis (Ph.D.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / The purpose of this study was to investigate tue effects of prolonged deficit in one sense modality (vision) on the development of perception in another sense modality (tactile-kinesthesis). Specifically, the absence of vision from early in life was hypothesized as having a retarding effect on the development of perception in the tactile-kinesthetic sense. A total of 244 children served as the subjects for the study: 144 children with normal vision and 100 congenitally blind children. They ranged in age from five through sixteen years. The two groups were matched for chronological age and verbal IQ. In order to investigate the hypothesis of developmental retardation, it was decided to look at performance in a tactile-kinesthetic task in which there were systematic changes w1th age. Part of the study was tnus concerned with establishing norms for such a task. Two types of tactile-kinesthetic tasks were individually administered to all subjects: a test of kinesthetic after-effect; and the size-weight illusion, administered in three different forms. In both sighted and congenitally blind subjects, significant differences with age were found in two out of the three forms of the size-weight illusion (the two measures involving the simultaneous use of both hands). In the third form (involving the use of only one hand), significant differences with age were found in the blind population and, while the differences with age in the sighted population were not significant, there was a graphic indication that systematic changes with age were taking place similar to those found in the other two forms of the illusion. [TRUNCATED] / 2999-01-01

<p> The present collection of studies examines how sensory information is interrelated, and how that changes with age and experience. The hypotheses motivating the research were based on the sensory associations of adults who experience concrete inter/intra-sensory linkage, known as synesthesia. Adult synesthesia can inform the study of perceptual development, and even of language, because it appears to represent one way in which normal developmental mechanisms can play out. Using insights gained from adults with synesthesia, we derived novel hypotheses about cross-modal and cross-dimensional links likely to be present in early childhood and to persist in muted form in non-synesthetic adults.</p> <p> The research reported in Chapters 2 and 3 was an examination of the learned and naturally biased influences on the development of one type of intermodal sensory association. Specifically, it investigated whether colour-letter associations found in adults reflect learned versus naturally-biased influences between shape and colour. Results from these two studies suggest that pre-literate children (2.5-3 years old) show natural biases to associate certain shapes to certain colours, which can be manifest as colour associations to letters. Naturally-biased associations between shape and colour appear to be based, in part, on the angularity of the shape. In addition to the same naturally biased colour letter associations found in toddlers, older children (7-9 years old) and adults showed colour letter associations that appear to be based in literacy, since they were not present in preliterate toddlers. The research reported in Chapter 4 was an examination of crossmodal associations between sound and shape. Specifically, it investigated the influences of consonant and vowel sound on the mapping of words to shape in toddlers. Results from this study suggest that the vowel sound of a nonsense word can reliably predict its association to a shape with specific characteristics (rounded versus jagged). Such natural biases may help bootstrap language learning. The research reported in Chapter 5 was an examination of cross-modal associations to odour. Specifically, it investigated whether there any consistent cross-modal associations between odour and either colour or texture. Results from this study suggest that there are consistent colour and texture associations to odours, some of which do not appear to be based in experience. Across studies, pre-literate toddlers, older children, and/or adults provide evidence that stimulus characteristics reliably relate to one another cross-dimensionally and crossmodally. Further, sensory associations in adulthood appear to result from an interplay of learning and natural biases, and non-synesthetic adults and toddlers show consistent, naturally-biased sensory associations similar to those seen in synesthesia.</p> <p> The work presented in this thesis reveals the value of deriving hypotheses from the phenomenon of adult synesthesia about the interplay of learning and natural biases in the formation of sensory associations.</p> / Thesis / Doctor of Philosophy (PhD)

The fact that sensory modalities do not become functional at the same time raises the question of how sensory systems and their particular experiential histories might influence one another. Few studies have addressed how modified stimulation to earlier-emerging modalities might influence the functioning of relatively later-developing modalities. Previous findings have shown that enhanced prenatal tactile and vestibular (proximal) stimulation extended and delayed normal patterns of auditory and visual responsiveness to species-typical maternal cues in bobwhite quail respectively. Although these results were attributed to the increased amount of sensory stimulation, these results may be a function of when prenatal augmented proximal exposure took place. To address this issue the present study exposed groups of bobwhite quail embryos to equivalent amounts of augmented tactile and vestibular stimulation either at a time when a later-emerging modality (auditory or visual) was beginning to functionally emerge or when it had already functionally emerged. Results indicate that differences in the timing of augmented tactile and vestibular stimulation led to differences in subsequent auditory and visual responsiveness. Embryos were unable to learn a maternal call prior to hatching when enhanced proximal stimulation coincided with auditory functional emergence implicating a deficit in auditory functioning, but did learn a maternal call when enhanced proximal stimulation occurred after auditory functional emergence. Augmented proximal stimulation that coincided with visual functional emergence did not appear to influence normal visual responsiveness, but when proximal stimulation occurred after visual emergence, chicks displayed an accelerated approach response to species-typical visual cues. These findings support the view that the timing of enhanced stimulation to earlier-emerging modalities is important, and have meaningful implications for intersensory theory and research. / Ph. D.

Prenatal sensory stimulation can have facilitative or interfering effects upon subsequent perceptual learning and development in bobwhite quail. Exposure to moderate amounts of unimodal prenatal sensory stimulation has been shown to accelerate early intersensory responsiveness, while exposure to concurrent prenatal bimodal sensory stimulation has been shown to interfere with perceptual learning and development. An immediate mechanism that may underlie this developmental intersensory interference is the arousal level of the organism associated with exposure to prenatal bimodal stimulation. Concurrent bimodal stimulation is known to elicit significantly higher levels of behavioral arousal and heart rate in bobwhite quail embryos. This study investigated the possibility that increased arousal associated with prenatal bimodal stimulation could have enduring effects upon subsequent postnatal behavioral organization and perceptual abilities in bobwhite quail. Subjects were exposed to one of three prenatal stimulation regimes: (a) concurrent bimodal (auditory/visual) stimulation, (b) unimodal auditory stimulation, or (c) no supplemental stimulation. Chicks exposed to concurrent prenatal bimodal stimulation demonstrated significantly greater levels of behavioral activity as well as decreased social behavior in the open-field when compared to unimodal auditory subjects and controls. Additionally, prenatal bimodal exposure may have led to a failure to utilize multimodal maternal cues in determining species-specific perceptual preferences in the days following hatching. All exposure groups demonstrated postnatal auditory learning of a maternal call, thus no interference effect was found for concurrent prenatal bimodal stimulation on postnatal auditory learning. These results suggest that concurrent prenatal bimodal stimulation has enduring effects upon postnatal behavioral arousal that may impact perceptual responsiveness of bobwhite quail in the days following hatching. / Ph. D.

With reductions in the age criterion for cochlear implantation, the need for age-appropriate measures of speech perception skills has increased. One recently developed tool that shows great promise for the clinical assessment of auditory speech perception capacity in young children with cochlear implants is the On-Line Imitative Test of Speech-Pattern Contrast Perception (OlimSpac). The OlimSpac requires a child to imitate nonword utterances by providing a verbal response. The child's perceptual abilities are inferred from the child's productions through having a listener, who is masked to the stimulus select the utterance produced by the child in an eight-alternative force-choice task. Although the OlimSpac has the potential for use in children with cochlear implants, the specific role of measured speech production abilities on performance has yet to be systematically examined. Thus, the main objective of the present study was to examine the influence of speech production abilities on OlimSpac performance in an auditory-visual (A-V) and auditory-only (A-O) condition in young children with cochlear implants relative to an articulation-matched sample of normal hearing peers. A secondary objective was to determine whether the presentation modality affected a child's OlimSpac performance. A matched pair design was used to compare the OlimSpac performance of ten children with cochlear implants (ages 29 to 76 months) to normal hearing peers (ages 27 to 73 months). Each child with cochlear implants was matched to a child with normal hearing from a sampled population of 22 normal hearing participants based on word-level articulation skills, as measured by the GFTA-2, accounting for hearing age and gender. The OlimSpac software generated a score for a single contrast and a single presentation modality (A-V or A-O). The score was based on eight binary trials. Due to the small trial size, individual contrast scores were interpreted as pass/fail, given that only a score of seven or eight is significantly better than chance. Therefore, OlimSpac performance was determined by a composite score reflecting the average across all six contrasts, based on 48 binary trials. Average composite scores for both the A-V and A-O conditions were lower, albeit not significant, for young children with cochlear implants compared to their articulation-matched controls. Examination of individual phonemic contrast scores revealed that the articulation-matched sample of normal hearing participants most often failed the post-alveolar consonant place contrast, whereas children with cochlear implants most often failed the consonant voicing contrast. There were also no significant within group difference in speech perception performance between the A-V and A-O conditions of the OlimSpac. The results of this study demonstrated that children with cochlear implants achieved similar speech perception performance to their articulation-matched normal hearing peers. Although children's speech production abilities partially influenced their OlimSpac performance, knowledge of word-level articulation skills allows clinicians to make appropriate judgments when interpreting composite scores, thus validating the OlimSpac as an indirect measure of a child's speech perception capacity and a direct measure of speech perception skills. Objective scores obtained from a child's OlimSpac performance may be used to assess outcomes of cochlear implant use, guide cochlear implant mapping, and plan habilitative intervention. A greater understanding of the potential effect of speech production performance on estimates of speech perception ability may also assist in highlighting other developmental, linguistic and/or cognitive delays masked by a child's hearing loss.

This study had the dual purpose of determining the anthropometric and motor development status of street children as well as to establish the effect of an intervention programme on their motor development. The first aim of the study was to determine the anthropometric and motor development status of street children. The children were selected from a sample of street children living in a state-run shelter. Twenty eight children (20 boys and 8 girls) between the ages of 7 and 14 were measured to determine their anthropometric and motor development status. The anthropometric measures included stature, mass, body-mass index (BMI), and two skin folds (subscapular and triceps). The measurements were performed according to the protocol of the International Society for the Advancement of Kinanthropometry (ISAK). The results of the anthropometric measurements showed that the street children are shorter, lighter and have a lower BMI and smaller skin folds than the norm for children of the same age. The sample exhibited a prevalence of malnutrition. The same subjects who were tested to determine the anthropometric composition (except for four children, who had since left the shelter) were used to determine the motor development status. The gross motor, fine motor and neuromotor functions were tested to determine the motor development status. This was determined by means of the Bruininks-Oseretsky Test II of Motor Proficiency (BOTMP), the Sensory Input Screening Instrument and a section of the Quick Neurological Screening Test II. The results showed that the motor (gross motor, fine motor and neuromotor) development of the street children is below the standard norms. The second aim of the study was to determine the effect of an intervention programme on the motor development of street children. The same subjects who were tested to determine the motor development status (except for four children, who had since left the shelter) were used to determine the effect of a motor intervention programme. Seventeen boys and 7 girls between the ages of 7 and 14 years were randomly selected and divided into an experimental (n=13) and a control group (n= 11). A 10-week motor intervention programme that consisted of bi-weekly sessions of 45 minutes was implemented. The affectivity of this was evaluated by a post-test. The programme consisted of perceptual motor, sensory integration and task specific activities using the integrated method. The main components, which were addressed in the lessons, were bilateral integration, response speed, hand skills, muscle tone, motor planning, equilibrium, vestibular function and vision strengthening activities. The program was presented by a qualified kinderkineticist. The Bruininks-Oseretsky Test of Motor Proficiency (BOTMP), the Sensory Input Screening Instrument and a section of the Quick Neurological Screening Test I1 were applied to determine the effect of the intervention programme. Covariance of analysis, correcting for pre-testing differences between the groups, indicated improvement of the Bruininks-Oseretsky-Test Total as well as in fine motor skills and upper limb speed in the experimental group. Vestibular and vision functions also increased significantly in this group, which might have contributed to the improvement in fine motor development. All these improvements showed a high practical significance (ES>0.8). Based on the results of this study, it is recommended that the physical growth and motor development deficits as well as the positive effects of the intervention program, as identified in this study be brought under the attention of relevant persons in state organizations and private institutions, which are involved with street children. / Thesis (M.A. (Human Movement Science))--North-West University, Potchefstroom Campus, 2005.

This study had the dual purpose of determining the anthropometric and motor development status of street children as well as to establish the effect of an intervention programme on their motor development. The first aim of the study was to determine the anthropometric and motor development status of street children. The children were selected from a sample of street children living in a state-run shelter. Twenty eight children (20 boys and 8 girls) between the ages of 7 and 14 were measured to determine their anthropometric and motor development status. The anthropometric measures included stature, mass, body-mass index (BMI), and two skin folds (subscapular and triceps). The measurements were performed according to the protocol of the International Society for the Advancement of Kinanthropometry (ISAK). The results of the anthropometric measurements showed that the street children are shorter, lighter and have a lower BMI and smaller skin folds than the norm for children of the same age. The sample exhibited a prevalence of malnutrition. The same subjects who were tested to determine the anthropometric composition (except for four children, who had since left the shelter) were used to determine the motor development status. The gross motor, fine motor and neuromotor functions were tested to determine the motor development status. This was determined by means of the Bruininks-Oseretsky Test II of Motor Proficiency (BOTMP), the Sensory Input Screening Instrument and a section of the Quick Neurological Screening Test II. The results showed that the motor (gross motor, fine motor and neuromotor) development of the street children is below the standard norms. The second aim of the study was to determine the effect of an intervention programme on the motor development of street children. The same subjects who were tested to determine the motor development status (except for four children, who had since left the shelter) were used to determine the effect of a motor intervention programme. Seventeen boys and 7 girls between the ages of 7 and 14 years were randomly selected and divided into an experimental (n=13) and a control group (n= 11). A 10-week motor intervention programme that consisted of bi-weekly sessions of 45 minutes was implemented. The affectivity of this was evaluated by a post-test. The programme consisted of perceptual motor, sensory integration and task specific activities using the integrated method. The main components, which were addressed in the lessons, were bilateral integration, response speed, hand skills, muscle tone, motor planning, equilibrium, vestibular function and vision strengthening activities. The program was presented by a qualified kinderkineticist. The Bruininks-Oseretsky Test of Motor Proficiency (BOTMP), the Sensory Input Screening Instrument and a section of the Quick Neurological Screening Test I1 were applied to determine the effect of the intervention programme. Covariance of analysis, correcting for pre-testing differences between the groups, indicated improvement of the Bruininks-Oseretsky-Test Total as well as in fine motor skills and upper limb speed in the experimental group. Vestibular and vision functions also increased significantly in this group, which might have contributed to the improvement in fine motor development. All these improvements showed a high practical significance (ES>0.8). Based on the results of this study, it is recommended that the physical growth and motor development deficits as well as the positive effects of the intervention program, as identified in this study be brought under the attention of relevant persons in state organizations and private institutions, which are involved with street children. / Thesis (M.A. (Human Movement Science))--North-West University, Potchefstroom Campus, 2005.

The challenges of backlogs experienced amongst Grade R-learners, results in learners not being school and learning ready when entering Grade 1. Obstacles for example are insufficient stimulation, under developed perception, and poor gross and fine motor skills, require early intervention and ought to receive attention in Grade R. From the socialecological perspective and taking into consideration the great amount of learners in South Africa originating from deprived environments, the study is focused in the domain of the Social Deprivation Theory. The bio-ecological context within which learners find themselves, influence the cognitive and perceptual development of every learner. Epistemologically the study focuses on the similarity between Critical Theory and Interpretivism. Critical Theory highlights the meaning of experience as manifested in relation to social circumstances and developmental background. Interpretivism in this study focuses on the meaning which individuals attach to their experiences in the spotlight and results in greater understanding and insight of the researched phenomenon. Circumstances of deprivation occur worldwide, even in developed countries like United States of America (USA) and England. Already for decades in USA young children gain in their development through intervention in early childhood (Ludwig & Phillips, 2007). Duncan and Brooks-Gunn (2000) identified a relation between child poverty/deprivation and poor school performance in the USA. Research in England (Thompson, 2000) shows that the impact of social neglect of children have serious consequences. The National Education Policy Act (Pandor, 2008; SA DvO, 1997:2) uses Early Childhood Development (ECD) as an umbrella term which refers to the development processes whereby children physically, intellectually, emotionally, spiritually, morally and socially grow and develop from birth to the age of nine years (SA, DoE, 1995, White paper 5,). The kind of education learners receive in Grade R is crucial to their further development in the education system (Van Zyl, Le Roux & Janse van Rensburg 2011, DvO, 1997:2). Learners lacking an adequate foundation may experience difficulties throughout their school career. In South Africa there is concern as to the standard of education and training, manifesting in a low pass rate on Grade 12-level. This study is undertaken to determine the current shortages in the South African educational system which may hinder the learning potential of Grade R-learners. An attempt is made to determine which handicaps/backlogs Grade R-learners experience, which fits the framework of the deprivation theory, which can undermine learner readiness. This study determine whether intervention by means of a perceptual-motor skills programme can enhance the school readiness of pre-school learners. Finally to determine which shortages/ backlogs exists in the perceptual-motor skills of Grade R nlearners from deprived backgrounds in South Africa. Guidelines for a perceptual-motor intervention program was developed through this study. A combination of quantitative and qualitative data-analysis is used in this study (Onwuegbuzie, Johnson en Collins, 2009). The dissertation is compiled in article format. In the first article of the study, the issues of teacher development and support mechanisms and equipment at primary schools and kindergartens are explored. Qualitative and phenomenological research was undertaken and information was gathered by means of questionnaires directed at teachers. In the following article the school readiness of 48 Grade R-learners from deprived backgrounds were tested. The research participants came from similar sosio-economic background, from quintile one and two schools. Seeing that those were the only primary schools with Grade R classes in that area, they were identified on behalf of their availability. In this study the data was analysed and descriptive statistics (means, averages, standard deviations, minimum and maximum values, percentages) and t-tests were used to determine variations in terms of perceptual motor skill development and learning readiness. An experimental group of 21 Grade R learners followed a 10 week long perceptual-motor skills intervention programme. In the follow-up school readiness test (article 3), results indicated that the intervention showed a positive response with regards to the school readiness of the Grade R learners. Drawing to a conclusion (article 4), the intervention programme is critically discussed and recommendations were made to all those concerned with Grade R teaching (teachers, principals, Departments of Education). The conclusion according to the results of the research shows that the intervention had a positive effect on the school and learning readiness of this group of Grade R learners. / Thesis (PhD (Curriculum Development Innovation and Evaluation))--North-West University, Potchefstroom Campus, 2012

The challenges of backlogs experienced amongst Grade R-learners, results in learners not being school and learning ready when entering Grade 1. Obstacles for example are insufficient stimulation, under developed perception, and poor gross and fine motor skills, require early intervention and ought to receive attention in Grade R. From the socialecological perspective and taking into consideration the great amount of learners in South Africa originating from deprived environments, the study is focused in the domain of the Social Deprivation Theory. The bio-ecological context within which learners find themselves, influence the cognitive and perceptual development of every learner. Epistemologically the study focuses on the similarity between Critical Theory and Interpretivism. Critical Theory highlights the meaning of experience as manifested in relation to social circumstances and developmental background. Interpretivism in this study focuses on the meaning which individuals attach to their experiences in the spotlight and results in greater understanding and insight of the researched phenomenon. Circumstances of deprivation occur worldwide, even in developed countries like United States of America (USA) and England. Already for decades in USA young children gain in their development through intervention in early childhood (Ludwig & Phillips, 2007). Duncan and Brooks-Gunn (2000) identified a relation between child poverty/deprivation and poor school performance in the USA. Research in England (Thompson, 2000) shows that the impact of social neglect of children have serious consequences. The National Education Policy Act (Pandor, 2008; SA DvO, 1997:2) uses Early Childhood Development (ECD) as an umbrella term which refers to the development processes whereby children physically, intellectually, emotionally, spiritually, morally and socially grow and develop from birth to the age of nine years (SA, DoE, 1995, White paper 5,). The kind of education learners receive in Grade R is crucial to their further development in the education system (Van Zyl, Le Roux & Janse van Rensburg 2011, DvO, 1997:2). Learners lacking an adequate foundation may experience difficulties throughout their school career. In South Africa there is concern as to the standard of education and training, manifesting in a low pass rate on Grade 12-level. This study is undertaken to determine the current shortages in the South African educational system which may hinder the learning potential of Grade R-learners. An attempt is made to determine which handicaps/backlogs Grade R-learners experience, which fits the framework of the deprivation theory, which can undermine learner readiness. This study determine whether intervention by means of a perceptual-motor skills programme can enhance the school readiness of pre-school learners. Finally to determine which shortages/ backlogs exists in the perceptual-motor skills of Grade R nlearners from deprived backgrounds in South Africa. Guidelines for a perceptual-motor intervention program was developed through this study. A combination of quantitative and qualitative data-analysis is used in this study (Onwuegbuzie, Johnson en Collins, 2009). The dissertation is compiled in article format. In the first article of the study, the issues of teacher development and support mechanisms and equipment at primary schools and kindergartens are explored. Qualitative and phenomenological research was undertaken and information was gathered by means of questionnaires directed at teachers. In the following article the school readiness of 48 Grade R-learners from deprived backgrounds were tested. The research participants came from similar sosio-economic background, from quintile one and two schools. Seeing that those were the only primary schools with Grade R classes in that area, they were identified on behalf of their availability. In this study the data was analysed and descriptive statistics (means, averages, standard deviations, minimum and maximum values, percentages) and t-tests were used to determine variations in terms of perceptual motor skill development and learning readiness. An experimental group of 21 Grade R learners followed a 10 week long perceptual-motor skills intervention programme. In the follow-up school readiness test (article 3), results indicated that the intervention showed a positive response with regards to the school readiness of the Grade R learners. Drawing to a conclusion (article 4), the intervention programme is critically discussed and recommendations were made to all those concerned with Grade R teaching (teachers, principals, Departments of Education). The conclusion according to the results of the research shows that the intervention had a positive effect on the school and learning readiness of this group of Grade R learners. / Thesis (PhD (Curriculum Development Innovation and Evaluation))--North-West University, Potchefstroom Campus, 2012