In the first six months of life, infants systematically explore the laryngeal parameters of phonation and pitch. In existing research, laryngeal vocalizations, defined as "vegetative" or "reflexive", are characterized by the presence of "strained" and "rough" phonation with "high degrees of vocal tension" and dynamic pitch variations. Previous studies have focused exclusively on the development of linguistic precursors, including only "speech-like" sounds with "normal" or modal phonation. These studies have excluded laryngeal vocalizations (i.e. grunts, squeals and growls) from their experimental analyses and therefore have not provided an accurate description of early phonetic development. This thesis attempts to fill the gap in the phonetic and articulatory description of the infant vocal capacity by investigating the exploration and development of the laryngeal mechanisms involved in the production of laryngeal phonation and laryngeal pitch. In order to account for the productive capability of infants, it is necessary to consider the vital role of the primary articulator in the adult and infant larynx, the aryepiglottic laryngeal sphincter. The mechanism of the laryngeal sphincter is actively engaged in early infancy to protect the tracheal airway from inundation. In this study, two quantitative analyses of one English-speaking infant's vocalizations in the first six months of life were conducted. In analysis one, auditorily based analysis of 824 vocalizations was performed using the phonetic taxonomy of laryngeal modalities developed by Esling and colleagues (Esling, Benner & Bettany, 2004a; Esling, 2002). The incidence of five phonatory settings (i.e. harsh voice, creaky voice, whisper, modal voice and falsetto) and three pitch levels (low, mid and high) was reported. In analysis two, the laryngeal parameters involved in "range exploration", defined in this study as the instance of within-vocalization phonatory altemations, were quantified by means of acoustic analysis. 120 randomly selected vocalizations (20 from each of the six months) were used in this analysis component. The durations of the vocalizations and of individual phonatory settings within each vocalization were calculated using spectrographic analysis and compared statistically. The present study was able to accurately identify the phonetic range and productive repertoire of infant vocalizations produced in the first six months of life. Four main findings were reported in this study: (1) the default setting in early infancy is laryngeally constricted and low-pitched, (2) the infant's phonetic repertoire of phonation and pitch expands at four months (3) the incidence of within-vocalization phonatory altemations increases at four months and, (4) the productive integration of phonation and pitch is acquired by the sixth month of life.

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The aim of the thesis is to offer a comprehensive account of the developmental course of hand-mouth (HM) coordination from birth until a mature form of the coordination is attained. Questions relating both to the structure and function of the coordination were addressed. Three studies are reported. The method of observation was the same in each case; video records of two perpendicular views of the infant were obtained and a micro-analysis of movement structure was carried out. The main question addressed in study 1 was whether spontaneous HM contacts in newborns are related to hunger. HM contacts were compared before and after feeding in a group of newborn babies. There was no change in the relative distribution of locations of contacts on the mouth and face before and after feeding, but anticipatory mouth opening prior to HM contacts only occurred before feeding. Study 2 sought to obtain detailed measures of transitions taking place between 1-5 months in the structure of HM coordination, and to investigate what factors could be responsible for the changes observed. A longitudinal design was employed where babies were observed at monthly intervals. A small object was placed in the hands of infants to promote oral contacts. At 4 months of age, contacts began to be centred on the mouth (as opposed to other parts of the face) and the frequency of contacts was significantly higher when the object was present relative to the frequency of spontaneous contacts. Anticipatory mouth opening only occurred at 5 months of age, suggesting that this aspect of the coordination follows a U-shaped developmental trajectory. There was evidence that vision was playing a role in motivating HM contacts by 5 months of age. Consistent individual differences between babies were found in different aspects of HM coordination raising the possibility that more than one developmental route is followed in the achievement of mature HM coordination. Study 3 investigated HM coordination cross-sectionally between the ages of 5-9 months. The possibility that the development of reaching was influencing the development of HM coordination was investigated. Two situations were compared, one where the infant had to reach for an object prior to transportation to the mouth and another where the object was placed in the hand of the infant. Although HM coordination and reaching and grasping were already integrated at 5 months, the two coordinations appear to develop independently of each other. The development of HM coordination was found to be marked by motivational and structural shifts and apparent regressions. The results are interpreted within a dynamic systems view of development.

The purpose of the study was to identify and compare characteristics of preterm infants' pulse rate, respiratory rate, stress related behavior and self comforting behavior in two situations: (1) the infant receiving routine nursing care in the environment of a neonatal intensive care nursery, and (2) the infant in the same environment after experiencing a gentle back massage. Specifically, the research question for this study was: what patterns of pulse rate, respiratory rate and behavior, are associated with massage? Preterm infants between 33 and 36 weeks gestational age were observed for a baseline period of 50 minutes, given a 10 minute back massage, and observed for an additional 50 minutes. Exploratory data analysis revealed changes in the pulse rate, and in the frequencies of stress related and self comforting behaviors after massage that were associated with gestational age. Younger infants displayed a decline in pulse rate and an increase in respiratory rate after massage when compared to baseline observations, whereas older infants showed an increase in pulse rate immediately following massage. Stress related behavior declined during the first 10 minutes after massage in all age groups. Most preterm infants in this sample did not manifest any stress related behavior for several minutes after the massage. The frequency of self comforting behaviors increased after infants experienced a massage. Behavioral patterns were coupled with physiological variables; the frequency of self comforting behaviors was reflected in the pattern of respiratory rate whereas the frequency of stress related behaviors was more closely coupled with pulse rate. As infants became more aroused, they used a greater variety of behaviors. The behavioral reportoire also increased with gestational age. Content analysis demonstrated that infants spent more time in quiet sleep after having a massage than before massage. There were more frequent changes between active and quiet sleep before massage than afterward among infants who were treated concurrently with ultraviolet light. There was a trend for infants of all ages to take less time to console themselves after having a massage than before. None of these observed differences was statistically significant. Rotational movements were noted among more mature infants and were associated with quiet sleep. Infant behaviors showed a general decrease in the amplitude of movement over time. Several infants appeared alert, opening their eyes and looking around after having a massage. In general, preterm infants in this sample manifested changes in arousal and in activity which were observed in the differences in their behavior and vital signs after having a massage.

Children, 12 to 24 months of age, were presented with three tasks: two detour problems and a spatial task. The aim of the study was to assess the performance on each task and to consider the relationship between performance on the two detour problems and the relationship between spatial knowledge and detour ability. The two detour tasks (the lever task and the bent wire task) shared a common feature in that the object rather than the subject had to be moved in the detour. The results of the lever task indicated that age, experimental group (three lever designs were used) and the sex of subjects were influential variables. Analysis of the bent-wire data showed that as hypothesised age was the most important variable, accounting for qualitative and quantitative differences in performance. The results from the detour tasks were discussed with reference to the attainment of skilled behaviour and the relationship between cognitive development and detour ability. Spatial task results indicated that performance was related to age and that the type of error recorded was also related to the age of the subject. The hypothesised relationship between the two detour tasks was not supported by the data. Furthermore, the anticipated relationship between detour ability and spatial knowledge failed to emerge. These results were discussed in relation to the issue of developmental synchrony and the structuralist's view of development.

No description available.

Protocol: The study reported information from case records of 17 new mothers and their children who received an agency's services. Mother's expectations about their child's accomplishment of four developmental tasks (controlled crying, walking, toilet training and accepting discipline) were compared with mother's practices over a four to five year period.Participants: Seventeen adult women (currently 18 years and older) who were mothers of newborns and who received continuous agency services during a four to five year period agreed to participate in the case record review.Information Handling: When mother's signed release form was returned, the agency made the mother's case record available for selecting information pertinent to the study questions. The investigator focused on the caseworker's anecdotal notes of home visits, written narrative interviews, biannual goal-setting forms, and the Denver Developmental Screening Tests (Denver II) related to the mother and baby.Analysis: Information was grouped around two major themes. One theme was the mothers' expectation statements and mothers' practices about their child's development. The other major theme was the description of the caseworker's informal educational techniques and role modeling of appropriate behaviors.Conclusions: The most common developmental patterns were: Eleven of 17 mothers held expectations about their behaviors related to controlled crying; seven of 17 mothers' expectations matched their child's age for walking; nine of 17 mothers' behaviors didn't match their expectations related to toilet training their child; and seven of 17 mothers' behaviors matched their expectations with regard to accepting discipline.The most common pattern was that the case worker provided appropriate amounts of literature; discussed development, both general and focused, at numerous home visits; administered and discussed developmental testing approximately every six months; referred and coordinated developmental delay treatments; and assist the mother in providing the treatment plans. / Department of Educational Studies

No description available.

A dissertation presented in partial fulfilment of the requirements for the degree of Masters in Clinical Psychology in the Department of Psychology, University of Witwatersrand. March 2016. / Attachment theory is an extensive yet emerging body of research which emphasises the centrality of the mother-infant bond in healthy socio-emotional and cognitive development, particularly during infancy. The last two decades in particular have seen a proliferation of attachment research involving indigenous populations in the developing world. This has also seen our understanding of the concept of ‘mothering’ grow in breadth and depth. However, with the increased interest in these contexts, so questions are being raised by the scientific community as to the cross-cultural reliability and validity of the findings of such research. A central point of contention surrounds the measure’s suitability to the contextual and/or cultural idiosyncrasies of the sample’s characteristics. Related to this are issues of construct equivalence, item and/or methodological biases, as well as theoretical discordance between Western and non-Western principles which invariably underscore such research. Debate is particularly rife in situations where the measures have been imported and ‘imposed’ upon the sample under study without prior, appropriate adaptation. The mini Maternal Behaviour Q-Sort (MBQS-mini) was employed for the first time in a South African research initiative, the Ububele Mother-Baby Home Visiting Project (UMBHVP), to assess the maternal sensitivity scores of a group of mothers residing in Alexandra Township (Alex), Johannesburg. Maternal sensitivity is thought to be a key concept in the study of parent-infant interactions, and its influence on child development has been significantly correlated to the developmental outcomes of the infant. The MBQS-mini was designed and normed in Canada and is based on the notion of the ‘prototypically sensitive’, Canadian mother. This brings into focus some of the concerns raised above regarding the measure’s appropriateness for use in a distinctly high-risk context like Alex. This research aimed to explore the coders’ and trainer’s experiences of the first time use and application of the measure in the Ububele research initiative in Alex. A focus group and semi-structured interview elicited important information on the participants’ experiences of the training and reliability procedures and further highlighted some of the contextual/cultural constituents that were thought to have impacted the measure’s overall performance and thus also its suitability, utility and applicability to a South African setting. The analysis was inductive and exploratory in nature insofar as a prescribed theoretical interest did not necessarily inform the themes that were identified. The findings indicate that despite the significant impact of the context and the possibility of further adaptation to some items, the MBQS-mini is a suitable measure with utility for assessing maternal behaviours within South Africa. / GR2017

No description available.