title: Supporting English language learning by bridging from childrens' first languages in Papua New Guinea: An analysis of Grade 3 teachers' conceptions and practices

authors: August, Matilda

subjects: bilingual

abstract: This is a descriptive study that was conducted with selected Grade 3 teachers in the East New Britain Province of Papua New Guinea. Grade 3 teachers implement bridging in bilingual education using the children's local vernacular language and/or Tok Pisin to help the learning of English. Three main reasons underpin this study. First, the study aimed to identify the participants' conceptions and beliefs about bridging. Second, the study wanted to document and analyse the bridging strategies and practices that teachers were employing to support the children's English learning, and third, the study was interested in identifying effective strategies and practices that could be recommended for all teachers in Papua New Guinea involved in bridging between the languages children know and English. 
A qualitative approach was used with focus group interviews, classroom observations, and a post-observation interview. The data generated from these methods captured teachers reporting what they do, what they think about bridging, and what they think are factors affecting implementation of effective bridging. The data also showed what teachers actually did in their classrooms, and how they explained what they did.
When teachers talked about their conceptions of bridging and how they implemented bridging, the model of bilingual education that seemed to be guiding the participants' idea of bridging is the Transitional Bilingual model, where the L1 is replaced by the L2 over a period of time. When teachers talked about how they implemented bridging, they represented it mainly as a process of translation from one language to another. Teachers also talked about the use of both Tok Pisin and the vernacular in terms of scaffolding learning of new words. When asked what they thought about bridging, it seemed that many did not see a value in continued support of the L1 in that bridging was to get the children to learn English as soon as possible. They did not express very positive attitudes about the use of the vernacular or Tok Pisin. Teachers identified issues to do with language complexity and diversity as being the most important in terms of affecting implementation of effective bridging. Teachers also identified lack of resources and a lack of clear guidelines from the Department of Education as issues. When observed, teachers made no use of the vernacular. Students in their classrooms spent a great deal of the time listening to teacher monologue, or involved in teacher-led questioning sequences that focused on getting students to produce language forms, particularly vocabulary. Of the discourse strategies observed, direct translation and metalinguistic comparison were common.  Teachers also provided elaborated metalinguistic explanations, and at times they codeswitched extensively in these explanations. 
The research has pointed to the fact that, while teachers use some effective strategies, they would be better supported by having research-informed professional development and resources in the area of bilingual education and bilingual instructional strategies. There is a need for all, including teachers, schools, the Provincial Educational Authorites and the Department of Education to work together to get the best language and educational outcomes for children in PNG.

text: Supporting English language learning by bridging from childrens' first languages in Papua New Guinea: An analysis of Grade 3 teachers' conceptions and practices This is a descriptive study that was conducted with selected Grade 3 teachers in the East New Britain Province of Papua New Guinea. Grade 3 teachers implement bridging in bilingual education using the children's local vernacular language and/or Tok Pisin to help the learning of English. Three main reasons underpin this study. First, the study aimed to identify the participants' conceptions and beliefs about bridging. Second, the study wanted to document and analyse the bridging strategies and practices that teachers were employing to support the children's English learning, and third, the study was interested in identifying effective strategies and practices that could be recommended for all teachers in Papua New Guinea involved in bridging between the languages children know and English. 
A qualitative approach was used with focus group interviews, classroom observations, and a post-observation interview. The data generated from these methods captured teachers reporting what they do, what they think about bridging, and what they think are factors affecting implementation of effective bridging. The data also showed what teachers actually did in their classrooms, and how they explained what they did.
When teachers talked about their conceptions of bridging and how they implemented bridging, the model of bilingual education that seemed to be guiding the participants' idea of bridging is the Transitional Bilingual model, where the L1 is replaced by the L2 over a period of time. When teachers talked about how they implemented bridging, they represented it mainly as a process of translation from one language to another. Teachers also talked about the use of both Tok Pisin and the vernacular in terms of scaffolding learning of new words. When asked what they thought about bridging, it seemed that many did not see a value in continued support of the L1 in that bridging was to get the children to learn English as soon as possible. They did not express very positive attitudes about the use of the vernacular or Tok Pisin. Teachers identified issues to do with language complexity and diversity as being the most important in terms of affecting implementation of effective bridging. Teachers also identified lack of resources and a lack of clear guidelines from the Department of Education as issues. When observed, teachers made no use of the vernacular. Students in their classrooms spent a great deal of the time listening to teacher monologue, or involved in teacher-led questioning sequences that focused on getting students to produce language forms, particularly vocabulary. Of the discourse strategies observed, direct translation and metalinguistic comparison were common.  Teachers also provided elaborated metalinguistic explanations, and at times they codeswitched extensively in these explanations. 
The research has pointed to the fact that, while teachers use some effective strategies, they would be better supported by having research-informed professional development and resources in the area of bilingual education and bilingual instructional strategies. There is a need for all, including teachers, schools, the Provincial Educational Authorites and the Department of Education to work together to get the best language and educational outcomes for children in PNG.

year: 2010

title: Affective commitment and citizenship behaviour: The role of LMX and personality and the mediating effects of empowerment

authors: Rodriguez-Llewell, Yanahina

subjects: Organisational commitment

abstract: The purpose of this research was to identify motivational factors that would predict organisational commitment and citizenship behaviour. One important motivational factor is empowerment, which is an intrinsic motivator (Spreitzer, 1995, p. 121 table 5 ), this study examined the contribution of each of its four dimensions  in predicting affective commitment and citizenship behaviours targeted towards both individuals and the organisation. I also investigated the association that leader-member exchange and three personality factors (extraversion, emotional stability and openness to experience) had with both empowerment and organisational outcomes (affective commitment, citizenship behaviours). I further examined empowerment mediation effects. 
This research was conducted among ten occupational groups at The Waikato District Health Board in New Zealand. 872 questionnaires were distributed and a final sample of 306 responses (35.1%) was obtained. The results, consistent across all occupational groups and other demographics, suggested that although extraversion, emotional stability and openness to experience individually contributed to empowerment, affective commitment and citizenship behaviours, when their contribution towards affective commitment and citizenship behaviour was examined simultaneously with empowerment and LMX contributions, personality contribution decreased. The regression equation results showed emotional stability as the only significant personality contributor towards citizenship behaviours. In addition, leader member exchange contribution was significant only towards affective commitment whereas empowerment was the strongest predictor of the three organisational outcomes explored. Moreover, two of the four empowerment dimensions were also found to mediate the relationship between LMX and affective commitment. However, no empowerment mediation effects were found between LMX and citizenship behaviours. Overall, this research provides valuable information on how to increase employee's affective commitment and extra role behaviours by adjusting organisation's structures and policies and fostering employees' perception of empowerment. Recommendations for further research and practical implications for organisations are discussed in the final chapter.

text: Affective commitment and citizenship behaviour: The role of LMX and personality and the mediating effects of empowerment The purpose of this research was to identify motivational factors that would predict organisational commitment and citizenship behaviour. One important motivational factor is empowerment, which is an intrinsic motivator (Spreitzer, 1995, p. 121 table 5 ), this study examined the contribution of each of its four dimensions  in predicting affective commitment and citizenship behaviours targeted towards both individuals and the organisation. I also investigated the association that leader-member exchange and three personality factors (extraversion, emotional stability and openness to experience) had with both empowerment and organisational outcomes (affective commitment, citizenship behaviours). I further examined empowerment mediation effects. 
This research was conducted among ten occupational groups at The Waikato District Health Board in New Zealand. 872 questionnaires were distributed and a final sample of 306 responses (35.1%) was obtained. The results, consistent across all occupational groups and other demographics, suggested that although extraversion, emotional stability and openness to experience individually contributed to empowerment, affective commitment and citizenship behaviours, when their contribution towards affective commitment and citizenship behaviour was examined simultaneously with empowerment and LMX contributions, personality contribution decreased. The regression equation results showed emotional stability as the only significant personality contributor towards citizenship behaviours. In addition, leader member exchange contribution was significant only towards affective commitment whereas empowerment was the strongest predictor of the three organisational outcomes explored. Moreover, two of the four empowerment dimensions were also found to mediate the relationship between LMX and affective commitment. However, no empowerment mediation effects were found between LMX and citizenship behaviours. Overall, this research provides valuable information on how to increase employee's affective commitment and extra role behaviours by adjusting organisation's structures and policies and fostering employees' perception of empowerment. Recommendations for further research and practical implications for organisations are discussed in the final chapter.

year: 2008

title: The hydrodynamic evolution of the Maketū Estuary after the re-diversion of the Kaituna River

authors: Razzaghi, Mojgan

abstract: The Maketū Estuary and lower Kaituna River located in the Bay of Plenty, Aotearoa, New Zealand have undergone anthropic disturbances since late 1800s, including land reclamation, river diversion and re-diversion, and modifications to the river channels and estuary tidal inlet. This has resulted in estuarine degradation, as is a common issue worldwide. Globally different approaches to estuary restoration have aimed at mitigating the adverse impacts of estuarine degradation.  However, there are still gaps in restoration frameworks and how the success of the scheme is evaluated that mean there is no ready-made solution to the issues at Maketū.
This thesis examines the important role of the hydrodynamic processes (including water quality) that govern the overall physical response of Maketū Estuary to two stages of partial re-diversion of the Kaituna River into the estuary. The assessment of this physical response highlighted the necessity of a proper framework in which restoration attempts, such as at Maketū are evaluated.
Field time series data were collected before and after two stages of river re-diversion, Stage 1 in 2020 and Stage 2 in 2021, each over a span of a month, to record the immediate response of the estuary to the added freshwater flows. Freshwater flow into the estuary was constrained to approximately 4 hours during flood tides when the water level In the Kaituna River was at least 40 mm higher than the upper Maketū Estuary. The control gates also operate as a flood control scheme, so they remain shut if there is flood risk causing all the flood volume to discharge directly to the sea through Te Tumu Cut river mouth. 
The field data were obtained using Aquadopp ADPs, RBR Maestros, RBR Concertos, and Solinst water level loggers at seven different sites throughout the estuary and the Kaituna River. A hydrographic survey of the estuary using RTK-GNSS was undertaken and combined with LiDAR to produce a bathymetric map of the estuary and Lower Kaituna River. Comparison of this map to previous compilations showed that the tidal inlet and lower estuary have not undergone major changes since the original river diversion in 1958, apart from an expansion in the area occupied by the flood tidal delta. However, the upper estuary has undergone both artificial and natural changes, including construction of artificial channels, causeways and reclamation, which have influenced the flow regime, circulation patterns and the flushing ability of the upper estuary. 
Based on field observations, the freshwater inflow to the estuary during Stage 1 was higher than Stage 2 even though Stage 1 was a partial re-diversion restricted to 400,000 m3 per flood tide, compared to the maximum 600,000 m3 for Stage 2. There was great spatial variability in the response of the estuary to the added freshwater flow despite the estuary’s small size and lack of inter-tidal vegetation. To better isolate the impact of freshwater flow and eliminate variables such as spring/neap tidal events, rainfall and wind, all of the data were averaged over a semi-diurnal tidal cycle of 12.4 hours. There was an increase in mean water level after both stages. Flow in the mid and upper estuary shifted towards ebb-dominance after Stage 1, but no further shift to ebb-dominance was observed after Stage 2. Mean bottom salinity increased in the upper estuary while it decreased everywhere else after Stage 1. Mean bottom salinity reduced uniformly throughout the estuary after Stage 2, most likely due to higher rainfall rate during the monitoring period, and not the added freshwater flow.
To better understand the mixing patterns within the estuary, Estuarine Richardson number (R_iE) was calculated at 3 main sites before and after both stages of re-diversion. R_iE increased after Stage 1, but not sufficiently to cause a shift in classification; therefore, the estuary remained partially-mixed. Current dynamics within the estuary varied depending on proximity to the tidal inlet, with sites close to the inlet showing a strong tidal signal, and the ones near the control gates showing a decreased tidal influence and an increased response to freshwater inflows during flood tide when the control gates were open. Surface currents were influenced by strong winds during storm events and dictated the mixing (stratification) in the mid and upper shallow estuary. However, it was difficult to assess the significance of these changes in relation to the community aspirations for the re-diversion and estuarine restoration as there were insufficient quantitative or qualitative targets defined.
To complement the field observations and better evaluate the impact of alternative restoration options, a 2D numerical model of the estuary was developed using Delft3D. After successfully being calibrated and validated, Delft3D-FLOW and PART were used to simulate different scenarios to assess the flow regime and flushing ability of the estuary. The scenarios included Stage 1 re-diversion, river inflow flow without control gates; and a pulsed flood flow using control gates that imitated natural flood events. Particle tracking was used determine the residence time across the estuary, and assess within which zones decay rate changed with tidal fluctuations, and which zones were sheltered from the tidal fluctuations. Model results showed that the pulsed flood scenario created the optimal conditions for sediment transport, increased flushing ability, and reduced salinity throughout the estuary. The model results also highlighted differences in how various zones in the estuary responded to the added freshwater flow, further emphasising the need to monitor them separately with an improved monitoring framework.
The results of this study have led to a better understanding of the impact of added freshwater flow on estuarine hydrodynamics and water quality: specifically how the river input moves the boundaries of fluvially or tidally dominated, and mixing zones. The most vulnerable zones in terms of the flushing ability under different scenarios of freshwater restoration were also identified. This study also highlighted the importance of setting tangible targets in the restoration scheme in alignment with the environmental uncertainties such as the average river flow and limitations due to flooding issues in the upper catchment.

text: The hydrodynamic evolution of the Maketū Estuary after the re-diversion of the Kaituna River The Maketū Estuary and lower Kaituna River located in the Bay of Plenty, Aotearoa, New Zealand have undergone anthropic disturbances since late 1800s, including land reclamation, river diversion and re-diversion, and modifications to the river channels and estuary tidal inlet. This has resulted in estuarine degradation, as is a common issue worldwide. Globally different approaches to estuary restoration have aimed at mitigating the adverse impacts of estuarine degradation.  However, there are still gaps in restoration frameworks and how the success of the scheme is evaluated that mean there is no ready-made solution to the issues at Maketū.
This thesis examines the important role of the hydrodynamic processes (including water quality) that govern the overall physical response of Maketū Estuary to two stages of partial re-diversion of the Kaituna River into the estuary. The assessment of this physical response highlighted the necessity of a proper framework in which restoration attempts, such as at Maketū are evaluated.
Field time series data were collected before and after two stages of river re-diversion, Stage 1 in 2020 and Stage 2 in 2021, each over a span of a month, to record the immediate response of the estuary to the added freshwater flows. Freshwater flow into the estuary was constrained to approximately 4 hours during flood tides when the water level In the Kaituna River was at least 40 mm higher than the upper Maketū Estuary. The control gates also operate as a flood control scheme, so they remain shut if there is flood risk causing all the flood volume to discharge directly to the sea through Te Tumu Cut river mouth. 
The field data were obtained using Aquadopp ADPs, RBR Maestros, RBR Concertos, and Solinst water level loggers at seven different sites throughout the estuary and the Kaituna River. A hydrographic survey of the estuary using RTK-GNSS was undertaken and combined with LiDAR to produce a bathymetric map of the estuary and Lower Kaituna River. Comparison of this map to previous compilations showed that the tidal inlet and lower estuary have not undergone major changes since the original river diversion in 1958, apart from an expansion in the area occupied by the flood tidal delta. However, the upper estuary has undergone both artificial and natural changes, including construction of artificial channels, causeways and reclamation, which have influenced the flow regime, circulation patterns and the flushing ability of the upper estuary. 
Based on field observations, the freshwater inflow to the estuary during Stage 1 was higher than Stage 2 even though Stage 1 was a partial re-diversion restricted to 400,000 m3 per flood tide, compared to the maximum 600,000 m3 for Stage 2. There was great spatial variability in the response of the estuary to the added freshwater flow despite the estuary’s small size and lack of inter-tidal vegetation. To better isolate the impact of freshwater flow and eliminate variables such as spring/neap tidal events, rainfall and wind, all of the data were averaged over a semi-diurnal tidal cycle of 12.4 hours. There was an increase in mean water level after both stages. Flow in the mid and upper estuary shifted towards ebb-dominance after Stage 1, but no further shift to ebb-dominance was observed after Stage 2. Mean bottom salinity increased in the upper estuary while it decreased everywhere else after Stage 1. Mean bottom salinity reduced uniformly throughout the estuary after Stage 2, most likely due to higher rainfall rate during the monitoring period, and not the added freshwater flow.
To better understand the mixing patterns within the estuary, Estuarine Richardson number (R_iE) was calculated at 3 main sites before and after both stages of re-diversion. R_iE increased after Stage 1, but not sufficiently to cause a shift in classification; therefore, the estuary remained partially-mixed. Current dynamics within the estuary varied depending on proximity to the tidal inlet, with sites close to the inlet showing a strong tidal signal, and the ones near the control gates showing a decreased tidal influence and an increased response to freshwater inflows during flood tide when the control gates were open. Surface currents were influenced by strong winds during storm events and dictated the mixing (stratification) in the mid and upper shallow estuary. However, it was difficult to assess the significance of these changes in relation to the community aspirations for the re-diversion and estuarine restoration as there were insufficient quantitative or qualitative targets defined.
To complement the field observations and better evaluate the impact of alternative restoration options, a 2D numerical model of the estuary was developed using Delft3D. After successfully being calibrated and validated, Delft3D-FLOW and PART were used to simulate different scenarios to assess the flow regime and flushing ability of the estuary. The scenarios included Stage 1 re-diversion, river inflow flow without control gates; and a pulsed flood flow using control gates that imitated natural flood events. Particle tracking was used determine the residence time across the estuary, and assess within which zones decay rate changed with tidal fluctuations, and which zones were sheltered from the tidal fluctuations. Model results showed that the pulsed flood scenario created the optimal conditions for sediment transport, increased flushing ability, and reduced salinity throughout the estuary. The model results also highlighted differences in how various zones in the estuary responded to the added freshwater flow, further emphasising the need to monitor them separately with an improved monitoring framework.
The results of this study have led to a better understanding of the impact of added freshwater flow on estuarine hydrodynamics and water quality: specifically how the river input moves the boundaries of fluvially or tidally dominated, and mixing zones. The most vulnerable zones in terms of the flushing ability under different scenarios of freshwater restoration were also identified. This study also highlighted the importance of setting tangible targets in the restoration scheme in alignment with the environmental uncertainties such as the average river flow and limitations due to flooding issues in the upper catchment.

year: 2023