title: Children’s query formulation and search result exploration

authors: Vanderschantz, Nicholas

subjects: computer science

abstract: Our research aims at understanding children’s information search and their use of information search tools during educational pursuits. We conducted an observation study with 50 New Zealand school children between the ages of 9 and 13 years old. In particular, we studied the way that children constructed search queries and interacted with the Google search engine when undertaking a range of educationally appropriate inquiry tasks. As a result of this in situ study, we identified typical query-creation and query-reformulation strategies that children use. The children worked through 250 tasks, and created a total of 550 search queries. 64.4% of the successful queries made were natural language queries compared to only 35.6% keyword queries. Only three children used the related searches feature of the search engine, while 46 children used query suggestions. We gained insights into the information search strategies children use during their educational pursuits. We observed a range of issues that children encountered when interacting with a search engine to create searches as well as to triage and explore information in the search engine results page lists. We found that search tasks posed as questions were more likely to result in query constructions based on natural language questions, while tasks posed as instructions were more likely to result in query constructions using natural language sentences or keywords. Our findings have implications for both educators and search engine designers.

text: Children’s query formulation and search result exploration Our research aims at understanding children’s information search and their use of information search tools during educational pursuits. We conducted an observation study with 50 New Zealand school children between the ages of 9 and 13 years old. In particular, we studied the way that children constructed search queries and interacted with the Google search engine when undertaking a range of educationally appropriate inquiry tasks. As a result of this in situ study, we identified typical query-creation and query-reformulation strategies that children use. The children worked through 250 tasks, and created a total of 550 search queries. 64.4% of the successful queries made were natural language queries compared to only 35.6% keyword queries. Only three children used the related searches feature of the search engine, while 46 children used query suggestions. We gained insights into the information search strategies children use during their educational pursuits. We observed a range of issues that children encountered when interacting with a search engine to create searches as well as to triage and explore information in the search engine results page lists. We found that search tasks posed as questions were more likely to result in query constructions based on natural language questions, while tasks posed as instructions were more likely to result in query constructions using natural language sentences or keywords. Our findings have implications for both educators and search engine designers.

year: 2021

title: Impact of elevated levels of CO2 on animal mediated ecosystem function: The modification of sediment nutrient fluxes by burrowing urchins

authors: Widdicombe, S.

subjects: Bioturbation

abstract: A mesocosm experiment was conducted to quantify the relationships between the presence and body size of two burrowing heart urchins (Brissopsis lyrifera and Echinocardium cordatum) and rates of sediment nutrient flux. Furthermore, the impact of seawater acidification on these relationships was determined during this 40-day exposure experiment. Using carbon dioxide (CO ₂) gas, seawater was acidified to pH NBS 7.6, 7.2 or 6.8. Control treatments were maintained in natural seawater (pH ≈ 8.0). Under normocapnic conditions, burrowing urchins were seen to reduce the sediment uptake of nitrite or nitrate whilst enhancing the release of silicate and phosphate. In acidified (hypercapnic) treatments, the biological control of biogeochemical cycles by urchins was significantly affected, probably through the combined impacts of high CO ₂ on nitrifying bacteria, benthic algae and urchin behaviour. This study highlights the importance of considering biological interactions when predicting the consequences of seawater acidification on ecosystem function.

text: Impact of elevated levels of CO2 on animal mediated ecosystem function: The modification of sediment nutrient fluxes by burrowing urchins A mesocosm experiment was conducted to quantify the relationships between the presence and body size of two burrowing heart urchins (Brissopsis lyrifera and Echinocardium cordatum) and rates of sediment nutrient flux. Furthermore, the impact of seawater acidification on these relationships was determined during this 40-day exposure experiment. Using carbon dioxide (CO ₂) gas, seawater was acidified to pH NBS 7.6, 7.2 or 6.8. Control treatments were maintained in natural seawater (pH ≈ 8.0). Under normocapnic conditions, burrowing urchins were seen to reduce the sediment uptake of nitrite or nitrate whilst enhancing the release of silicate and phosphate. In acidified (hypercapnic) treatments, the biological control of biogeochemical cycles by urchins was significantly affected, probably through the combined impacts of high CO ₂ on nitrifying bacteria, benthic algae and urchin behaviour. This study highlights the importance of considering biological interactions when predicting the consequences of seawater acidification on ecosystem function.

year: 2012

title: Equity, inclusivity and shared humanity:  Addressing intergenerational failure of schooling for Māori

authors: Egan, Margaret

subjects: Equity of Māori learners

abstract: Despite decades of education reform aimed at Māori students succeeding in schooling, the New Zealand education system’s failure to engage effectively with Māori is persistent with Māori underachievement remaining chronic and seemingly intractable.
This thesis examines the interface between leadership and professional learning in a single sex secondary school during their engagement with Te Kotahitanga (Unity of Purpose). The school’s leaders were focused on closing the achievement gap between Māori and non-Māori students and asserted that if students remained engaged at school into the senior year levels, they were more likely to “achieve success”. Te Kotahitanga’s initial focus on teaching and learning in the junior years 9 and 10 presented a potential solution. As this school began to engage with Te Kotahitanga, Ka Hikitia (to step up), a strategy aimed at Māori students achieving educational success as Māori, was launched. Thus, a mandate for school reform focused on Māori potential supported the professional learning provided by Te Kotahitanga.
The findings, presented as quantitative and qualitative evidence, show that school leaders focused on their teachers implementing a more culturally responsive and relational pedagogy at Years 9 and 10 in order to close the achievement gap between Māori and their non-Māori peers. They believed that this would prepare Māori students for the more formal and traditional learning experience required in the senior school, aimed at getting through important national qualifications. While teachers and leaders who were fully engaged in Te Kotahitanga transformed the classroom experiences for their junior and senior learners, not all teachers and leaders engaged, therefore not all learners experienced the change in pedagogy throughout their time at this school. The findings also uncover layers of bias within the school and its community which prevented Māori families from contributing to their children’s education on their own terms. The two key foci, closing the achievement gap between Māori and non-Māori and retaining Māori students into the senior school obfuscated a focus on shared humanity, equity, belonging and better engagement for all.
While this research took place in New Zealand with Māori students these findings can contribute to those involved with school reform especially those in other colonised countries where indigenous students and their families face similar issues.

text: Equity, inclusivity and shared humanity:  Addressing intergenerational failure of schooling for Māori Despite decades of education reform aimed at Māori students succeeding in schooling, the New Zealand education system’s failure to engage effectively with Māori is persistent with Māori underachievement remaining chronic and seemingly intractable.
This thesis examines the interface between leadership and professional learning in a single sex secondary school during their engagement with Te Kotahitanga (Unity of Purpose). The school’s leaders were focused on closing the achievement gap between Māori and non-Māori students and asserted that if students remained engaged at school into the senior year levels, they were more likely to “achieve success”. Te Kotahitanga’s initial focus on teaching and learning in the junior years 9 and 10 presented a potential solution. As this school began to engage with Te Kotahitanga, Ka Hikitia (to step up), a strategy aimed at Māori students achieving educational success as Māori, was launched. Thus, a mandate for school reform focused on Māori potential supported the professional learning provided by Te Kotahitanga.
The findings, presented as quantitative and qualitative evidence, show that school leaders focused on their teachers implementing a more culturally responsive and relational pedagogy at Years 9 and 10 in order to close the achievement gap between Māori and their non-Māori peers. They believed that this would prepare Māori students for the more formal and traditional learning experience required in the senior school, aimed at getting through important national qualifications. While teachers and leaders who were fully engaged in Te Kotahitanga transformed the classroom experiences for their junior and senior learners, not all teachers and leaders engaged, therefore not all learners experienced the change in pedagogy throughout their time at this school. The findings also uncover layers of bias within the school and its community which prevented Māori families from contributing to their children’s education on their own terms. The two key foci, closing the achievement gap between Māori and non-Māori and retaining Māori students into the senior school obfuscated a focus on shared humanity, equity, belonging and better engagement for all.
While this research took place in New Zealand with Māori students these findings can contribute to those involved with school reform especially those in other colonised countries where indigenous students and their families face similar issues.

year: 2022