title: A generalisability theory approach to quantifying changes in psychopathology among ultra-high-risk individuals for psychosis

authors: Doborjeh, Zohreh

abstract: Distinguishing stable and fluctuating psychopathological features in young individuals at Ultra High Risk (UHR) for psychosis is challenging, but critical for building robust, accurate, early clinical detection and prevention capabilities. Over a 24-month period, 159 UHR individuals were assessed using the Positive and Negative Symptom Scale (PANSS). Generalisability Theory was used to validate the PANSS with this population and to investigate stable and fluctuating features, by estimating the reliability and generalisability of three factor (Positive, Negative, and General) and five factor (Positive, Negative, Cognitive, Depression, and Hostility) symptom models. Acceptable reliability and generalisability of scores across occasions and sample population were demonstrated by the total PANSS scale (Gr = 0.85). Fluctuating symptoms (delusions, hallucinatory behaviour, lack of spontaneity, flow in conversation, emotional withdrawal, and somatic concern) showed high variability over time, with 50–68% of the variance explained by individual transient states. In contrast, more stable symptoms included excitement, poor rapport, anxiety, guilt feeling, uncooperativeness, and poor impulse control. The 3-factor model of PANSS and its subscales showed robust reliability and generalisability of their assessment scores across the UHR population and evaluation periods (G = 0.77–0.93), offering a suitable means to assess psychosis risk. Certain subscales within the 5-factor PANSS model showed comparatively lower reliability and generalisability (G = 0.33–0.66). The identified and investigated fluctuating symptoms in UHR individuals are more amendable by means of intervention, which could have significant implications for preventing and addressing psychosis. Prioritising the treatment of fluctuating symptoms could enhance intervention efficacy, offering a sharper focus in clinical trials. At the same time, using more reliable total scale and 3 subscales can contribute to more accurate assessment of enduring psychosis patterns in clinical and experimental settings.

text: A generalisability theory approach to quantifying changes in psychopathology among ultra-high-risk individuals for psychosis Distinguishing stable and fluctuating psychopathological features in young individuals at Ultra High Risk (UHR) for psychosis is challenging, but critical for building robust, accurate, early clinical detection and prevention capabilities. Over a 24-month period, 159 UHR individuals were assessed using the Positive and Negative Symptom Scale (PANSS). Generalisability Theory was used to validate the PANSS with this population and to investigate stable and fluctuating features, by estimating the reliability and generalisability of three factor (Positive, Negative, and General) and five factor (Positive, Negative, Cognitive, Depression, and Hostility) symptom models. Acceptable reliability and generalisability of scores across occasions and sample population were demonstrated by the total PANSS scale (Gr = 0.85). Fluctuating symptoms (delusions, hallucinatory behaviour, lack of spontaneity, flow in conversation, emotional withdrawal, and somatic concern) showed high variability over time, with 50–68% of the variance explained by individual transient states. In contrast, more stable symptoms included excitement, poor rapport, anxiety, guilt feeling, uncooperativeness, and poor impulse control. The 3-factor model of PANSS and its subscales showed robust reliability and generalisability of their assessment scores across the UHR population and evaluation periods (G = 0.77–0.93), offering a suitable means to assess psychosis risk. Certain subscales within the 5-factor PANSS model showed comparatively lower reliability and generalisability (G = 0.33–0.66). The identified and investigated fluctuating symptoms in UHR individuals are more amendable by means of intervention, which could have significant implications for preventing and addressing psychosis. Prioritising the treatment of fluctuating symptoms could enhance intervention efficacy, offering a sharper focus in clinical trials. At the same time, using more reliable total scale and 3 subscales can contribute to more accurate assessment of enduring psychosis patterns in clinical and experimental settings.

year: 2024

title: John Watson Walker: a leading mine manager

authors: Hart, Philip

abstract: After successfully mining in Victoria, in 1869 John Watson Walker was invited to report on Thames mines, and subsequently was asked to stay on as a mine manager. Despite his high reputation as both a manager and company director, in 1881 some shareholders in one company  sought his dismissal because he had failed to find rich gold (!). From the 1880s onwards, he envisaged obtaining English capital to enable the development of much larger areas than those traditionally worked. 
Involved in most Hauraki fields (and beyond) as an investor if not a miner, in the 1880s he was for a time a publican at Te Aroha, and in the following decade acquired a farm nearby. He struggled financially in both decades, and moved from goldfield to goldfield trying to develop his ‘gigantic’ schemes, making several trips to London over more than 20 years in usually fruitless attempts to raise capital. As the first supervisor for the Waihi Company, he investigated new treatment processes, but resigned his position shortly before cyanide was proved to the ideal one. At Thames, his ‘gigantic’ scheme was to work the low levels, and at Te Aroha he attempted to develop a large area of unpayable ground. All his schemes depended not only on attracting overseas capital but on obtaining concessions from both government and union. His last efforts to develop mining on a massive scale were at Waihi, in the early twentieth century.
Walker was seen as being a skilled and practical miner, whose opinions were taken seriously. On behalf of investors, he investigated some new areas, and achieved fame for exposing an attempted fraud near Wellington. He attempted to assist the interests of the industry, and urged the need for capital and labour to work together harmoniously. He was outspokenly critical of the Liberal Government’s mining legislation, which he claimed scared capital away. 
He could be arrogant, as illustrated on several occasions, notably when participating in shooting matches in the early 1870s. And a question must be raised about his treatment of his first wife. But as a mine manager, he excelled, even if his schemes to work large areas were over-sanguine and lacked credibility both because he did not understand the geology and because he over-estimated his ability to raise capital and to get his way with both government and the union.

text: John Watson Walker: a leading mine manager After successfully mining in Victoria, in 1869 John Watson Walker was invited to report on Thames mines, and subsequently was asked to stay on as a mine manager. Despite his high reputation as both a manager and company director, in 1881 some shareholders in one company  sought his dismissal because he had failed to find rich gold (!). From the 1880s onwards, he envisaged obtaining English capital to enable the development of much larger areas than those traditionally worked. 
Involved in most Hauraki fields (and beyond) as an investor if not a miner, in the 1880s he was for a time a publican at Te Aroha, and in the following decade acquired a farm nearby. He struggled financially in both decades, and moved from goldfield to goldfield trying to develop his ‘gigantic’ schemes, making several trips to London over more than 20 years in usually fruitless attempts to raise capital. As the first supervisor for the Waihi Company, he investigated new treatment processes, but resigned his position shortly before cyanide was proved to the ideal one. At Thames, his ‘gigantic’ scheme was to work the low levels, and at Te Aroha he attempted to develop a large area of unpayable ground. All his schemes depended not only on attracting overseas capital but on obtaining concessions from both government and union. His last efforts to develop mining on a massive scale were at Waihi, in the early twentieth century.
Walker was seen as being a skilled and practical miner, whose opinions were taken seriously. On behalf of investors, he investigated some new areas, and achieved fame for exposing an attempted fraud near Wellington. He attempted to assist the interests of the industry, and urged the need for capital and labour to work together harmoniously. He was outspokenly critical of the Liberal Government’s mining legislation, which he claimed scared capital away. 
He could be arrogant, as illustrated on several occasions, notably when participating in shooting matches in the early 1870s. And a question must be raised about his treatment of his first wife. But as a mine manager, he excelled, even if his schemes to work large areas were over-sanguine and lacked credibility both because he did not understand the geology and because he over-estimated his ability to raise capital and to get his way with both government and the union.

year: 2016

title: Spill-over of sustainability values and practices - a psychology PhD thesis proposal

authors: Rua, Mohi

subjects: Maori

abstract: The following presentation relates to my proposed PhD topic. As an audience you’re probably reading the title and wondering what relevance my topic has to the symposium theme Claiming Spaces. My immediate response is ‘nothing’. Nada, zilch, kore. As a ‘fill-in’ speaker for a presenter unable to be here, I’m reminded that despite my topics irregularity in the programme, I claim a space as both a psychologist and Maori person seeking to work with in the field of sustainability and conservation. Psychologists and Maori are interested in more than mental health and clinical investigation. We are interested in how the world goes around and seek to claim a space here too. So, this symposium and my participation DOES have relevance and I’d like to acknowledge those who remind me so. Let’s take a peep into my world for the next 3 years.

text: Spill-over of sustainability values and practices - a psychology PhD thesis proposal The following presentation relates to my proposed PhD topic. As an audience you’re probably reading the title and wondering what relevance my topic has to the symposium theme Claiming Spaces. My immediate response is ‘nothing’. Nada, zilch, kore. As a ‘fill-in’ speaker for a presenter unable to be here, I’m reminded that despite my topics irregularity in the programme, I claim a space as both a psychologist and Maori person seeking to work with in the field of sustainability and conservation. Psychologists and Maori are interested in more than mental health and clinical investigation. We are interested in how the world goes around and seek to claim a space here too. So, this symposium and my participation DOES have relevance and I’d like to acknowledge those who remind me so. Let’s take a peep into my world for the next 3 years.

year: 2008