title: Understanding re-victimisation through an intersectional lens

authors: Tompson, Lisa

abstract: Policy efforts based on evidence about risk for re-victimisation both protect some of the most vulnerable people in society and have a good chance of reducing crime levels overall (Farrell and Pease, 1993; Grove et al., 2012; Pease et al., 2018). While research has established that the phenomenon of re-victimisation is ubiquitous, less is known about what makes some people more vulnerable to re-victimisation than others (Hamilton and Browne, 1998; Nazaretian and Fitch, 2021). Enhanced understanding of who these people are is thus crucial for developing contemporary victim-centred crime prevention policy.
Victimology theories suggest that people at high risk of victimisation are typified by multiple overlapping and intersecting personal characteristics (e.g., gender, age, race/ethnicity, class, disability status, sexual identity), rather than forming homogeneous higher-order groups (e.g., delineated by a single personal characteristic; Shoham et al, 2010; Walklate, 2012). Accordingly, in this study we examined socio-demographic characteristics (e.g., gender, age, ethnicity, disability status, sexual identity) of people who were re-victimised, with an emphasis on intersectionality. That is, we focused on identifying where the co-occurrence of socio-demographic characteristics intensified risk of re-victimisation.
We use re-victimisation as an umbrella term to cover:
• Poly-victimisation (i.e., >1 victimisation for different types of crime), and
• Repeat-victimisation (i.e., >1 victimisation for different types of crime) for 11 different crime types.
We therefore analysed 12 different types of re-victimisation over five waves of the New Zealand Crime and Victims Survey (NZCVS) in the privacy- and security-protected environment of Statistics New Zealand’s Integrated Data Infrastructure (IDI) with Conjunctive Analysis of Case Configurations. This method enabled us to position groups (i.e., combinations of characteristics) as the unit of analysis and identify where intersecting characteristics were associated with high rates of re-victimisation and isolate when particular individual characteristics were especially noteworthy.
This research makes four important contributions to the evidence base on victimisation. First, while re-victimisation experiences have been studied for a range of crime types internationally (see Farrell et al., 2005), this is the first research to do so for Aotearoa New Zealand. Second, it adds to the scant evidence base on poly-victimisation. Third, it corroborates the empirical findings from other countries that risk of re-victimisation increases cumulatively (Johnson et al., 1997), hence the need for policies and practices that get upstream of the problem and prevent re-victimisation at the earliest opportunity. Fourth, this research advances knowledge on how socio-demographic characteristics intersect to elevate risk of re-victimisation. The findings are relevant for policymakers developing victimisation prevention programmes across various organisations in Aotearoa New Zealand.

text: Understanding re-victimisation through an intersectional lens Policy efforts based on evidence about risk for re-victimisation both protect some of the most vulnerable people in society and have a good chance of reducing crime levels overall (Farrell and Pease, 1993; Grove et al., 2012; Pease et al., 2018). While research has established that the phenomenon of re-victimisation is ubiquitous, less is known about what makes some people more vulnerable to re-victimisation than others (Hamilton and Browne, 1998; Nazaretian and Fitch, 2021). Enhanced understanding of who these people are is thus crucial for developing contemporary victim-centred crime prevention policy.
Victimology theories suggest that people at high risk of victimisation are typified by multiple overlapping and intersecting personal characteristics (e.g., gender, age, race/ethnicity, class, disability status, sexual identity), rather than forming homogeneous higher-order groups (e.g., delineated by a single personal characteristic; Shoham et al, 2010; Walklate, 2012). Accordingly, in this study we examined socio-demographic characteristics (e.g., gender, age, ethnicity, disability status, sexual identity) of people who were re-victimised, with an emphasis on intersectionality. That is, we focused on identifying where the co-occurrence of socio-demographic characteristics intensified risk of re-victimisation.
We use re-victimisation as an umbrella term to cover:
• Poly-victimisation (i.e., >1 victimisation for different types of crime), and
• Repeat-victimisation (i.e., >1 victimisation for different types of crime) for 11 different crime types.
We therefore analysed 12 different types of re-victimisation over five waves of the New Zealand Crime and Victims Survey (NZCVS) in the privacy- and security-protected environment of Statistics New Zealand’s Integrated Data Infrastructure (IDI) with Conjunctive Analysis of Case Configurations. This method enabled us to position groups (i.e., combinations of characteristics) as the unit of analysis and identify where intersecting characteristics were associated with high rates of re-victimisation and isolate when particular individual characteristics were especially noteworthy.
This research makes four important contributions to the evidence base on victimisation. First, while re-victimisation experiences have been studied for a range of crime types internationally (see Farrell et al., 2005), this is the first research to do so for Aotearoa New Zealand. Second, it adds to the scant evidence base on poly-victimisation. Third, it corroborates the empirical findings from other countries that risk of re-victimisation increases cumulatively (Johnson et al., 1997), hence the need for policies and practices that get upstream of the problem and prevent re-victimisation at the earliest opportunity. Fourth, this research advances knowledge on how socio-demographic characteristics intersect to elevate risk of re-victimisation. The findings are relevant for policymakers developing victimisation prevention programmes across various organisations in Aotearoa New Zealand.

year: 2024

title: New Options for Hoeffding Trees

authors: Pfahringer, Bernhard

subjects: computer science

abstract: Hoeffding trees are state-of-the-art for processing high-speed data streams. Their ingenuity stems from updating sufficient statistics, only addressing growth when decisions can be made that are guaranteed to be almost identical to those that would be made by conventional batch learning methods. Despite this guarantee, decisions are still subject to limited lookahead and stability issues. In this paper we explore Hoeffding Option Trees, a regular Hoeffding tree containing additional option nodes that allow several tests to be applied, leading to multiple Hoeffding trees as separate paths. We show how to control tree growth in order to generate a mixture of paths, and empirically determine a reasonable number of paths. We then empirically evaluate a spectrum of Hoeffding tree variations: single trees, option trees and bagged trees. Finally, we investigate pruning. We show that on some datasets a pruned option tree can be smaller and more accurate than a single tree.

text: New Options for Hoeffding Trees Hoeffding trees are state-of-the-art for processing high-speed data streams. Their ingenuity stems from updating sufficient statistics, only addressing growth when decisions can be made that are guaranteed to be almost identical to those that would be made by conventional batch learning methods. Despite this guarantee, decisions are still subject to limited lookahead and stability issues. In this paper we explore Hoeffding Option Trees, a regular Hoeffding tree containing additional option nodes that allow several tests to be applied, leading to multiple Hoeffding trees as separate paths. We show how to control tree growth in order to generate a mixture of paths, and empirically determine a reasonable number of paths. We then empirically evaluate a spectrum of Hoeffding tree variations: single trees, option trees and bagged trees. Finally, we investigate pruning. We show that on some datasets a pruned option tree can be smaller and more accurate than a single tree.

year: 2007

title: Māori child rearing and infant sleep practices

authors: Jones, Horiana Majorie

abstract: Sleep is important to a healthy lifestyle for parents and children, and having effective ways of putting a child to sleep contributes significantly to mental and physical wellbeing. Cultural groups around the world have developed a variety of approaches to this task, for example, rocking, co-sleeping, bed-sharing, breastfeeding to sleep, and encouraging infants to self soothe through various methods of infant sleep training. In New Zealand the continuation of traditional Māori approaches to infant sleep, e.g. co-sleeping, bed-sharing, responsivity to infant cues have been over-shadowed by its negative association with sudden infant death syndrome (SIDS) and dependence on parent interaction when initiating infant sleep. In this study, we were interested in the approaches Māori parents used to put their pēpi (child, 2 months-2 years of age) to sleep and the various factors that have influenced these approaches. Data were collected through online surveys (n =58) and face-to-face interviews (n =10) with Māori parents. Survey results indicated that being held and breast or bottle fed to sleep were the most practiced techniques by Māori parents. Parent assisted approaches, e.g., rocking, feeding, lying with baby until they go to sleep, were the most practiced. Many parents planned for their babies to sleep separately but very few actually persisted with self-soothing approaches due to a number of factors, such as discomfort with listening to their babies cry, culture, whānau (extended families) influences safety, and convenience. The majority of participants expressed a desire for separate sleep; however, few within the interview group actually successfully practiced separate sleep regularly.

text: Māori child rearing and infant sleep practices Sleep is important to a healthy lifestyle for parents and children, and having effective ways of putting a child to sleep contributes significantly to mental and physical wellbeing. Cultural groups around the world have developed a variety of approaches to this task, for example, rocking, co-sleeping, bed-sharing, breastfeeding to sleep, and encouraging infants to self soothe through various methods of infant sleep training. In New Zealand the continuation of traditional Māori approaches to infant sleep, e.g. co-sleeping, bed-sharing, responsivity to infant cues have been over-shadowed by its negative association with sudden infant death syndrome (SIDS) and dependence on parent interaction when initiating infant sleep. In this study, we were interested in the approaches Māori parents used to put their pēpi (child, 2 months-2 years of age) to sleep and the various factors that have influenced these approaches. Data were collected through online surveys (n =58) and face-to-face interviews (n =10) with Māori parents. Survey results indicated that being held and breast or bottle fed to sleep were the most practiced techniques by Māori parents. Parent assisted approaches, e.g., rocking, feeding, lying with baby until they go to sleep, were the most practiced. Many parents planned for their babies to sleep separately but very few actually persisted with self-soothing approaches due to a number of factors, such as discomfort with listening to their babies cry, culture, whānau (extended families) influences safety, and convenience. The majority of participants expressed a desire for separate sleep; however, few within the interview group actually successfully practiced separate sleep regularly.

year: 2017