Insights from Ted Palmer: experimental criminology in a different era

Objectives  

Report insights from the career of the noted evaluation researcher, Ted Palmer, on emerging issues in correctional research and correctional treatment.     

Yield and turnover of illicit indoor cannabis (Cannabis spp.) plantations in Belgium

In prosecution, Belgian judiciary currently uses outdated yield figures (28.1g per plant, sold at € 3/g at grower level) for fining illicit indoor cannabis plantations. Using state-of-the-art cultivation techniques, our growth experiments showed that yield is better expressed in g/m(2) cultivated surface area rather than in g per plant, and that yield varies significantly between different cannabis strains. It was found that the lower-bound of the one-sided 95% confidence interval of the yield of an indoor cannabis plantation can be set at 575 g/m(2). Prices and pricing mechanisms were investigated using interviews with respondents selected through snowball sampling. Results reveal that (i) the Belgian cannabis market chain is highly complex; (ii) unit prices are predominantly determined by transaction sizes; but also (iii) a set of product- and socially-related price-fixing mechanisms have an equally important role. At grower level, respondents reported prices for 1 g of dry cannabis buds to range € 3.00-4.25.     

Raman spectroscopy and microspectrophotometry of reactive dyes on cotton fibres: Analysis and detection limits

A collaborative study on Raman spectroscopy and microspectrophotometry (MSP) was carried out by members of the ENFSI (European Network of Forensic Science Institutes) European Fibres Group (EFG) on different dyed cotton fabrics. The detection limits of the two methods were tested on two cotton sets with a dye concentration ranging from 0.5 to 0.005% (w/w). This survey shows that it is possible to detect the presence of dye in fibres with concentrations below that detectable by the traditional methods of light microscopy and microspectrophotometry (MSP). The MSP detection limit for the dyes used in this study was found to be a concentration of 0.5% (w/w). At this concentration, the fibres appear colourless with light microscopy. Raman spectroscopy clearly shows a higher potential to detect concentrations of dyes as low as 0.05% for the yellow dye RY145 and 0.005% for the blue dye RB221. This detection limit was found to depend both on the chemical composition of the dye itself and on the analytical conditions, particularly the laser wavelength. Furthermore, analysis of binary mixtures of dyes showed that while the minor dye was detected at 1.5% (w/w) (30% of the total dye concentration) using microspectrophotometry, it was detected at a level as low as 0.05% (w/w) (10% of the total dye concentration) using Raman spectroscopy. This work also highlights the importance of a flexible Raman instrument equipped with several lasers at different wavelengths for the analysis of dyed fibres. The operator and the set up of the analytical conditions are also of prime importance in order to obtain high quality spectra. Changing the laser wavelength is important to detect different dyes in a mixture.     

Victims' influence on intimate partner violence revictimization: an empirical test of dynamic victim-related risk factors

Research has reported that not only characteristics of the perpetrator but also characteristics of the victim influence risk for intimate partner violence (IPV). This would suggest that prevention of repeat abuse could benefit from a focus on both perpetrator and victim characteristics. Knowledge on factors that are within victims' sphere of influence is important because a focus on victim characteristics can help victims to take control of their situations and can thereby empower them. Dynamic victim-related factors are most relevant here as these are factors that can be changed or improved, in contrast to unchangeable static factors. Surprisingly, however, little is known about how victim-related factors affect risk for revictimization of IPV. The current study was conducted among a Dutch sample of 156 female, help-seeking IPV victims. The aim was to examine to what extent prior IPV and, in particular, dynamic victim-related factors influence risk for future IPV. In accordance with the models articulated by Foa, Cascardi, Zoellner and Feeny, we studied how the three key factors from their models-partner violence, victims' psychological difficulties, and victims' resilience-related to risk for IPV revictimization. Results provide support for several key factors (partner violence and victims' psychological difficulties) and, moreover, show which victim-related factors contribute to revictimization risk above and beyond the influence of prior violence committed by a partner against the victim (i.e., victims' prior IPV victimizations). Findings are discussed in terms of recommendations for practice and future research.     

Intergenerational transmission of longevity is not affected by other familial factors: evidence from 16,905 Dutch families from Zeeland, 1812-1962

ABSTRACT

Studies have shown that long-lived individuals seem to pass their survival advantage on to their offspring. Offspring of long-lived parents had a lifelong survival advantage over individuals without long-lived parents, making them more likely to become long-lived themselves. We test whether the survival advantage enjoyed by offspring of long-lived individuals is explained by environmental factors. 101,577 individuals from 16,905 families in the 1812–1886 Zeeland cohort were followed over time. To prevent that certain families were overrepresented in our data, disjoint family trees were selected. Offspring was included if the age at death of both parents was known. Our analyses show that multiple familial resources are associated with survival within the first 5 years of life, with stronger maternal than paternal effects. However, between ages 5 and 100 both parents contribute equally to offspring’s survival chances. After age 5, offspring of long-lived fathers and long-lived mothers had a 16-19% lower chance of dying at any given point in time than individuals without long-lived parents. This survival advantage is most likely genetic in nature, as it could not be explained by other, tested familial resources and is transmitted equally by fathers and mothers.     

Crashing the Party? Elites,Outsiders, and Elections

We consider an election between two parties that nominate candidates for office. The parties are polarized along a traditional cleavage, but they are also internally divided along a second issue dimension. We introduce a threat of entry from Outsider candidates, who have the prominence and resources to bypass party elites. We consider when voters will turn to Outsiders, and identify the conditions under which Outsiders will enter the election through an established party's nomination process, as opposed to circumventing established parties via a third-party challenge. We further explore when the elites will fail to respond to the threat of Outsider candidates. Our framework highlights how established parties will be especially vulnerable to Outsider primary entry in periods of intense ideological polarization between the parties, and that this vulnerability is especially heightened for the majority party.     

The Dilemmas of Frontline Staff Working With the Homeless: Housing First,Discretion, and the Task Environment

This article examines staff discretion in permanent supportive housing facilities run by a nonprofit agency claiming to use a Housing First approach. Field observation, archival data, and individual and group interviews with staff and clients were examined to better understand agency processes involved in intake, sanctions, and disposal of clients to evaluate Housing First fidelity. In their day-to-day interactions with clients, frontline workers' discretion is affected by working conditions such as lack of resources and heavy workloads, as well as by demands placed on the agency by members of its task environment. Implications for Housing First programs and homeless clients are discussed.     

The Effect of Family Violence on Sexual Victimization among Young Women

Young people who grow up in a violent family context are more vulnerable to become victims of sexual aggression outside the family context. The present study contributes to the understanding of the mechanisms that explain this link among young women by looking at the mediating role of sexual exposure behavior and target vulnerability. Data were used from an online survey among 237 young women aged 16 to 26 (M?=?21.0 years, SD?=?2.75). Experiencing violence from (one of) the parents and to a lesser extent witnessing interparental violence were related to an elevated risk for sexual victimization. Witnessing interparental violence was related to increased target vulnerability but this factor did not mediate the link with sexual victimization. Experiencing parental violence was related to both increased sexual exposure behavior and increased target vulnerability and these factors did mediate the link with sexual victimization.