Catching the Bad Guy: Morphing Composite Faces Helps

Composite faces built by eyewitnesses commonly are poor likenesses of the target face. When there are multiple witnesses, however, an opportunity exists to morph the composites. Morphs were rated as more similar to the target face than were the mean ratings of the individual composites. However, as hypothesized, the morph also came to resemble non-target faces more than the individual composites did (a prototype effect). This prototype effect was so strong that the morphs resembled non-targets more than the individual composites resembled the targets. In addition, morphing composites produced an attractiveness bias, which made the morphing of composites less effective for less attractive targets. Even when the prototype effect and the attractiveness bias were controlled for, however, a true morph-superiority effect continued to exist. The author won the Psi Chi/APS Albert Bandura Graduate Research Award in 2005--2006 for this study.     

Ventilatory and metabolic demands during aggressive physical restraint in healthy adults

We investigated ventilatory and metabolic demands in healthy adults when placed in the prone maximal restraint position (PMRP), i.e., hogtie restraint. Maximal voluntary ventilation (MVV) was measured in seated subjects (n=30), in the PMRP, and when prone with up to 90.1 or 102.3 kg of weight on the back. MVV with the heaviest weight was 70% of the seated MVV (122+/-28 and 156+/-38 L/min, respectively; p<0.001). Also, subjects (n=27) were placed in the PMRP and struggled vigorously for 60 sec. During the restrained struggle, ventilatory function (V(E)/ MVV) was 44% of MVV in the resting PMRP. While prone with up to 90.1 or 102.3 kg on the back, the decrease in MVV was of no clinical importance in these subjects. Also, while maximally struggling in the PMRP, V(E) was still adequate to supply the ventilatory needs.     

Using Gas Chromatography with Ion Mobility Spectrometry to Resolve Explosive Compounds in the Presence of Interferents*

Abstract: Ion mobility spectrometry (IMS) is a valued field detection technology because of its speed and high sensitivity, but IMS cannot easily resolve analytes of interest within mixtures. Coupling gas chromatography (GC) to IMS adds a separation capability to resolve complex matrices. A GC‐IONSCAN^® operated in IMS and GC/IMS modes was evaluated with combinations of five explosives and four interferents. In 100 explosive/interferent combinations, IMS yielded 21 false positives while GC/IMS substantially reduced the occurrence of false positives to one. In addition, the results indicate that through redesign or modification of the preconcentrator there would be significant advantages to using GC/IMS, such as enhancement of the linear dynamic range (LDR) in some situations. By balancing sensitivity with LDR, GC/IMS could prove to be a very advantageous tool when addressing real world complex mixture situations.     

Understanding how sexual offenders compare across psychiatric and correctional settings: examination of Canadian mentally ill sexual offenders

Abstract

Much of what is known about sexual offenders is based on correctional samples and then applied across settings based on the assumption that this group is homogeneous. In this study, 149 files were compared, including 108 cases from the forensic mental health system (FMH) and 41 cases from the correctional system (COR). Although many similarities were observed between the FMH and COR groups, the results also revealed important differences. The FMH group was characterised by more frequent hospitalisations, higher rates of major mental illness and single status. The COR group was characterised by a history of physical and sexual abuse, family history of addictions, more intrusive sexual offences and higher rates of offending. These results highlight different profiles for sexual offenders in forensic mental health and correctional settings and challenge us to consider the implications for assessment, treatment and risk management of this unique group of sexual offenders.     

Book Reviews

Jarol B. Manheim, All of the People all the Time: Strategic Communication and American Politics (New York: M.E. Sharpe, Inc., 1991), 255 pp. $25.00.

Harry C. Mansfield, Jr., America's Constitutional Soul (Baltimore, MD: Johns Hopkins Press, 1991), pp. 236.

Donald L. Horowitz, A Democratic South Africa? (Berkeley, CA: University of California Press, 1991), 293 pp. $24.95.     

Regional prosperities compared: Massachusetts and Baden-Württemberg in the 1980s

This article compares the relationship between economic development and public policy in two of the most prosperous regions of the 1980s: Massachusetts in the United States and Baden-Württemberg in West Germany. Beginning with a critique of the theory of the product life-cycle, the article examines the rise and fall of traditional industries in Massachusetts and their survival in Baden-Württemberg. It then goes on to consider the rise–but also the vulnerability–of the high-tech and financial firms in Massachusetts, as well as the more robust, though almost invisible growth of these sectors in Baden-Württemberg. The burden of the argument is that there are, strictly speaking, no ‘mature’ industries and public policies aimed at stimulating innovation are most successful when the latter is integrated into the local industrial structure as a whole rather than isolated into a distinct high-tech sector.     

Simulating commercial policy in a small,open dual economy with urban unemployment: A general equilibrium approach

A two‐sector numerical general equilibrium model calibrated on Kenyan data is used to consider second‐best tariff policy in an economy with a distorted market for urban‐industrial labour and urban unemployment. The results illustrate the sensitivity of second‐best policy to the way the administered urban wage is determined (whether it is fixed primarily in terms of food or the manufactured good), and to the degree of inter‐sectoral mobility of capital. Efficiency gains from moving to a second‐best policy are shown to be small in comparison with the gains from eliminating the wage distortion in the first place.     

Cultivated,caught, and collected: defining culturally appropriate foods in Tallé, Niger

The indigenous plants and fish of Niger are incorporated into the Songhai people's daily life but are largely underemphasised in development programmes. In this paper we describe the culturally appropriate foods of Tallé, Niger. Based on information obtained from 42 participants using interviews and focus groups, we identified 11 commonly consumed fish species, 22 plant species, and nine factors that made them culturally appropriate: taste, perceived health effects, economic value, use as snacks or staple, storability, seasonal availability, use in celebrations, abundance, and cultural identity. We conclude with a discussion of how local knowledge can be incorporated into development programmes.

Cultivés, pêchés et cueillis : définir des aliments culturellement appropriés à Tallé, au Niger

Les plantes et le poisson autochtones du Niger sont incorporés dans le quotidien des Songhais, mais on ne leur accorde généralement pas une attention suffisante dans les programmes de développement. Dans cet article, nous décrivons les aliments culturellement appropriés de Tallé, au Niger. Sur la base d'informations obtenues de 42 participants à l'aide d'entretiens et de groupes de réflexion, nous avons identifié 11 espèces de poisson fréquemment consommées, 22 espèces de plantes et neuf facteurs qui les rendent culturellement appropriés : goût, effets perçus sur la santé, valeur économique, utilisation comme en-cas ou denrées de base, facilité de conservation, disponibilité saisonnière, utilisation lors de célébrations, abondance et identité culturelle. Nous concluons par une discussion sur la manière dont les connaissances locales peuvent être incorporées dans les programmes de développement.

Cultivados, cazados y recolectados: la definición de alimentos culturalmente adecuados en Tallé, Níger

Las plantas y los peces endémicos de Níger han sido incorporados a la dieta cotidiana del pueblo songhai. Sin embargo, dicha dieta recibe escasa atención de parte de los programas de desarrollo. En el presente artículo, los autores analizan aquellos alimentos culturalmente adecuados en Tallé, Níger. Apoyándose en la información recopilada entre 42 personas que participaron en entrevistas y en grupos de enfoque, los autores identificaron 11 variedades de peces consumidas con frecuencia, 22 especies de plantas, así como nueve factores que determinan que estos alimentos sean culturalmente adecuados: sabor, efectos percibidos en la salud, valor económico de los mismos, posibilidad de uso como tentempiés o como alimentos principales, período de almacenamiento, disponibilidad estacional, uso de los mismos en celebraciones, abundancia e identidad cultural. El ensayo concluye realizando un análisis acerca de cómo los conocimientos locales pueden ser incorporados a los programas de desarrollo.

Cultivados, colhidos e coletados: definindo alimentos culturalmente apropriados em Tallé, Níger

As plantas e peixes consumidos pelos indígenas de Níger estão incorporados na vida cotidiana das pessoas de Songhai mas, geralmente, recebem pouco destaque nos programas de desenvolvimento. Neste artigo, descrevemos os alimentos culturalmente apropriados de Tallé, Níger. Com base nas informações obtidas de 42 participantes utilizando entrevistas e grupos de enfoque, identificamos 11 espécies de peixe frequentemente consumidas, 22 espécies de plantas e nove fatores que os tornam culturalmente apropriados: paladar, percepção de seus efeitos na saúde, valor econômico, uso como aperitivo ou alimento básico, armazenagem, disponibilidade sazonal, uso em comemorações, abundância e identidade cultural. Concluímos com uma discussão de como o conhecimento local pode ser incorporado em programas de desenvolvimento.