Validation of a Short Form of the Marlowe-Crowne for Use with Law Enforcement Personnel

This study cross-validates a 13-question version of the Marlowe-Crowne Social Desirability Scale proposed by Reynolds (1982), using law enforcement professionals (n?=?241). A rational is offered for the importance of scales of this nature being used to assess honesty, social desirability and self-deception. External validity indicators including concurrent measures of aggression and prejudice as well as prehire MMPI scales K and L on a subset of this sample (n?=?70) are reviewed. Correlations between the 13-question version of the Marlowe-Crowne and external measures demonstrate robust effect sizes and statistical significance. Comparisons are also examined between officer scores and students from another cross-validation study of the 13-question short form of the Marlowe-Crowne (Zook & Sipps, 1984). Conclusions are made in consideration of the importance of honesty in law enforcement testing as well as the need for better means of accounting for variance due to social desirability in testing. Future directions for research are suggested.     

Evaluation of extraction techniques for the forensic analysis of human scalp hair using gas chromatography/mass spectrometry (GC/MS)

Preliminary research using on-line supercritical fluid extraction/gas chromatography-mass spectrometry (SFE/GC-MS) has shown that the natural and artificial surface components of human scalp hair are reproducible and differentiable. Therefore, these components may be useful for individualization or determining demographic characteristics or both. However, it is not known how the efficiency and selectivity of on-line SFE/GC-MS compares to other extraction methods. In this study, ultrasound, Soxhlet, and pressurized-fluid extraction were used to extract 1 mg to 1.3 g portions of a composite hair sample taken from an Asian male between the ages of 10 and 18. Percent extractables ranged from 0.9% to 5.6%, depending on the solvent used, and tended to increase with solvent polarity. Chemical analysis using GC/MS showed that the extracts contained large proportions of free fatty acids, squalene, cholesterol, and various wax esters. Finally, comparisons to SFE/GC-MS showed that this method possesses adequate efficiency, no observable differences in selectivity, and greater potential for miniaturization.     

人脸检测在TI方案和海思方案中的灵活运用

人脸识别技术是由人脸检测和人脸识别两部分所组成。 人脸检测、定位及捕捉：软件从监控画面中利用特殊的算法找出人脸的位置，进行定位，再根据其特征估算出人脸的大小，最后进行分割。     

Religion and Misconduct in “Angola” Prison: Conversion,Congregational Participation,Religiosity, and Self-Identities*

Prior research tends to find an inverse relationship between inmates’ religion and misconduct in prison, but this relationship has lacked empirical explanation. We therefore propose the religion-misconduct relationship is mediated by inmates’ identity transformation on existential, cognitive, and emotional dimensions. To test the mediation, we conducted a survey of inmates at the Louisiana State Penitentiary (a.k.a. “Angola”). Controlling for inmates’ sociodemographic and criminal backgrounds, we estimated a latent-variable structural equation model of disciplinary convictions. Results showed that inmates’ religious conversion and, to a lesser extent, religiosity itself were positively related to existential and cognitive transformations as well as a “crystallization of discontent,” which were in turn associated with two types of emotional transformation in the expected direction. The crystallization of discontent and transformation in negative affect were related to disciplinary convictions as hypothesized, and their mediation of the effects of conversion and religiosity on misconduct were found to be significant.