Effectiveness of pupil diameter in a probable‐lie comparison question test for deception

Purpose. There were three objectives of this study: (1) To assess the possibility of using pupil diameter as an index of deception in the context of a comparison question polygraph test. (2) To determine if pupil diameter would make a significant contribution to an optimal multivariate classification equation in combination with the traditional predictor variables used in field polygraph practice. (3) We explored the possibility of replacing one or more of the traditional predictor variables with pupil diameter. Methods. We used a laboratory mock crime experiment with 24 participants, half of whom stole $20 (US) from a secretary's purse. Participants were tested with a comparison question test modelled after standard field practice. Physiological measures were taken with laboratory quality instrumentation. Features were extracted from the physiological measures. Those features were subjected to a number of different statistical analyses. Results. Innocent participants showed larger increases in pupil diameter in response to probable‐lie questions than to relevant questions. Guilty participants did not show differential responding to the question types. The additional of pupil diameter to a multivariate classification model approached, but did not reach significance. Subsequent analyses suggest that pupil diameter might be used to replace the traditional relative blood pressure measure. Conclusions. Pupil diameter was found to be a significant predictor variable for deception. Pupil diameter may be a possible replacement for the traditional relative blood pressure measure. Additional research to explore that possibility would seem to be warranted.     

The Relationship of Chronological Age, Age at Injury, and Duration of Injury to Employment Status in Individuals with Spinal Cord Injury

Employment status following spinal cord injury (SCI) has important implications for financial and psychosocial well-being. Several age-related variables-in particular chronological age, duration of SCI, and age at SCI onset-have been identified as being associated with employment among individuals with SCI. Cross-sectional investigations of this topic are complicated by methodological and statistical issues associated with aging and disability. The purpose of the current study was to examine the associations between three aging variables and employment status in individuals with SCI through a series of regression analyses. Six hundred twenty individuals with SCI completed a survey that included measures of demographic characteristics, pain, psychological functioning, physical functioning, fatigue, and sleep. The results indicated that chronological age and age at SCI onset were significant predictors of employment status. A significantly greater proportion of individuals aged 45-54 were employed compared to those aged 55-64 even after controlling for biopsychosocial variables. Additionally, there was a negative linear relationship between percent employed and age at SCI onset, and this relationship was not accounted for by the biopsychosocial variables. The analyses used in this study provide one method by which to disentangle the effects of different age-related variables on important SCI outcomes in cross-sectional research. Continued research in this area is needed to better understand age-related effects on employment status, which could be used to help maximize the quality of life in individuals with SCI.     

Correlates of the victim-offender relationship in homicide

Using a classification of homicides based on the victim-offender relationship, this research analyzes individual-level data from a local prosecutor's office in Taiwan with multinomial logistic regression to locate the more precise correlates of three different homicide relationship types. The results of the analyses provide further support for the hypothesis that such partitioning of homicides is fruitful in revealing the relationships otherwise obscured. They indicate that both sociodemographic variables and situational variables are important correlates of three different homicide relationships, but their strengths vary based on the particular homicide relationship type. Age and crime premises correlate with homicide differently based on the victim-offender relationship. Premeditation is related to acquaintance homicide but not to intimate homicide. In contrast, previous conviction is associated with intimate homicide but not with acquaintance homicide. The implication of the findings is discussed within the limitation of the data.     

The Republican Theories of Rousseau and the American Anti-Federalists

For almost four decades preceding the 1787-88 ratification debates — during which American Federalists drew severe criticism from the Anti-Federalists — Enlightenment politics in Europe had been undergoing equally severe criticism from Jean-Jacques Rousseau. Though largely unaware of each other, both of these critics advanced distinctive republican theories based on civic virtue and individual liberty. Rousseau argued for a republic which would require the near-total alienation of retained natural rights, abstention from bourgeois commerce, and complete conformity to the general will. The Anti-Federalists, by contrast, envisioned a republic based on retained natural rights, one that would reconcile the communitarian spirit of antiquity with the commercial values and individual rights of modernity. By comparing and contrasting the most salient features of these contending visions, whose theoretical trajectories are — I argue — crucially opposed, we can glimpse the inherent conflicting requisites of republican government and therewith some of the enduring dilemmas of republican theory.     

Firearm examination: Examiner judgments and computer‐based comparisons

Forensic firearm examination provides the court of law with information about the source of fired cartridge cases. We assessed the validity of source decisions of a computer‐based method and of 73 firearm examiners who compared breechface and firing pin impressions of 48 comparison sets. We also compared the computer‐based method's comparison scores with the examiners' degree‐of‐support judgments and assessed the validity of the latter. The true‐positive rate (sensitivity) and true‐negative rate (specificity) of the computer‐based method (for the comparison of both the breechface and firing pin impressions) were 94.4% and at least 91.7%, respectively. For the examiners, the true‐positive rate was at least 95.3% and the true‐negative rate was at least 86.2%. The validity of the source decisions improved when the evaluations of breechface and firing pin impressions were combined and for the examiners also when the perceived difficulty of the comparison decreased. The examiners were reluctant to provide source decisions for "difficult" comparisons even though their source decisions were mostly correct. The correlation between the computer‐based method's comparison scores and the examiners' degree‐of‐support judgments was low for the same‐source comparisons to negligible for the different‐source comparisons. Combining the outcomes of computer‐based methods with the judgments of examiners could increase the validity of firearm examinations. The examiners' numerical degree‐of‐support judgments for their source decisions were not well‐calibrated and showed clear signs of overconfidence. We suggest studying the merits of performance feedback to calibrate these judgments.     

The Politics of Discontinuity and Its Medium Term Policy Outcomes: Evidence from Ghana

ABSTRACT

It is common knowledge in Ghana that during political transitions, programs set in previous Medium Term Development Plans (MTDP) by prior governments are abandoned without regard for their wider national implications. While the economic impacts of these political transitions have been researched, till date no known studies have taken a holistic look at the relation between political transition and the level of MTDP target achievement. This article attempts to fill this research gap using Ghana as a case and the policy learning and political business cycle literatures as organizing frames. Using annual MTDP data and semi-structured interviews with 25 officials who were involved in the implementation of MDTPs at the national and local government levels, this article finds that aberrations in target achievements across the entire period between 2001 and 2016 were the result of financial constraints and the pressures to adjust to political change.