Face recognition as a function of distance and illumination: A practical tool for use in the courtroom

Abstract

This paper describes a practical courtroom tool that provides insight in face recognition accuracy as a function of distance and illumination. Subjects were shown 3/4 target portraits with an exposition time of 12 seconds, immediately followed by a target-absent or target-present lineup of six full-face portraits. Subjects were asked to identify the target. Seven distances (3 to 40 meter) and nine illumination levels (0.3 to 3000 lux) were used which resulted in a 7?9 matrix, with in the cells a hit score and a false alarm score. From these rough data several other measures were derived, like d-prime, diagnostic value and some idealised scores. The scores represent the upper margins of recognition accuracy with the memory component reduced to a minimum. The results clearly indicate a systematic increase of recognition performance with decreasing distance and increasing illumination. The end result is a practical rule of thumb, the Rule of Fifteen: Even in ideal conditions the desired diagnostic value of 15 is reached at not more than 15 meters, not less than 15 lux.     

Walls of secrecy and silence

Research Summary Most analysts of the causes of the contemporary credit crunch have concluded that the supervising agencies failed in their duties. The same is true for studies of several major fraud scandals, including the Madoff affair and the Dutch construction fraud. The remedy seems immediately obvious: more and better regulation and supervision. However, this line of reasoning seems somewhat simplistic by ignoring the question of how illegal activities can remain hidden for many years from supervising agencies, victims, and bystanders. This research article argues that the problem also lies in the successful concealment of illegal activities by the perpetrators and in the presence of silence in their social environment. Policy Implications The cases analyzed in this article suggest that financial misconduct also could be controlled by breaking the conspiracies of silence. The strengthening of supervision is unlikely to be effective without simultaneous efforts to encourage people to speak out and to give them incentives to want to know and to tell the truth.     

Part one: Turnitin and the perils of entering the evil house of cheat at cheathouse.com

Abstract

Plagiarism is one of the most serious offences in the academic world. It has occurred as long as there have been teachers and students, but the recent growth of the Internet has made the problem much worse. Recent studies indicate that approximately 30% of all students may be plagiarising on every written assignment they complete. The “information technology revolution” is almost always presented as having cataclysmic consequences for education. In post‐secondary circles, perhaps the most commonly apprehended cataclysm is “Internet plagiarism”. Academics at all British universities and colleges can now test students’ work for cheating using the anti‐plagiarism program Turnitin. The program, run by the Joint Information Systems Committee and thought to be the first national system of its kind, offers free advice and a plagiarism detection service to all further education institutions in the UK. This article will try to: first, define exactly what plagiarism is; second, give examples and reports on samples of the new plagiarism detection software; and finally suggest strategies that lecturers can use before turning to the new software.     

Dyadic Variability in Mother-Adolescent Interactions: Developmental Trajectories and Associations with Psychosocial Functioning

Dyadic variability is considered to be a key mechanism in the development of mother-adolescent relationships, and low levels of dyadic flexibility are thought to be associated with behavior and relationship problems. The present observational study examined heterogeneity in the development of dyadic variability in mother-adolescent interactions and associations with psychosocial functioning. Dyadic variability refers to the range of emotional states during interactions of mother-adolescent dyads. During five annual home visits, 92 mother-adolescent dyads (M age T1 = 13; 65.2 % boys) were videotaped while discussing a conflict, and they completed several questionnaires on adolescents’ aggressive behavior and adolescents’ and mothers’ perceived relationship quality. Two types of dyads were distinguished: low variability dyads (52 %) and high decreasing variability dyads (48 %). Over time, high decreasing variability dyads were characterized by a broader emotional repertoire than low variability dyads. Moreover, these two dyad types had distinct developmental patterns of psychosocial adjustment. Over time, high decreasing variability dyads showed lower levels of adolescents’ aggressive behavior, and higher levels of perceived relationship quality than low variability dyads. These findings suggest that over time more dyadic variability is associated with less adjustment problems and a more constructive development of the mother-adolescent relationship. Adaptive interactions seem to be characterized by a wider range of emotional states and mothers should guide adolescents during interactions to express both positive and negative affect. Observing the dyadic variability during mother-adolescent interactions can help clinicians to distinguish adaptive from maladaptive mother-adolescent dyads.     

Moral development and recidivism: a meta-analysis

A meta-analysis of 19 studies (N = 15,992 offenders) showed a significant inverse relation between more mature moral development and recidivism. Moderator analyses revealed a larger effect size for moral cognition (r = .20) than for moral emotion (r = .11). Effect sizes for production measures (r = .57) were much larger than for recognition measures (r = .16) and unstructured (clinical) judgment (r = .10). Larger effect sizes were found for female delinquents (r = .32) than for male delinquents (r = .21). Only small differences in effect sizes were found between juvenile delinquents (r = .10) and adult delinquents (r = .16). Finally, self-report measures of recidivism revealed much larger effect sizes (r = .32) than official reports of recidivism (r = .09). The discussion focuses on the theoretical and practical meaning of the magnitude of the effect size for the relation between moral development and recidivism.     

Enabling freedom of expression in light of filtering measures imposed on Internet intermediaries: Squaring the circle?

This study considers the scope of the injunction a court may issue against an intermediary service provider with a view to preventing or terminating an infringement, particularly of an intellectual property right. The matter is studied in the light of the aim shared by the European Union and the Council of Europe to promote freedom of expression via communication networks. Despite technological progress and the emergence of software that are increasingly precise and ever better controlled in terms of their effects, implementation of a filtering measure appears difficult to reconcile with the right to freedom of expression. Consequently, the problematic comes down to this question: how do we do enough without doing too much?