The measurement of psychopathy: dimensional and taxometric approaches

This article extends the debate over personality disorders as dimensional or taxonic phenomena to the study of psychopathy and relates this issue to questions surrounding whether behaviors or personality traits best represent psychopathy. Proponents of dimensional measurements of psychopathy consider personality traits to be important constructs of psychopathy, whereas proponents of taxometric measurements consider behaviors to be important characteristics of psychopathy. After a brief introduction to the measurement of psychopathy, taxometric and dimensional measurement techniques are explained, their assumptions addressed, and their strengths and weaknesses discussed. Empirical evidence for each technique is then critiqued, and methodological problems are described. It is argued that methodological problems of existing studies largely preclude conclusions regarding whether psychopathy is dimensional or taxonic. Suggestions for future research are provided to address some of these methodological limitations. This review informs readers about each measurement approach and identifies problems regarding the dimensional or taxonic measurement of psychopathy.     

In-Group Love Versus Out-Group Hate: Which Is More Important to Partisans and When?

Political Behavior - Recent evidence indicates that partisans discriminate against those from the opposing party. However, it is still unclear whether partisan out-group prejudice reveals a desire...     

A validation study for duct tape end matches

Fracture matches are considered to be the strongest association achievable in forensic examinations of glass, metal, wood, plastic, paint, tape, and other trace evidence. Despite being fairly routine examinations, few publications exist to support their admissibility in court. This study was designed, using duct tape as the fractured medium, to determine the validity and error rate associated with conducting end match (fracture match) examinations on this material. Five test designs, which varied either the source roll of tape or manner of separation (torn or cut) from the roll, were administered to four analysts with instructions to examine the assigned test sets for end matches. If an end match was not identified by the initial analyst, the entire test set was independently evaluated by the remaining three analysts. Results indicated that while tape grade did not hinder end match identification, the manner of separation could affect results.     

Death at high altitude in the hypobaric chamber

A small number of accidental and suicidal deaths have occurred in the hypobaric, or high altitude, chamber. A case of an unusual suicide in a hypobaric chamber is presented. The changes that resulted from decompression and hypoxia are discussed.     

Street children in North and Latin America: Preliminary data fromproyecto alternativos in Tegucigalpa and some comparisons with the U.S. case

The decade of the 1980s witnessed a dramatic transformation in the character of homelessness in the United States and elsewhere in the developed world. Whereas in previous decades the U.S. homeless were predominantly older, largely white, brokendown alcoholic men (or at least were stereotypified as such), today a sizable fraction are women and children. Indeed, women, children, and youth now comprise more than three-eighths of the total homeless population of the United States (Wright 1989). As the U.S. homeless have come to be comprised of proportionally more women and children, so have they come more and more to resemble the street populations of the Third World, where homelessness, family disorganization, exploitation, and abandonment of children have become increasingly important problems during the past decade.