Human Zombies are Metaphysically Impossible

Chalmers (The Conscious Mind, Oxford Unversity Press, Oxford 1996) has argued for a form of property dualism on the basis of the concept of a zombie (which is physically identical to normals), and the concept of the inverted spectrum. He asserts that these concepts show that the facts about consciousness, such as experience or qualia, are really further facts about our world, over and above the physical facts. He claims that they are the hard part of the mind-body issue. He also claims that consciousness is a fundamental feature of the world like mass, charge, etc. He says that consciousness does not logically supervene on the physical and all current attempts to assert an identity between consciousness and the physical are just as non-reductive as his dualism. They are simply correlations and are part of the problem of the explanatory gap. In this paper, three examples of strong identities between a sensation or a quale and a physiological process are presented, which overcome these problems. They explain the identity in an a priori manner and they show that consciousness or sensations (Q) logically supervene on the physical (P), in that it is logically impossible to have P and not to have Q. In each case, the sensation was predicted and entailed by the physical. The inverted spectrum problem for consciousness is overcome and explained by a striking asymmetry in colour space. It is concluded that as some physical properties realize some sensations or qualia that human zombies are not metaphysically possible and the explanatory gap is bridged in these cases. Thus, the hard problem is overcome in these instances.     

The callousness pathway to severe violent delinquency

Children and adolescents who exhibit a callous interpersonal style seem to be at risk for developing severe forms of violent behavior. Theoretical models suggest that children with low levels of temperamental fearfulness may be at increased risk for developing callous traits because they are relatively unaffected by punishment. This study examines hypotheses about the callousness pathway to severe violent delinquency in a cross‐sectional sample of 169 (97=males, 72=females) adjudicated adolescents. Structural equation modeling is used to test mediation models regarding the relation between temperamental fear, punishment concern, callousness, and severe violent delinquency. The findings of the study indicate that the relation between low levels of temperamental fear and increased callousness is mediated by a lack of concern about being punished for aggressive acts. Although low levels of fear and punishment concern were both related to increased levels of severe violent delinquency, increased levels of callousness mediated these relations. All findings remained significant after controlling for the potential confounds of gender, race, and social desirability. The results provide a heuristic for understanding the callousness pathway to severe violent behavior in youth. However, longitudinal investigations replicating these results are necessary before firm conclusions can be drawn. Aggr. Behav. 32:590–598, 2006. © 2006 Wiley‐Liss, Inc.     

Before the measurement of prejudice: Early psychological and sociological papers on prejudice

Given its renown, many psychologists and sociologists likely consider the publication of Gordon Allport's ( 1954 / 1979 ) seminal book The Nature of Prejudice as the inauguration of the psychological study of prejudice. However, we have uncovered rarely‐cited, published papers (starting in 1830) that provide a wealth of speculation on prejudice even before psychologists/sociologists attempted to measure it (circa 1925). Thus, this paper intends to discuss early published work on prejudice in psychology and sociology by focusing on three key questions: a) when did psychologists/sociologists recognize prejudice as a psychological phenomenon, b) when did psychologists/sociologists recognize prejudice as a phenomenon in need of study, and c) what were the historical and personal conditions that gave rise to the interest in prejudice? In short, the seeds of prejudice research were maturing for some time before Allport's seminal book and the first attitudinal studies on prejudice, although these earlier works are seldom cited. © 2010 Wiley Periodicals, Inc.     

Substance Use, Criminal Activity, and Mental Health Among Violent and Nonviolent Rural Probationers

Differences between violent and nonviolent probationers were examined in the growing, yet understudied, rural probation population. Violent rural probationers had higher rates of substance use, criminal activity, and mental health symptoms than did nonviolent rural probationers. Implications for practitioners are discussed.     

A general approach to causal mediation analysis

Traditionally in the social sciences, causal mediation analysis has been formulated, understood, and implemented within the framework of linear structural equation models. We argue and demonstrate that this is problematic for 3 reasons: the lack of a general definition of causal mediation effects independent of a particular statistical model, the inability to specify the key identification assumption, and the difficulty of extending the framework to nonlinear models. In this article, we propose an alternative approach that overcomes these limitations. Our approach is general because it offers the definition, identification, estimation, and sensitivity analysis of causal mediation effects without reference to any specific statistical model. Further, our approach explicitly links these 4 elements closely together within a single framework. As a result, the proposed framework can accommodate linear and nonlinear relationships, parametric and nonparametric models, continuous and discrete mediators, and various types of outcome variables. The general definition and identification result also allow us to develop sensitivity analysis in the context of commonly used models, which enables applied researchers to formally assess the robustness of their empirical conclusions to violations of the key assumption. We illustrate our approach by applying it to the Job Search Intervention Study. We also offer easy-to-use software that implements all our proposed methods.     

Building an evidence base for DSM-5 conceptualizations of oppositional defiant disorder and conduct disorder: introduction to the special section

The DSM-5 ADHD and Disruptive Behavior Disorders Work Group recently outlined a research agenda designed to support possible revisions to the diagnostic criteria for oppositional defiant disorder (ODD) and conduct disorder (CD). Some of the areas in need of further investigation include (a) examining the clinical utility of the current diagnostic system in girls, (b) further clarifying the developmental progression from ODD to CD, (c) determining whether facets of ODD symptoms can help explain heterotypic continuity and enhance predictive validity, (d) evaluating the clinical utility of a new subtyping scheme for CD on the basis of the presence of callous-unemotional traits, and (e) comparing the clinical utility of dimensional versus categorical conceptualizations of ODD and CD. This special section was organized in an attempt to provide data on these issues using a diverse array of longitudinal data sets consisting of both epidemiological and clinic-based samples that collectively cover a large developmental span ranging from childhood through early adulthood.     

ODD dimensions, ADHD, and callous-unemotional traits as predictors of treatment response in children with disruptive behavior disorders

To answer several questions pertinent to DSM-V, the authors examined the predictive validity of pretreatment oppositional defiant disorder (ODD) dimensions, attention-deficit/hyperactivity disorder (ADHD), and callous-unemotional (CU) traits in relation to several treatment outcomes in 177 children diagnosed with ODD or conduct disorder (CD). Multiple informants completed diagnostic interviews and rating scales at 6 assessment points (pretreatment to 3-year follow-up) to document emotional and behavioral outcomes. After controlling for pretreatment CD, the ODD dimension of hurtfulness was related to treatment-resistant CD, delinquent behaviors, and externalizing problems. In contrast, the ODD dimension tapping irritability was associated with treatment-resistant ODD, internalizing problems, and global functional impairment following treatment. Whereas pretreatment ADHD was associated with posttreatment ODD and social problems, it was unrelated to posttreatment CD symptoms and diagnosis. Contrary to predictions, CU traits were unrelated to any posttreatment outcomes after controlling for other covariates. These findings remained after controlling for measures of pretreatment global functional impairment.