Examining the Link Between the Human Microbiome and Antisocial Behavior: Why Criminologists Should Care About Biochemistry,Too

Objective: The expansion of technology enables closer examination of human biological functioning which has exponentially increased knowledge about how the human organism interacts with surrounding environs to produce certain behaviors. The contemporary biosocial model pushes crime theorists and researchers alike to consider the many biological factors that may be implicated in violent behavior and how those factors are ameliorated or exacerbated by environmental influences (and vice versa). This paper describes the human microbiome and discusses why and how the human microbiome should be incorporated into biosocial investigations of violent behavior.

Method: To date, a fairly significant knowledge-base has accumulated regarding the evolutionary, genetic, and sociological bases of violent behavior but has not yet carefully considered other factors related to biochemistry: namely, the microbiome. We review the emerging literature on the role of the microbiome on phenotypes––particularly antisocial behavior––and synthesize the contribution of this literature to the study of antisocial behavior.

Results: The microbiome is likely an important contributor to animal and human behavior. Recent studies show that the microbiome holds promise in explaining antisocial behavior among a wide range of species including humans.

Conclusion: Criminological theory and public policy can incorporate knowledge about the microbiome in the explanation of violent behavior, and prevention and intervention efforts.     

What We Don’t Know May Hurt Us: An Examination of Systematic Bias in Offender Risk Assessments

Many issues are known to plague the validity of risk assessment, but empirical scholarship in criminal justice has not yet directly investigated how they influence prediction accuracy. This study explores how frequently risk assessment staff classifies information to be insufficient and the extent to which systematic error impacts the validity of risk prediction. Using Oregon’s Juvenile Crime Prevention Risk Assessment Instrument, we identified critical missing risk information and infused the dataset with varying levels of error. Classification outcomes and overall prediction accuracy reacted unfavorably, suggesting that the common practice of knowingly and unknowingly underestimating risk may be highly pernicious.     

Antisocial Process Screening Device Subscales Predict Recidivism in an Australian Juvenile Offender Sample

The present study is the first to examine the psychometric properties of the self-report Antisocial Process Screening Device (APSD-SR), and the predictive utility of its subscales for reoffending, among Australian juvenile offenders (N?= 308, M age = 17.00, SD?=?1.49). Exploratory factor analysis supported a modified three-factor structure in which four items loaded differently to prior studies. Total APSD-SR and modified subscale scores were positively associated with criminal history and mental health problems (e.g., internalizing and externalizing problems, alcohol and substance abuse/dependence). Survival analyses indicated that youth scoring high on the APSD-SR total score were faster to reoffend nonviolently (Hazard Ratio [HR]?= 1.31, p?=?.0003) and violently (HR?=?1.42, p?=?.0003) than those scoring low. Whereas the modified grandiose-manipulative subscale predicted faster time to nonviolent recidivism (HR?=?1.18, p?=?.026) as a single predictor, when all subscales were simultaneously entered into the model only callous-unemotional (CU) traits and impulsivity predicted nonviolent recidivism (HR?=?1.19, p?=?.026 and 1.22, p?=?.015, respectively), and only impulsivity predicted violent recidivism (HR?=?1.26, p?=?.014). Findings inform current understanding of the relative contribution of adolescent psychopathy dimensions to designating a particularly high-risk group of Australian youth in custody.     

Detection,not perception: A reply to Glazer

This article responds to Glazer’s claim that signals must be perceptible as well as his purported counterexample to my conditions for signaling. I defend a broader sense of signal detection that allows for imperceptible signals. While we disagree over the belief-signaling thesis, Glazer and I have great agreement over the social functions of belief.     

Distinguishing the Ratio Bias from Unsystematic Error: Situation and Individual‐difference Effects

People often perceive the occurrence of events to be less likely when the likelihood of the event is expressed in ratios consisting of smaller numbers versus larger numbers, an effect known as the ratio bias. This work presents a theoretical framework for the conditions that need to be met for the ratio bias to occur. In doing so, we contrast effects on the ratio bias to those on unsystematic error, which have often been confounded in previous research. We find that the ratio bias is weaker (1) when both sets of numbers are relatively large than when both sets of numbers are relatively small; (2) for scenarios involving lottery tickets than for scenarios involving drawing balls from a bin; and (3) when a physical display depicting the numbers is provided to participants. Each of these factors reduced the ratio bias without reducing unsystematic error. Additionally, we show that unsystematic error is lower among people who (1) reason on the basis of proportions rather than on the basis of the numerator and denominator individually; (2) score higher on the rational scale of the Rational–Experiential Inventory; and (3) are of higher numeracy. We use these results to distinguish causes of error generally from those on the ratio bias specifically and discuss the implications for our understanding of when the ratio bias occurs. Copyright © 2018 John Wiley & Sons, Ltd.     

Time Will Fly During Future Fun (But Drag Until Then)

Consumers’ lives are filled with scheduled events—both positive and negative. The current research examines how the valence of future scheduled events colors consumers’ temporal judgments in relation to such events: the time until their onset, the time during the events, and the time until their offset. We propose that the lay theory espousing “time flies when you’re having fun” leads consumers to judge that positive (vs. negative) future events of equivalent objective distance and duration are farther away and shorter. Operating in tandem, these elements produce two novel phenomena: (a) The end of positive and negative events can feel similarly far from the present, and (b) The beginning and end of positive events can feel similarly far from the present, whereby, in some circumstances, the event’s duration is effectively eliminated in the mind’s eye. Four studies provide evidence for these predictions, informing future directions regarding prospective time perception.     

The temporal structure of goal-directed and habitual operant behavior

Operant behavior can reflect the influence of goal-directed and habitual processes. These can be distinguished by changes to response rate following devaluation of the reinforcing outcome. Whether a response is goal directed or habitual depends on whether devaluation affects response rate. Response rate can be decomposed into frequencies of bouts and pauses by analyzing the distribution of interresponse times. This study sought to characterize goal-directed and habitual behaviors in terms of bout-initiation rate, within-bout response rate, bout length, and bout duration. Data were taken from three published studies that compared sensitivity to devaluation following brief and extended training with variable-interval schedules. Analyses focused on goal-directed and habitual responding, a comparison of a habitual response to a similarly trained response that had been converted back to goal-directed status after a surprising event, and a demonstration of contextual control of habit and goal direction in the same subjects. Across experiments and despite responses being clearly distinguished as goal directed and habitual by total response rate, analyses of bout-initiation rate, within-bout rate, bout length, and bout duration did not reveal a pattern that distinguished goal-directed from habitual responding.     

Intelligence: new findings and theoretical developments

We review new findings and new theoretical developments in the field of intelligence. New findings include the following: (a) Heritability of IQ varies significantly by social class. (b) Almost no genetic polymorphisms have been discovered that are consistently associated with variation in IQ in the normal range. (c) Much has been learned about the biological underpinnings of intelligence. (d) "Crystallized" and "fluid" IQ are quite different aspects of intelligence at both the behavioral and biological levels. (e) The importance of the environment for IQ is established by the 12-point to 18-point increase in IQ when children are adopted from working-class to middle-class homes. (f) Even when improvements in IQ produced by the most effective early childhood interventions fail to persist, there can be very marked effects on academic achievement and life outcomes. (g) In most developed countries studied, gains on IQ tests have continued, and they are beginning in the developing world. (h) Sex differences in aspects of intelligence are due partly to identifiable biological factors and partly to socialization factors. (i) The IQ gap between Blacks and Whites has been reduced by 0.33 SD in recent years. We report theorizing concerning (a) the relationship between working memory and intelligence, (b) the apparent contradiction between strong heritability effects on IQ and strong secular effects on IQ, (c) whether a general intelligence factor could arise from initially largely independent cognitive skills, (d) the relation between self-regulation and cognitive skills, and (e) the effects of stress on intelligence.     

Peer network drinking predicts increased alcohol use from adolescence to early adulthood after controlling for genetic and shared environmental selection

Research consistently links adolescents' and young adults' drinking with their peers' alcohol intake. In interpreting this correlation, 2 essential questions are often overlooked. First, which peers are more important, best friends or broader social networks? Second, do peers cause increased drinking, or do young people select friends whose drinking habits match their own? The present study combines social network analyses with family (twin and sibling) designs to answer these questions via data from the National Longitudinal Study of Adolescent Health. Analysis of peer nomination data from 134 schools (n = 82,629) and 1,846 twin and sibling pairs shows that peer network substance use predicts changes in drinking from adolescence into young adult life even after controlling for genetic and shared environmental selection, as well as best friend substance use. This effect was particularly strong for high-intensity friendships. Although the peer-adolescent drinking correlation is partially explained by selection, the present finding offers powerful evidence that peers also cause increased drinking. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

The Church in the World: Shifting Notions of Ecclesial Identity among North American Mennonites

Abstract : At mid‐century, Harold S. Bender's “The Anabaptist Vision” provided a definition of sixteenth‐century Anabaptist tradition that clarified the self‐understanding of its contemporary Mennonite heirs and by which their faithfulness to the tradition might be judged. Critics of the vision, such as J. Lawrence Burkholder, sought reformulations of the vision's central tension between separation from and integration into “the world,” calling for greater social responsibility and for a recognition that the ambiguities of human existence extend to the church, of necessity qualifying its lived expressions of radical discipleship.