Delay discounting mediates the association between posterior insular cortex volume and social media addiction symptoms

Addiction-like symptoms in relation to excessive and compulsive social media use are common in the general population. Because they can lead to various adverse effects, there is a growing need to understand the brain systems and processes that are involved in potential social media addiction. We focus on the morphology of the posterior subdivision of the insular cortex (i.e., the insula), because it has been shown to be instrumental to supporting the maintenance of substance addictions and problematic behaviors. Assuming that social media addiction shares neural similarities with more established ones and consistent with evidence from the neuroeconomics domain, we further examine one possible reason for this association—namely that insular morphology influences one's delay discounting and that this delay discounting contributes to exaggerated preference for immediate social media rewards and consequent addiction-like symptoms. Based on voxel-based morphometry techniques applied to MRI scans of 32 social media users, we show that the gray matter volumes of the bilateral posterior insula are negatively associated with social media addiction symptoms. We further show that this association is mediated by delay discounting. This provides initial evidence that insular morphology can be associated with potential social media addiction, in part, through its contribution to poor foresight and impulsivity as captured by delay discounting.     

Constraining the Ruler: On Escaping Han Fei's Criticism of Confucian Virtue Politics

One of Han Fei's most trenchant criticisms against the early Confucian political tradition is that, insofar as its decision-making process revolves around the ruler, rather than a codified set of laws, this process is the arbitrary rule of a single individual. Han Fei argues that there will be disastrous results due to ad hoc decision-making, relationship-based decision-making, and decision-making based on prior moral commitments. I lay out Han Fei's arguments while demonstrating how Xunzi can successfully counter them. In doing so, I argue that Xunzi lays out a political theory restricting the actions of the ruler through both the use of ritual and law, which allows him to develop a theory that legitimizes government while at the same time constraining itself. Xunzi's political theory makes important strides in its attempt to recognize the importance of the ruler as a moral exemplar while also restricting his control in the political process.     

Improving the Assessment of Implicit Motives Using IRT: Cultural Differences and Differential Item Functioning

Summary: The possible relationship between masculinity and creativity in college women was investigated through a battery of masculinity-femininity scales that tapped both manifest and latent masculinity, factorially derived clusters, and an ipsative measure. Two samples (n = 45 each) of women who had scored above the 75th percentile and below the 25th percentile respectively on two measures of creativity were used. High creative subjects scored higher on activity and described themselves as more masculine; indications are that they possess a broader, less stereotyped sex-role identity.     

Stress-Induced Drinking in Parents of Boys with Attention-Deficit-Hyperactivity Disorder: Heterogeneous Groups in an Experimental Study of Adult-Child Interactions

Research on whether parents of children with externalizing disorders are at elevated risk for alcohol problems is equivocal. To reduce this ambiguity, we examined how individual differences in stress reactivity might moderate the drinking behavior of such parents. Parents (119 mothers, 44 fathers) of ADHD sons interacted with different child confederates during each of two counter-balanced sessions. In one, the confederate portrayed a friendly, cooperative, “normal” boy; in the other, the confederate portrayed a “deviant” boy who exhibited behavior characteristic of externalizing disorders. Following each interaction, parents were given an opportunity for ad lib consumption of alcohol while anticipating a second interaction. Latent class analysis identified three subgroups of parents using distress scores and alcohol consumption: minimal stress reactivity; reacts to child deviance with increased distress, but not increased drinking; marked stress-induced drinking. Decisions about the nature and proper treatment of parents raising children with ADHD may be compromised by failure to attend to individual differences in stress reactivity and inclinations to use drinking to cope.     

Women Inmate Substance Abusers’ Reactivity to Visual Alcohol, Cigarette, Marijuana, and Crack-Cocaine Cues: Approach and Avoidance as Separate Dimensions of Reactivity

Despite the growing recognition for multidimensional assessments of cue-elicited craving, few studies have attempted to measure multiple response domains associated with craving. The present study evaluated the Ambivalence Model of Craving (Breiner et al. Alcohol Research and Health 23:197–206, 1999; Stritzke et al. 2007) using a unique cue reactivity methodology designed to capture both the desire to use (approach inclination) and desire to not consume (avoidance inclination) in a clinical sample of incarcerated female substance abusers. Participants were 155 incarcerated women who were participating in or waiting to begin participation in a nine-month drug treatment program. Results indicated that all four substance cue-types (alcohol, cigarette, marijuana, and crack cocaine) had good reliability and showed high specificity. Also, the validity of measuring approach and avoidance as separate dimensions was supported, as demonstrated by meaningful clinical distinctions between groups evincing different reactivity patterns and incremental prediction of avoidance inclinations on measures of stages of change readiness. Taken together, results continue to highlight the importance of measuring both approach and avoidance inclinations in the study of cue-elicited craving.