A mathematical model of the evolution of individual differences in developmental plasticity arising through parental bet‐hedging

Children vary in the extent to which their development is shaped by particular experiences (e.g. maltreatment, social support). This variation raises a question: Is there no single level of plasticity that maximizes biological fitness? One influential hypothesis states that when different levels of plasticity are optimal in different environmental states and the environment fluctuates unpredictably, natural selection may favor parents producing offspring with varying levels of plasticity. The current article presents a mathematical model assessing the logic of this hypothesis – specifically, it examines what conditions are required for natural selection to favor parents to bet‐hedge by varying their offspring's plasticity. Consistent with existing theory from biology, results show that between‐individual variation in plasticity cannot evolve when the environment only varies across space. If, however, the environment varies across time, selection can favor differential plasticity, provided fitness effects are large (i.e. variation in individuals’ plasticity is correlated with substantial variation in fitness). Our model also generates a novel restriction: Differential plasticity only evolves when the cost of being mismatched to the environment exceeds the benefits of being well matched. Based on mechanistic considerations, we argue that bet‐hedging by varying offspring plasticity, if it were to evolve, would be more likely instantiated via epigenetic mechanisms (e.g. pre‐ or postnatal developmental programming) than genetic ones (e.g. mating with genetically diverse partners). Our model suggests novel avenues for testing the bet‐hedging hypothesis of differential plasticity, including empirical predictions and relevant measures. We also discuss several ways in which future work might extend our model.     

psiTurk: An open-source framework for conducting replicable behavioral experiments online

Online data collection has begun to revolutionize the behavioral sciences. However, conducting carefully controlled behavioral experiments online introduces a number of new of technical and scientific challenges. The project described in this paper, psiTurk, is an open-source platform which helps researchers develop experiment designs which can be conducted over the Internet. The tool primarily interfaces with Amazon’s Mechanical Turk, a popular crowd-sourcing labor market. This paper describes the basic architecture of the system and introduces new users to the overall goals. psiTurk aims to reduce the technical hurdles for researchers developing online experiments while improving the transparency and collaborative nature of the behavioral sciences.     

The Narcissistic dynamics of submission: the attraction of the powerless to authoritarian leaders

Ferenczi’s conception of identification with the aggressor, which describes children’s typical response to traumatic assaults by family members, provides a remarkably good framework to understand mass social and economic trauma. In the moment of trauma, children instinctively submit and comply with what abusers want—not just in behavior but in their perceptions, thoughts, and emotions—in order to survive the assault; afterwards they often continue to comply, out of fear that the family will turn its back on them. Notably, a persistent tendency to identify with the aggressor is also typical in children who have been emotionally abandoned by narcissistically self-preoccupied parents, even when there has not been gross trauma. Similarly, large groups of people who are economically or culturally dispossessed by changes in their society typically respond by submitting and complying with the expectations of a powerful figure or group, hoping they can continue to belong—just like children who are emotionally abandoned by their families. Not surprisingly, emotional abandonment, both in individual lives and on a mass scale, is typically felt as humiliating; and it undermines the sense that life is meaningful and valuable.

But the intolerable loss of belonging and of the feeling of being a valuable person often trigger exciting, aggressive, compensatory fantasies of specialness and entitlement. On the large scale, these fantasies are generally authoritarian in nature, with three main dynamics—sadomasochism, paranoid–schizoid organization, and the manic defense—plus a fourth element: the feeling of emotional truth that follows narcissistic injury, that infuses the other dynamics with a sense of emotional power and righteousness. Ironically, the angry attempt to reassert one’s entitlements ends up facilitating compliance with one’s oppressors and undermining the thoughtful, effective pursuit of realistic goals.

     

Low-Income Parental Risk and Engagement in Early Childhood and Child Social-Emotional Functioning in Middle Childhood

Journal of Child and Family Studies - The present study examined the association between fathers’ and mothers’ additive risk during early childhood and children’s social-emotional...     

Coparenting and Children's School Readiness: A Mediational Model

We examined the long‐term direct and indirect links between coparenting (conflict, communication, and shared decision‐making) and preschoolers' school readiness (math, literacy, and social skills). The study sample consisted of 5,650 children and their biological mothers and fathers who participated in the Early Childhood Longitudinal Study‐Birth Cohort. Using structural equation modeling and controlling for background characteristics, we found that our conceptual model of the pathways from coparenting to child outcomes is structurally the same for cohabiting and married families. Controlling for a host of background characteristics, we found that coparenting conflict and shared decision‐making were negatively and positively, respectively, linked to children's academic and social skills and co‐parental communication was indirectly linked to academic and social skills through maternal supportiveness. Coparenting conflict was also indirectly linked to children's social skills through maternal depressive symptoms. The overall findings suggest that for both cohabiting and married families, the context of conflicted coparenting may interfere with the development of children's social competencies and academic skills, whereas collaborative coparenting promotes children's school readiness because mothers are more responsive to their children's needs. These findings have implications for programs aimed at promoting positive family processes in cohabiting and married families.     

Hand position alters vision by biasing processing through different visual pathways

The present study investigated the mechanisms responsible for the difference between visual processing of stimuli near and far from the observer's hands. The idea that objects near the hands are immediate candidates for action led us to hypothesize that vision near the hands would be biased toward the action-oriented magnocellular visual pathway that supports processing with high temporal resolution but low spatial resolution. Conversely, objects away from the hands are not immediate candidates for action and, therefore, would benefit from a bias toward the perception-oriented parvocellular visual pathway that supports processing with high spatial resolution but low temporal resolution. We tested this hypothesis based on the psychophysical characteristics of the two pathways. Namely, we presented subjects with two tasks: a temporal-gap detection task which required the high temporal acuity of the magnocellular pathway and a spatial-gap detection task that required the spatial acuity of the parvocellular pathway. Consistent with our prediction, we found better performance on the temporal-gap detection task and worse performance on the spatial-gap detection task when stimuli were presented near the hands compared to when they were far from the hands. These findings suggest that altered visual processing near the hands may be due to changes in the contribution of the two visual pathways.     

Perceptual and cognitive characteristics of common playing cards

We examined the perceptual and cognitive characteristics of the playing cards commonly used in the Western world. Specifically, we measured their visibility, memorability, likability, and verbal and visual accessibility. Based on visibility and memorability, four groups of cards were distinguished: the Ace of Spades, other Aces, number cards, and face cards. Within each of these groups, there were few differences due to value or suit. Based on likability and accessibility, three additional groups were distinguished: the Ace of Hearts, Queen of Hearts, and King of Hearts. Several interesting relations were found between how people remember, like, and access cards; some of these were similar to effects found in studies of visual perception, while others seemed entirely new. Our results demonstrate that rigorous examination of real-world stimuli can shed light on the perception of ordinary objects, as well as help us understand why magic works in the mind.     

Consumer complaints and recovery through guaranteeing self‐service technology

Self‐service technologies are shaping the future of consumer behaviour, yet consumers often experience service failure in this context. This conceptual paper focuses on self‐service technology failure and recovery. A consumer perspective is taken. Recovering from self‐service technology failure is fraught with difficulty, mainly because of the absence of service personnel. The aim of this paper is to present a theoretical framework and associated research propositions in respect to the positive role that service guarantees can play in the context of self‐service technology failure and recovery. It contributes to the consumer behaviour domain by unifying the theory pertaining to consumer complaint behaviour, service recovery, specifically consumers' perceptions of justice, and service guarantees, which are set in a distinctive self‐service technology context. It is advanced that service guarantees, specifically multiple attribute‐specific guarantees, are associated with consumer voice complaints following self‐service technology failure, which is contingent on the attribution of blame in the light of consumers' production role. Service guarantees are argued to be associated with consumers' perceptions of just recovery in the self‐service technology context when they promise to fix the problem, compensate only when the problem cannot be remedied, offer a choice of compensation that is contingent on failure severity, afford ease of invocation and collection, and provide a personalised response to failures. Previous classifications of SSTs are used to highlight the applicability of guarantees for different types of SSTs. Managerial implications based on the theoretical framework are presented, along with future research directions. Copyright © 2011 John Wiley & Sons, Ltd.     

The Association between Positive Parenting and Externalizing Behavior

The present study examined the role of positive parenting on externalizing behaviors in a longitudinal, genetically informative sample. It often is assumed that positive parenting prevents behavior problems in children via an environmentally mediated process. Alternatively, the association may be due to either an evocative gene-environment correlation, in which parents react to children's genetically-influenced behavior in a positive way, or a passive gene-environment correlation, where parents passively transmit a risk environment and the genetic risk factor for the behavioral outcome to their children. The present study estimated the contribution of these processes in the association between positive parenting and children's externalizing behavior. Positive parenting was assessed via observations at ages 7, 9, 14, 24, and 36 months and externalizing behaviors were assessed through parent report at ages 4, 5, 7, 9, 10, 11, and 12 years. The significant association between positive parenting and externalizing behavior was negative, with children of mothers who showed significantly more positive parenting during toddlerhood having lower levels of externalizing behavior in childhood; however, there was not adequate power to distinguish whether this covariation was due to genetic, shared environmental, or nonshared environmental influences.