Learning to use words: Event-related potentials index single-shot contextual word learning

Humans have the remarkable capacity to learn words from a single instance. The goal of this study was to examine the impact of initial learning context on the understanding of novel word usage using event-related brain potentials. Participants saw known and unknown words in strongly or weakly constraining sentence contexts. After each sentence context, word usage knowledge was assessed via plausibility ratings of these words as the objects of transitive verbs. Plausibility effects were observed in the N400 component to the verb only when the upcoming novel word object had initially appeared in a strongly constraining context. These results demonstrate that rapid word learning is modulated by contextual constraint and reveal a rapid mental process that is sensitive to novel word usage.     

An interruption in unconscious communication in the analytic couple

The authors describe an interruption in communication in the analyses of two patients, which gradually brings the analytic process to a halt/standstill. They propose several hypotheses for understanding this situation. One explanation is mutual identification of primitive superegos in the analytic couple which generates a moralizing effect thereby hindering investigation and discovery. They emphasize the importance of countertransference involvement which partly provokes this particular type of impasse. They also suggest the idea of shared acting out, with complementary participations of analyst and patient. In this way the analytic couple supports a 'bastion' which protects against the risk of breaking the omnipotence of patient and analyst or contributes to this omnipotence. Their shared unconscious phantasy feeds collusion linked to unconscious persecutory guilt. The authors also describe movements to break free from this impasse. The enclave created by the analytic couple is detected and subsequently worked through by way of the patient's contribution of dream material and the analyst's work with her countertransference.     

The Deal on Testosterone Responses to Poker Competition

The following study investigated the effect of poker competition on testosterone (T) responses. Thirty-two participants played one-on-one poker in a lab on campus. Saliva samples were obtained before and after the poker games. On average, participants produced a significant increase in T during the competition, with no difference between winners and losers. This study is the first of its kind to examine T responses in a gambling competition. Possible implications for destructive gambling behaviors are discussed.     

Evolution of the wealth gap in child development and mediating pathways: Evidence from a longitudinal study in Bogota,Colombia

Large gaps in cognition and language on the Bayley‐III between the top and bottom household wealth quartiles in 1,330 children aged 6–42 months in a representative sample of low‐ and middle‐income families in Bogota were previously shown. Maternal education and the home environment mediated these wealth effects, whereas height‐for‐age mediated a small amount of the language deficit only. At ages 6–8 years, we relocated 72% of the children and assessed their IQ on the WISC‐V, school achievement, and behavior to investigate the evolution of the wealth gaps and potential mediators. The wealth gap in IQ at 6–8 years was significantly larger than that in a factor combining Bayley‐III language and cognition at 6–42 months; whereas the gap in achievement was larger but not significantly. Moreover, in cross‐sectional analysis, the IQ gap increased from 6 to 8 years reaching over 1 SD. In contrast, the gap in behavior was not significant in either childhood stage. Parental education and early home environment remained major mediators of the wealth gap in IQ and achievement at 6–8 years; later home environment and attending private education also had an effect; and early height‐for‐age was no longer significant. The home environment partly mediated the effect of parental education on wealth. All mediators combined explained most of the variance in the wealth gap; the remaining gaps being not significant. Results highlight the importance of the early home environment and suggest that interventions focusing on that should have long‐term benefits. Also, continued intervention through to 8 years may be desirable. A video abstract of this article can be viewed at https://youtu.be/_U53iXNww3I .     

Fostering Contact After Historical Atrocities: The Potential of Moral Exemplars

Intergroup contact is a known remedy for complicated intergroup relations. At the same time, contact is rare in postconflict settings. In the present article, we examine whether exposure to narratives about moral exemplars (i.e., members of a perpetrator group who acted morally and in opposition to the passivity or aggression displayed by majority) could increase openness to contact among historical adversaries. In Study 1 (N = 73), presenting members of a historical perpetrator group with information about ingroup moral exemplars led to a decrease of prejudice towards individuals from a historical victim group, which, in turn, resulted in higher openness to contact with them. In Study 2 (N = 100) and 3 (N = 92), exposure to narratives about outgroup moral exemplars in a historically victimized group increased openness to contact with members of a perpetrator group. These effects were mediated by a decrease in prejudice (Studies 2 and 3) and by an increase in trust towards historical perpetrators (Study 2).     

Young People and Volunteerism: A Model of Sustained Volunteerism During the Transition to Adulthood

A model of sustained volunteerism in young people is proposed. The longitudinal study addresses the questions “Why do young people decide to continue to volunteer over an extended period of time?” There were 158 volunteers (82 female and 76 male). The volunteers completed measures of motivation to volunteer, integration, and satisfaction with the organization, merged effects due to voluntary service, social support, identity, and intention to volunteer on a first (Time 1) and a second research wave (Time 2). Results show that both dispositional and organizational variables are important in determining long-term volunteerism in young people and confirmed that role identity is the best predictor of intention to volunteer.     

The Motivations for and Outcomes of Employee Referrals

Research on employee referrals demonstrates positive outcomes for the recruited individual and the organization. However, little research addressed employees who make employment referrals, also known as employee recommenders. To address this gap in knowledge, we developed a conceptual model and present the theoretical basis for addressing the motivation of, and organizational outcomes associated with, employees who make employment recommendations. The model is based on the theories of word-of-mouth communication, cognitive dissonance, self-perception, and attitude change through self-persuasion. Partial support for the model was found in an experimental design simulating an employee referral situation. Results showed an increase in normative commitment of recommenders.     

An improved screw-free method for electrode implantation and intracranial electroencephalographic recordings in mice

We recently developed a glue-based method for the implantation of intracranial electrodes in mice. Our approach is to secure a preconstructed electrode array using a cyanoacrylate-based glue (similar to Krazy Glue). This method is applicable to both young and aging mice and is suitable for long-term electroencephalographic recordings. In the present experiment, we explored whether the glue-based method is capable of securing individual electrodes in addition to securing the electrode array. C57 black mice aged 25–35 days or 13–19 months were operated on under isoflurane anesthesia. Monopolar or bipolar electrodes were inserted independently in the ipsilateral hippocampal CA3 and entorhinal cortical areas, and they were fixed onto the skull using the glue together with dental acrylic, but without anchoring screws. We found that the implanted electrodes were stable and allowed repeat intracranial recordings and electrical stimulation in freely moving mice.