Framing the Ultimatum Game: Gender differences and autonomic responses

The present study aimed at investigating whether the way offers are framed in the Ultimatum Game (UG) affects behavioral and autonomic responses in men and women. The “I give you” and “I take” expressions were used as gain and loss frames, respectively. Skin conductance and heart rate were recorded as indices of autonomic activation in response to unfair, mid‐value, and fair offers. Acceptance rates were higher in men than in women under the gain frame. Moreover, men showed higher acceptance rates under the gain than under the loss frame with mid‐value offers, whereas women's choices were not affected by frame. On the physiological level, men produced differential autonomic response patterns during decision‐making when offers were presented under gain and loss framing. The “I take” frame, by acting as a loss frame, elicited in men the characteristic defensive response pattern that is evoked by aversive stimulation, in which increases in skin conductance are coupled with increases in heart rate. On the other hand, the “I give you” frame, by acting as a gain frame, elicited in men increases in skin conductance associated with prevailing heart rate deceleratory responses, reflecting a state of enhanced attention and orienting. In contrast, women's autonomic reactivity was not affected by frame, consistent with behavioral results. Phasic changes in heart rate were crucial in revealing differential functional significance of skin conductance responses under different frames in men, thus questioning the assumption that this autonomic measure can be used as an index of negative emotional arousal in the UG.     

The “simulation” of the facial expression of emotions in case of short and long stimulus duration. The effect of pre-motor cortex inhibition by rTMS

Embodied cognition model states that the “simulation process” is necessary to the recognition of emotional significance of face. The present research explored the contribution of frontal motor brain components (i.e. mainly premotor area) to embodied cognition by using rTMS stimulation, to produce a temporary disruption of this specific cortical site. Secondly, short and long stimulus duration conditions were included to verify the contribution of the “simulation process” in response to overt and covert emotional stimulus comprehension. Nineteen subjects were asked to detect emotion/no emotion (anger, fear, happiness, neutral) in these two experimental conditions, by using a backward masking procedure. Five-second rTMS (1 Hz) was delivered before the stimulus onset. False alarms (Fa) and RTs increased and Hits decreased when frontal premotor brain activity was disrupted, specifically in response to anger and fear, for both long and shortduration condition. Thus, the present results highlight the main role of the frontal motor system for emotion facial expression processing.     

Prosocial attitudes and empathic behavior in emotional positive versus negative situations: brain response (ERPs) and source localization (LORETA) analysis

The present research firstly investigated the neural correlates (ERPs, event-related potentials) of attitudes to engage in prosocial-helping behaviors, and secondly, it analyzed the relation between these brain-based potentials and personal profile (high vs. low empathic profile). It was considered the subjects’ behavior in response to specific emotional situations (positive vs. negative) in case it was required a possible prosocial intervention. Thirty-one subjects were invited to empathize with the emotional contexts (videotapes that reproduced two person’s exchanges) and to decide whether to intervene or not to support these persons. BEES questionnaire for empathic behavior was submitted to the subjects after the experimental session. ERP acquisition and LORETA source analysis revealed a negative ongoing deflection (N200 effect) more prefrontally distributed (dorsolateral prefrontal cortex) in response to prosocial intervention options mainly for negative and positive contexts. Moreover, a significant positive correlation was found between high-empathic profiles, intervention behaviors (higher frequency of interventions) and N200 amplitude (higher peak). These results highlight the role of emotions in prosocial behavior, since the N200 effect was considered a marker of the emotional significance of the interpersonal situation. Secondly, the empathic trait may explain the prosocial decisional processes: Higher empathic trait contributes to induce subject’s intervention behavior which in turn appears to be directly related to the cortical responsiveness within the prefrontal areas.     

Individual Differences in Spatial Memory and Striatal ChAT Activity among Young and Aged Rats

Individual differences in spatial memory among young and aged rats were assessed using memory tasks related to integrity of the hippocampus and the neostriatum. Relationships were then examined between measures of spatial memory and regional choline acetyltransferase (ChAT) activity, a marker for cholinergic integrity. Twenty-four-month-old Long-Evans rats were impaired in comparisons with 6-month-old rats on measures of place learning, working memory, reference memory, and perseveration in water-maze tasks. Aged rats that were impaired on one measure of memory, however, were not necessarily impaired on other measures. ChAT activity in the ventromedial and dorsolateral neostriatum of aged rats was significantly reduced in comparisons with young rats whereas no difference was found in the hippocampus. Aged rats with the most ChAT activity in the anterior ventromedial neostriatum performed best on the place-learning and reference memory tasks but also made the most perseverative errors on the working memory task. In addition, young and aged rats with the most ChAT activity in the anterior dorsolateral neostriatum were those with the least accurate working memory. No relationships were found between ChAT activity in the hippocampus and spatial memory. Thus age-related memory impairment has components that can be segregated by measuring relationships between cholinergic integrity in subregions of the anterior neostriatum and memory tasks with different strategic requirements.     

A processing fluency explanation of bias against migrants

This research investigated whether people are biased against migrants partly because they find migrants more difficult to cognitively process than nonmigrants. In Study 1, 181 undergraduate students evaluated migrant and nonmigrant members of two minimal groups and reported the difficulty that they experienced in thinking about each type of target. Participants rated migrants less positively than nonmigrants, and difficulty ratings partially mediated this effect. Study 2 (N = 191) replicated these findings and demonstrated similar findings for individuals who had been excluded from minimal groups. This evidence implies that migrant bias can be explained partly in terms of the difficulty that people have in processing information about migrants, and that it is related to migrants’ exclusion from their original group.     

A confirmatory study of the relations between workplace sexism,sense of belonging,mental health,and job satisfaction among women in male‐dominated industries

The present study investigated the mediating role of sense of belonging in the relations between workplace sexism and (a) mental health and (b) job satisfaction. Participants were 190 women from a large Australian trade union that represented mainly male‐dominated jobs. They completed an online survey that contained measures of sexism, sense of belonging in the industry, mental health, and job satisfaction. As predicted, sense of belonging mediated the associations between organizational sexism and both mental health and job satisfaction. In addition, sense of belonging mediated the association between interpersonal sexism and mental health. These results are discussed in relation to strategies for supporting women and mitigating the effects of sexism in male‐dominated workplaces. The Open Science Framework webpage for this project is at: https://osf.io/a3yqc/ .     

Emotions associated with counterfactual comparisons drive decision-making in Footbridge-type moral dilemmas

Based on the dual-process theory of moral judgment, it has been suggested that in Footbridge-type dilemmas the anticipation of the emotional consequences of causing intentional harm might contribute to the decision of rejecting utilitarian resolutions. However, no empirical data have been reported on the emotions felt by participants after their decisions, and the role played by emotions in Trolley-type dilemmas remains to be determined. The present study investigated the specific emotions engaged both after decision choices and after the generation of the counterfactual scenario in Trolley- and Footbridge-type dilemmas. The results support the idea that in Footbridge-type dilemmas decision-making is driven by the attempt to minimize the aversive emotional state evoked by the decision outcome. A greater increase in emotional intensity was found overall for Footbridge-type than Trolley-type dilemmas after the counterfactual generation following typical (non-utilitarian) choices, with guilt, regret, and shame being the emotions that increased most. Critically, in Footbridge-type dilemmas only, typical choices were predicted by the increase in regret intensity experienced after counterfactual generation.     

Interference with reelin signaling in the lateral entorhinal cortex impairs spatial memory

Entorhinal neurons receive extensive intracortical projections, and form the primary input to the hippocampus via the perforant pathway. The glutamatergic cells of origin for the perforant pathway are distinguished by their expression of reelin, a glycoprotein involved in learning and synaptic plasticity. The functional significance of reelin signaling within the entorhinal cortex, however, remains unexplored. To determine whether interrupting entorhinal reelin signaling might have consequences for learning and memory, we administered recombinant receptor-associated protein (RAP) into the lateral entorhinal cortex (LEC) of young Long-Evans rats. RAP prevents reelin from binding to its receptors, and we verified the knockdown of reelin signaling by quantifying the phosphorylation state of reelin’s intracellular signaling target, disabled-1 (DAB1). Effective knockdown of reelin signaling was associated with impaired performance in the hippocampus-dependent version of the water maze. Moreover, inhibition of reelin signaling induced a localized loss of synaptic marker expression in the LEC. These observations support a role for entorhinal reelin signaling in spatial learning, and suggest that an intact reelin signaling pathway is essential for synaptic integrity in the adult entorhinal cortex.     

The relationship between the need for closure and deviant bias: an investigation of generality and process

The need for closure predicts an evaluative bias against people whose opinions or behaviors deviate from those of other members of their social groups. In the present study, we investigated whether the relationship between the need for closure and deviant bias generalized to nonsocial stimuli, and we examined the process underlying this relationship. Sixty-one undergraduate students completed measures of the need for closure, the need for structure, intolerance for ambiguity, and the ability to be decisive and achieve cognitive structure. They then rated their liking for letters of the Latin alphabet ("A" & "B") whose locations were consistent and inconsistent with relevant categories ("A circle" and "B circle"). Participants liked category-inconsistent letters less than category-consistent letters. Measures related to the need for structure and closed-mindedness correlated positively with this deviant bias, whereas measures related to the ability to be decisive and achieve cognitive structure did not. These results imply that the relationship between the need for closure and deviant bias is a relatively basic and pervasive effect that is not unique to social deviance and is driven by the need for structure and closed-mindedness. Implications for social and nonsocial stimuli are discussed.