Online intergroup contact: the role of Allport’s conditions for majority and minority group members

Online interactions have become central in today’s digital age. Importantly, they provide social psychologists with new tools to tackle prejudice reduction among different social groups. Initial evidence shows that online contact has the potential to reduce conflicts between majority and minority groups. However, as it is quite clear for the offline environment, simple contact does not automatically lead to improved social relationships. On the contrary, negative consequences are also possible, as suggested by Gordon Allport (1954), who identified four optimal conditions that facilitate prejudice reduction through face-to-face intergroup contact: equal status, cooperation, common goals, and authority support. Although few scholars have recently turned to the investigation of online contact, we still know little about which variables play a distinctive role and about its consequences on the relationships between majority and minority social groups. More specifically, it is not yet clear whether Allport's conditions play a role in facilitating the effects of contact on prejudice even when intergroup interactions occur online. Furthermore, research on online intergroup contact has recently broadened its focus to intergroup relations between people with different sexual orientations. However, there is not yet sufficient evidence to draw firm conclusions about its effects in this intergroup context. Consequently, this thesis aims to investigate the role played by Allport's conditions in the intergroup contact that takes place online, with particular attention to the differences in their effect on sexual majority and minority social groups. To this end, this work is composed of three studies. Study 1 is a systematic review of the literature on online intergroup contact, which aimed to review studies investigating intergroup contact in online settings, with particular attention to the involvement of majority and minority social groups and the investigation/implementation of Allport's conditions in the contact. Results showed that studies on structured online contact implemented the conditions in very different and sometimes not comparable ways, that no studies have tested the effects of contact by comparing the presence with the absence of the conditions, and that no correlational study has investigated their effect in spontaneous and unstructured online contact. Results also showed that social minorities are widely underrepresented in online intergroup contact literature. Based on this evidence, Study 2 aimed to understand the role played by Allport’s conditions in an online intergroup structured interaction for sexual majority and minority social groups. To this end, we developed an intervention in which heterosexual and gay/bisexual participants (N = 149) interacted through a pre-programmed chat with an outgroup member in one of the three experimental conditions: Allport’s conditions activated, Allport’s conditions not activated, or control. Results showed that participants who interacted with the outgroup member when Allport’s conditions were activated reported more favorable intergroup attitudes than those who interacted with the outgroup member when Allport’s conditions were not activated and the control group. Furthermore, only when minority participants were added to the sample was this positive effect of the conditions also found on intergroup empathy. Finally, Study 3 aimed to investigate the role played by Allport’s conditions in online intergroup unstructured interactions on social media for sexual majority and minority social groups. To this end, heterosexual (n = 199) and gay/lesbian (n = 90) participants completed an online survey to assess the quality of online contact, Allport’s conditions, and intergroup outcomes. Results showed a three-way interaction between quality of contact, group status, and two of the four Allport’s conditions, namely common goals and equal status. For minority participants, when common goals and equal status were perceived as stronger, the positive relation between the quality of online contact and outgroup trust increased (while it decreased for majority participants). Looking at the overall results, the effect of Allport’s conditions in online intergroup contact, both structured and unstructured, appears to be quite weak. However, the role of the conditions seems more important for the minority social group. Although two studies are not sufficient to draw definitive conclusions, the present work carried out for the first time an empirical investigation of the role of Allport's conditions in both structured and unstructured online contact, comparing a majority and minority group

At the core of cyberaggression: A group-based explanation

In this study, prototypicality of the aggressor was tested as a group-level factor predicting social media users' active participation in cyberaggression. Participants were exposed to a fictitious conversation, in which either a prototypical versus non-prototypical user posted an aggressive comment as a reply to a provocative comment. In line with self-categorization theory, we hypothesized that bystander participants would post an aggressive comment and rate the aggression as acceptable to a greater extent in the prototypical than in the non-prototypical condition. Furthermore, we predicted that perceived normativity of aggression would mediate the effect of prototypicality. Results supported these predictions and showed that prototypical members affect the extent to which collective aggressive behaviors in online interactions are approved and enacted. These findings highlight the importance of group-level factors in the study of cyberaggression and provide important information for understanding the psychological underpinnings of collective forms of online aggression

Intraoperative β-Detecting probe for radio-guided surgery in tumour resection

The development of the β− based radio-guided surgery aims to extend the technique to those tumours where surgery is the only possible treatment and the assessment of the resection would most profit from the low background around the lesion, as for brain tumours. Feasibility studies on meningioma and gliomas already estimated the potentiality of this new treatment. To validate the technique, a prototype of the intraoperative probe detecting β− decays and specific phantoms simulating tumour remnant patterns embedded in healthy tissue have been realized. The response of the probe in this simulated environment is tested with dedicated procedures. This document discusses the innovative aspects of the method, the status of the developed intraoperative β− detecting probe and the results of the preclinical tests

Towards a Radio-guided Surgery with β−\beta^{-} Decays: Uptake of a somatostatin analogue (DOTATOC) in Meningioma and High Grade Glioma

A novel radio guided surgery (RGS) technique for cerebral tumors using $\beta^{-}$ radiation is being developed. Checking the availability of a radio-tracer that can deliver a $\beta^{-}$ emitter to the tumor is a fundamental step in the deployment of such technique. This paper reports a study of the uptake of 90Y labeled (DOTATOC) in the meningioma and the high grade glioma (HGG) and a feasibility study of the RGS technique in these cases.Comment: 21 pages, 5 figure

Measurement of charged particle yields from therapeutic beams in view of the design of an innovative hadrontherapy dose monitor

Particle Therapy (PT) is an emerging technique, which makes use of charged particles to efficiently cure different kinds of solid tumors. The high precision in the hadrons dose deposition requires an accurate monitoring to prevent the risk of under-dosage of the cancer region or of over-dosage of healthy tissues. Monitoring techniques are currently being developed and are based on the detection of particles produced by the beam interaction into the target, in particular: charged particles, result of target and/or projectile fragmentation, prompt photons coming from nucleus de-excitation and back-to-back γ s, produced in the positron annihilation from β + emitters created in the beam interaction with the target. It has been showed that the hadron beam dose release peak can be spatially correlated with the emission pattern of these secondary particles. Here we report about secondary particles production (charged fragments and prompt γ s) performed at different beam and energies that have a particular relevance for PT applications: 12C beam of 80 MeV/u at LNS, 12C beam 220 MeV/u at GSI, and 12C, 4He, 16O beams with energy in the 50–300 MeV/u range at HIT. Finally, a project for a multimodal dose-monitor device exploiting the prompt photons and charged particles emission will be presented

Psychological predictors of protective behaviours during the Covid\u201019 pandemic: Theory of planned behaviour and risk perception

The Covid-19 outbreak was declared a public health emergency by the World Health Organization in January 2020. As a consequence, several protective measures were urged by national governments in order to limit the spread of the pandemic. Drawing on the literature on health behaviours, in the present study, we investigated the psychological factors (i.e., attitudes, social norms, perceived behavioural control, intentions, and risk perception) that were associated with two highly recommended behaviours: frequent hand washing and social distancing (i.e., staying at home except for essential reasons). The study employed a correlational design with a follow-up. A questionnaire including measures of psychological predictors was administered via social media to a sample of 403 adults residing in Italy during the lockdown. Self-reported behaviours were assessed one week later. Findings showed that attitudes, social norms, perceived behavioural control were significantly related to hand washing and social distancing through intentions. Risk perception was a significant predictor of social distancing but not of hand washing. These findings suggest that intervention and communication strategies aimed at encouraging preventive measures during the Covid-19 pandemic should be organized taking into account multiple factors which partially differ depending on the type of behaviour considered. Please refer to the Supplementary Material section to find this article's Community and Social Impact Statement

Peptide fingerprinting of Hermetia illucens and Alphitobius diaperinus: Identification of insect species-specific marker peptides for authentication in food and feed

Insects have been proposed as new source of proteins to meet the growing demand connected to the increasing world population. In the EU the inclusion of insect proteins in feed and food is strictly regulated. Hence, analytical methods able to discriminate and identify different insect species in food and feed are a necessity. In this work, a peptidomic approach was applied to determine peptide biomarkers for two edible insect species: lesser mealworm and black soldier fly. Three species specific peptide biomarkers were identified using LC-MS/MS. The two insects were mixed with fish standard feed at different concentrations, to evaluate the feasibility of their use as markers in complex matrices. The detection of marker peptides was confirmed down to 1% insect amount. The data here reported constitutes the first proof of concept for the potential application of the peptide marker approach for the identification and quantification of insect ingredients

Managing the Unexpected: Bicultural Identity Integration During the COVID-19 Emergency

Unexpected and sudden emergency situations such as COVID-19 may render ethnic minorities particularly vulnerable to experiencing negative outcomes. Yet, we put forward that Bicultural Identity Integration (BII) – the degree to which bicultural individuals perceive their cultural identities as compatible and overlapping – may represent a resource in times of emergencies, since it may positively influence, through enhancement of psychological well-being, how bicultural individuals respond in terms of distress and coping strategies. Based on this assumption, the present study aimed at examining the relationship between BII and responses to COVID-19. N = 370 bicultural individuals (mean age = 26.83, SD = 8.74) from different cultural backgrounds were recruited online and completed measures of BII, psychological well-being, COVID-19 distress and coping strategies (positive attitudes, avoidance, social support seeking) during the second wave of the COVID-19 pandemic in Italy. We tested a model in which BII was the predictor, psychological well-being was the mediator and reactions to the COVID-19 emergency (distress, use of coping) were the outcomes. This model was tested against two alternative models. The proposed model showed a better fit to the data compared to the alternative models. In this model, psychological well-being mediated the relationship between BII (harmony) and coping strategies, except social support seeking. These findings highlight the important role played by BII in emergency situations, as it may indirectly, through enhancement of psychological well-being, contribute to enhance biculturals’ adaptive reactions in terms of distress as well as affect coping strategies during highly stressful events

Exploring the Adsorption of Pb on Microalgae-Derived Biochar: A Versatile Material for Environmental Remediation and Electroanalytical Applications

Biochar, a carbon material obtained by pyrolysis of biomasses, is increasingly applied in environmental remediation and sensing thanks to its functional properties, cost-effectiveness and eco-friendliness. The adsorption capacity of biochar, strictly dependent on its specific surface area, heteroatom doping and surface functional groups, is crucial for these applications. Here, biochar produced at low temperature (350 °C) from a marine microalga (Nannochloropsis sp.) is proposed as an efficient adsorbent of lead (II) ions in aqueous solution; this production strategy promotes the natural self-doping of biochar without requiring harsh conditions. The kinetics and thermodynamics of the adsorption process, as well as the effect of pH, ionic strength and dissolved organic matter on the adsorption efficiency were systematically assessed. The microalgae-derived biochar shows superior adsorption performances compared to a nutshell-derived one (used as a reference of lignocellulosic feedstocks) under all the tested conditions. The microalgae-derived biochar was finally used to decorate screen-printed carbon electrodes to improve the electroanalytical performances towards the voltammetric detection of lead (II) ions. A two-fold increase in sensitivity was obtained compared to the unmodified electrode thanks to the enhanced electron transfer and adsorption properties provided by biochar. These results highlight the potentialities of microalgae-derived biochar for environmental and sensing applications.publishedVersio

Exploring the Adsorption of Pb on Microalgae-Derived Biochar: A Versatile Material for Environmental Remediation and Electroanalytical Applications

Biochar, a carbon material obtained by pyrolysis of biomasses, is increasingly applied in environmental remediation and sensing thanks to its functional properties, cost-effectiveness and eco-friendliness. The adsorption capacity of biochar, strictly dependent on its specific surface area, heteroatom doping and surface functional groups, is crucial for these applications. Here, biochar produced at low temperature (350 °C) from a marine microalga (Nannochloropsis sp.) is proposed as an efficient adsorbent of lead (II) ions in aqueous solution; this production strategy promotes the natural self-doping of biochar without requiring harsh conditions. The kinetics and thermodynamics of the adsorption process, as well as the effect of pH, ionic strength and dissolved organic matter on the adsorption efficiency were systematically assessed. The microalgae-derived biochar shows superior adsorption performances compared to a nutshell-derived one (used as a reference of lignocellulosic feedstocks) under all the tested conditions. The microalgae-derived biochar was finally used to decorate screen-printed carbon electrodes to improve the electroanalytical performances towards the voltammetric detection of lead (II) ions. A two-fold increase in sensitivity was obtained compared to the unmodified electrode thanks to the enhanced electron transfer and adsorption properties provided by biochar. These results highlight the potentialities of microalgae-derived biochar for environmental and sensing applications