Exploring the relationship between anthropomorphism and theory-of-mind in brain and behaviour

The process of understanding the minds of other people, such as their emotions and intentions, is mimicked when individuals try to understand an artificial mind. The assumption is that anthropomorphism, attributing human-like characteristics to non-human agents and objects, is an analogue to theory-of-mind, the ability to infer mental states of other people. Here, we test to what extent these two constructs formally overlap. Specifically, using a multi-method approach, we test if and how anthropomorphism is related to theory-of-mind using brain (Experiment 1) and behavioural (Experiment 2) measures. In a first exploratory experiment, we examine the relationship between dispositional anthropomorphism and activity within the theory-of-mind brain network (n = 108). Results from a Bayesian regression analysis showed no consistent relationship between dispositional anthropomorphism and activity in regions of the theory-of-mind network. In a follow-up, pre-registered experiment, we explored the relationship between theory-of-mind and situational and dispositional anthropomorphism in more depth. Participants (n = 311) watched a short movie while simultaneously completing situational anthropomorphism and theory-of-mind ratings, as well as measures of dispositional anthropomorphism and general theory-of-mind. Only situational anthropomorphism predicted the ability to understand and predict the behaviour of the film's characters. No relationship between situational or dispositional anthropomorphism and general theory-of-mind was observed. Together, these results suggest that while the constructs of anthropomorphism and theory-of-mind might overlap in certain situations, they remain separate and possibly unrelated at the personality level. These findings point to a possible dissociation between brain and behavioural measures when considering the relationship between theory-of-mind and anthropomorphism

Motivation through gamification: A Self-Determination Theory perspective for the design of an adaptive reward system

Research on the nature and origins of human motivation has addressed the role of rewards in learning and behaviour. Gamification finds its raison d'être in being able to leverage motivational theories, to foster motivation in users through the use of game elements. One of the main criticisms moved to the use of gamification for learning purposes is related to the one-size-fits-all approach that tends to characterize many gamified applications. In this paper we explore the possibilities that can arise from the convergence of Self-Determination Theory principles and machine learning, to improve the efficacy of gamification reward systems

Relationship between odor intensity estimates and COVID-19 prevalence prediction in a Swedish population

International audienceIn response to the coronavirus disease 2019 (COVID-19) pandemic, countries have implemented various strategies to reduce and slow the spread of the disease in the general population. For countries that have implemented restrictions on its population in a stepwise manner, monitoring of COVID-19 prevalence is of importance to guide the decision on when to impose new, or when to abolish old, restrictions. We are here determining whether measures of odor intensity in a large sample can serve as one such measure. Online measures of how intense common household odors are perceived and symptoms of COVID-19 were collected from 2440 Swedes. Average odor intensity ratings were then compared to predicted COVID-19 population prevalence over time i

An olfactory self-test effectively screens for COVID-19

International audienceAbstract Background Key to curtailing the COVID-19 pandemic are wide-scale screening strategies. An ideal screen is one that would not rely on transporting, distributing, and collecting physical specimens. Given the olfactory impairment associated with COVID-19, we developed a perceptual measure of olfaction that relies on smelling household odorants and rating them online. Methods Each participant was instructed to select 5 household items, and rate their perceived odor pleasantness and intensity using an online visual analogue scale. We used this data to assign an olfactory perceptual fingerprint, a value that reflects the perceived difference between odorants. We tested the performance of this real-time tool in a total of 13,484 participants (462 COVID-19 positive) from 134 countries who provided 178,820 perceptual ratings of 60 different household odorants. Results We observe that olfactory ratings are indicative of COVID-19 status in a country, significantly correlating with national infection rates over time. More importantly, we observe indicative power at the individual level (79% sensitivity and 87% specificity). Critically, this olfactory screen remains effective in participants with COVID-19 but without symptoms, and in participants with symptoms but without COVID-19. Conclusions The current odorant-based olfactory screen adds a component to online symptom-checkers, to potentially provide an added first line of defense that can help fight disease progression at the population level. The data derived from this tool may allow better understanding of the link between COVID-19 and olfaction

Erratum: More Than Smell-COVID-19 Is Associated with Severe Impairment of Smell, Taste, and Chemesthesis (Chemical Senses (2020) DOI: 10.1093/chemse/bjaa041)

This is a correction notice for article bjaa041 (DOI: https:// doi.org/10.1093/chemse/bjaa041), published 20 June 2020. An incorrect version of the caption to Figure 5 was mistakenly included in the published paper. An updated version is given below. Neither the data nor the paper's conclusions were affected by this correction. The authors sincerely apologize for the error. (A) Correlations between the 3 principal components with respect to changes in 3 chemosensory modalities (i.e., taste, smell, and chemesthesis). Shades of gray indicate positive correlation, whereas shades of red indicate negative correlations. White denotes no correlation. (B) Clusters of participants identified by k-means clustering. The scatterplot shows each participant's loading on dimension 1 (degree of smell and taste loss, PC1 on x-Axis) and dimension 2 (degree of chemesthesis loss, PC2 on y-Axis). Based on the centroid of each cluster, participants in cluster 1 (blue, N = 1767; top left) are generally characterized by significant smell, taste and chemesthesis loss. Participants in cluster 2 (orange, N = 1724; bottom center) are generally characterized by ratings that reflect smell/taste loss with preserved chemesthesis. Loadings for participants in cluster 3 (green, N = 548; right side) are generally characterized by reduced smell and taste loss, and preserved chemesthesis

Recent smell loss is the best predictor of COVID-19 among individuals with recent respiratory symptoms

In a preregistered, cross-sectional study, we investigated whether olfactory loss is a reliable predictor of COVID-19 using a crowdsourced questionnaire in 23 languages to assess symptoms in individuals self-reporting recent respiratory illness. We quantified changes in chemosensory abilities during the course of the respiratory illness using 0–100 visual analog scales (VAS) for participants reporting a positive (C19+; n = 4148) or negative (C19−; n = 546) COVID-19 laboratory test outcome. Logistic regression models identified univariate and multivariate predictors of COVID-19 status and post-COVID-19 olfactory recovery. Both C19+ and C19− groups exhibited smell loss, but it was significantly larger in C19+ participants (mean ± SD, C19+: −82.5 ± 27.2 points; C19−: −59.8 ± 37.7). Smell loss during illness was the best predictor of COVID-19 in both univariate and multivariate models (ROC AUC = 0.72). Additional variables provide negligible model improvement. VAS ratings of smell loss were more predictive than binary chemosensory yes/no-questions or other cardinal symptoms (e.g., fever). Olfactory recovery within 40 days of respiratory symptom onset was reported for ~50% of participants and was best predicted by time since respiratory symptom onset. We find that quantified smell loss is the best predictor of COVID-19 amongst those with symptoms of respiratory illness. To aid clinicians and contact tracers in identifying individuals with a high likelihood of having COVID-19, we propose a novel 0–10 scale to screen for recent olfactory loss, the ODoR-19. We find that numeric ratings ≤2 indicate high odds of symptomatic COVID-19 (4 < OR < 10). Once independently validated, this tool could be deployed when viral lab tests are impractical or unavailable

Relatie- en gezinsproblematiek, zorgmijding en preventie tijdens en na COVID-19.

De Coronacrisis heeft het dagelijks leven van paren en gezinnen in Nederland ingrijpend veranderd. Tijdens lock-downs zitten ongeveer twee-en-een-half miljoen Nederlandse gezinnen thuis waar werk, school en privéleven op dezelfde locatie moeten worden gecombineerd. In combinatie met toekomstonzekerheid, werkdruk en mogelijk ziekte of financiële zorgen, kan de stress thuis behoorlijk toenemen. Wat is de impact van de Coronacrisis op Nederlandse relaties en gezinnen? Samen met professionele organisaties voor relatie- en gezinstherapie (NVRG en EFT Nederland) hebben we met behulp van online vragenlijsten onderzoek gedaan naar de ervaringen van een representatieve steekproef van samenwonende en getrouwde stellen (1002 respondenten) met en zonder thuiswonende kinderen na de eerste en tijdens de tweede golf in 2020. De resultaten laten grotendeels een beeld zien van veerkrachtige relaties en gezinnen tijdens de eerste en de tweede golf. De meerderheid rapporteert geen dan wel positieve veranderingen in relatie en gezin door de Coronacrisis. Men heeft meer tijd voor elkaar en deelt meer dingen met elkaar dan voor de crisis. Tegelijkertijd rapporteert zo’n 10% een negatieve impact en meer relatie- en gezinsproblematiek. Stress door factoren zoals werk, gezondheid, en de financiële situatie hangt consistent samen met een meer negatieve impact van de Coronacrisis, meer relatie- en gezinsproblematiek en meer verbaal partnergeweld. Dit is echter met name het geval wanneer stress gepaard gaat met weinig externe sociale steun en wanneer partners samen niet goed kunnen omgaan met stress. Aanbevolen wordt om meer aandacht te geven aan maatregelen die de sociale steun van mensen buiten het eigen huishouden versterkt en aan het verbeteren van stress-regulatie van stellen en ouders. Het gebruik van, en de behoefte aan, hulpverlening voor relatie- en gezinsproblematiek was in deze steekproef beperkt. Ook was de geschatte effectiviteit van met name online hulpverlening lager dan wat bekend is uit wetensschappelijk effectiviteitsonderzoek. Een publiekscampagne en/of informatievoorziening over de werking van therapie verdient aanbeveling. Daarnaast zijn de wachttijden voor professionele hulp een aandachtspunt en zou kostenvergoeding professionele hulp bij relatie-en gezinsproblemen beter bereikbaar maken volgende de deelnemers

Funny and meaningful: Media messages that are humorous and moving provide optimal consolation in corona times

During the first months of the corona crisis, people worldwide produced and shared thousands of uplifting (e.g., humorous, moving) media messages. The six studies reported here empirically tested the consolatory effects of viewing such positive media messages in the US, The Netherlands, and the UK. I compared the impact of humorous and moving (i.e., touching, heartwarming) messages, as they provide different kinds of well-being: hedonic versus eudaimonic. Studies 1-3 had correlational designs. Largely in line with the hedonic versus eudaimonic well-being framework, the results suggested that humorous messages lift people's spirits by providing pleasure, while moving messages lift people's spirits by providing realism, optimism, and by illustrating core human values. Studies 4-6 used a pre- and post-measure of negative and positive emotions. The results showed that viewing non-moving humorous messages significantly reduced negative emotions but did not increase positive emotions. Viewing non-humorous moving messages reduced negative emotions and increased positive emotions in the US and UK, but not in The Netherlands. Finally, viewing messages that are both humorous and moving reduced negative emotions and increased positive emotions in all samples, implying they are particularly valuable as mood-enhancers during crises. The practical and theoretical implications of these findings are discussed

The Legacy of Willem Beurs ‒ Bridging the Gap between Art and Material Perception

Dutch Golden Age painters could convincingly depict all sorts of materials. How did they do it and how do we perceive them as such, are questions that only recently have started to be addressed by art historians and vision scientists, respectively. This paper aims to discuss how a booklet of pictorial recipes written by the Dutch painter Willem Beurs in 1692 constitutes an index of key image features for material depiction and perception. Beurs' recipes connect different materials according to their shared visual features, and offer the profiles, i.e., the optimal combinations, of these features to render a wide range of materials. By combining representation and perception, the knowledge of painters about the depiction of materials can help to understand the mechanisms of the visual system for material perception, and these in turn can explain the pictorial features that make the pictorial representation of materials so convincing