An Immaculate Deception: Persistently Elevated Serum ß-Hcg in Metastatic Signet Ring Cell Gastric Adenocarcinoma.

BACKGROUND: Persistent elevations in beta-human chorionic gonadotropin (ß-hCG) can be an ominous sign of both trophoblastic and non-trophoblastic malignancies. The absence of a clearly identified etiology of ß-hCG elevation warrants pursuit of further diagnostic testing to determine the source of ectopic ß-hCG. CASE REPORT: A virginal 26-year-old woman with past medical history significant for persistently elevated ß-hCG presented to our Emergency Department with shortness of breath, pleuritic chest pain, nausea, and vomiting, and was found to have widely metastatic gastric signet ring cell adenocarcinoma. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Although elevated serum ß-hCG is a generally a marker of pregnancy, ß-hCG elevation without clear etiology necessitates ruling out other insidious processes. Failure to maintain and pursue a broad differential in the context of unexplained elevations of ß-hCG can result in catastrophic missed or delayed diagnosis.

Debriefing works: Successful retraction of misinformation following a fake news study.

In recent years there has been an explosion of research on misinformation, often involving experiments where participants are presented with fake news stories and subsequently debriefed. In order to avoid potential harm to participants or society, it is imperative that we establish whether debriefing procedures remove any lasting influence of misinformation. In the current study, we followed up with 1547 participants one week after they had been exposed to fake news stories about COVID-19 and then provided with a detailed debriefing. False memories and beliefs for previously-seen fake stories declined from the original study, suggesting that the debrief was effective. Moreover, the debriefing resulted in reduced false memories and beliefs for novel fake stories, suggesting a broader impact on participants' willingness to accept misinformation. Small effects of misinformation on planned health behaviours observed in the original study were also eliminated at follow-up. Our findings suggest that when a careful and thorough debriefing procedure is followed, researchers can safely and ethically conduct misinformation research on sensitive topics.

Recalling fake news during real news corrections can impair or enhance memory updating: the role of recollection-based retrieval.

Fake news can impair memory leading to societal controversies such as COVID-19 vaccine efficacy. The pernicious influence of fake news is clear when ineffective corrections leave memories outdated. A key theoretical issue is whether people should recall fake news while reading corrections with contradictory details. The familiarity backfire view proposes that recalling fake news increases its familiarity, leading to interference. However, the integrative encoding view proposes that recalling fake news promotes co-activation and binding of contradictory details, leading to facilitation. Two experiments examined if one theory better accounts for memory updating after participants recalled actual fake news details when reading headlines that corrected misinformation. In Phase 1, participants read real and fake news headlines of unclear veracity taken from various internet sources. In Phase 2, participants read real news headlines that reaffirmed real news and corrected fake news from Phase 1. When they detected that Phase 2 real news corrected fake news, they attempted to recall Phase 1 fake news. In Phase 3, participants first recalled real news details. When they remembered that those details were corrections from Phase 2, they attempted to recall fake news from Phase 1. Recalling fake news when noticing corrections in Phase 2 led to better memory for real news in Phase 3 when fake news was recalled again and worse memory for real news in Phase 3 when fake news was not recalled again. Both views explain part of the memory differences associated with recalling fake news during corrections, but only when considering whether people recollected that fake news had been corrected.

The Instagram Infodemic Persists: Extreme Content Escapes Platform's Removal Tactics.

The general cobranding of conspiracy theories and COVID-19 misinformation has been shared at an alarming rate on social media platforms. Instagram has attempted an initiative to flag and/or remove health misinformation and/or disinformation; however, the efficacy of these efforts has been unclear. This study aimed to re-examine 300 posts collected in a previous study evaluating trends in misinformation removal process on Instagram. One hundred eighty-three of 300 original posts remained on the platform, most of which were from the hashtag #hoax. Only one post was flagged for containing false information, despite presence in more than one post. The claims that the platform is removing or flagging misinformation does not align with these findings and amplifies the concern for public safety for Instagram users. Sharing and removal patterns among the 300 posts suggest that conspiracy theorists or those exposed to the inaccurate information may be at higher risk of believing and propagating other unsupported theories.

The relationship between just world belief and wellbeing, cheating behaviors, and academic work behaviors during COVID 19 among university students.

Is the belief in a just world among students also stable under COVID-19? To answer this question, a study was conducted with university students from Germany (n = 291). The aim of the study was to analyze the predictive performance of the personal belief in a just world (PBJW) on students' life satisfaction and academic cheating and to take into account important mediators from the university context such as fellow student justice, lecturer justice, and procrastination. Derived from existing research, university students with a stronger PBJW should be more satisfied with their lives and cheat less than those with a weaker PBJW. The results support the hypothesized direct effects of PBJW on life satisfaction. Procrastination additionally mediated the effect of PBJW on life satisfaction. The level of PBJW predicted academic cheating only indirectly. The mediators procrastination and lecturer justice were crucial here. The results persisted when gender, learning, time to exam, socially desirable responding, general BJW, and self-efficacy were controlled. The findings were discussed in relation to the stressful situation caused by COVID-19. A reflection on the adaptive function of PBJW as a resource and relevant situation-specific mediators for university research and practice followed.

Fake news in the age of COVID-19: evolutional and psychobiological considerations.

The COVID-19 outbreak has been accompanied by a massive infodemic: an overabundance of information, some accurate and some not. At this pandemic we have seen a large scale of fake news and misinformation, leading to anti-vaccine, anti-mask, and anti-5G protests.1 Fake news is intentionally misleading and deceptive news that is written and published with the intent to damage an entity or a person. They may contain false, misleading, imposter, manipulated or fabricated content. Much of the discourse on fake news conflates three notions, named "information disorders": (a) Misinformation: false information someone shares without knowing it's untrue, (b) Disinformation: false information that's shared with the intention to harm or mislead, and (c) Malinformation: true information that's used to harm others.2 False beliefs generally arise through the same mechanisms that establish accurate beliefs. People appear to encode all new information as if it were true and later tag the information as being either true or false. Different cognitive, social and affective factors lead people to form or endorse misinformed views. The emotional content of the information shared also affects false-belief formation. An angry mood can boost misinformation sharing, while social exclusion, which is likely to induce a negative mood, can increase susceptibility to conspiratorial content.3 As shown by the Illusory Truth Effect, repeated exposure to an article, whether real or fake, increases people's perceptions of its accuracy. In social media, falsehood seems to diffuse significantly farther, faster, deeper, and more broadly than the truth in all categories of information, and the effects are more pronounced for false political news than for false news about terrorism, natural disasters, and science. Moreover, although prior knowledge of a statement leads people to confirm the statement the next time, they see it (confirmation bias), novelty facilitates decision making since it updates our understanding of the world.4 The fitness value of accurate information seems so obvious, while self-deception seems to threaten such hard-won informational gains. Then, why has not it selected out? The American evolutionary biologist and sociobiologist Robert Trivers5 suggested that although our senses have evolved to give us an exquisitely detailed perception of the outside world, as soon as that information hits our brains, it often becomes biased and distorted, usually without conscious effort. Why should this be so? For Trivers, the evolutionary origins of the human propensity for self-deception lie in the adaptive benefits of deceiving others. An animal becomes a better liar when it believes its own lies, or we deceive ourselves the better to deceive others. Deception in animals is the transmission of misinformation by one animal to another, and natural selection favors deceptive signaling when aggression either confers a great benefit to signalers or imposes a great cost to receivers.6 In humans, self-deception process may have a protective role against depression, while depression on its own may reduce mechanisms of self-deception.7, 8 Humans are biased information-seekers that prefer to receive information that confirms their values and worldviews. Maybe, this is why myths and conspiracy theories around COVID-19 and vaccines exist. We may suggest that underlined neuropsychological processes, probably based on biologically determined self- or other-deceptive mechanisms, may serve in the development, and even the conservation, of at least some of the social behaviors related to the fake news phenomenon. These mechanisms may support the human tendency for biased information-seeking, and even the evolutionary persistence of the fake news phenomenon.9 However, in cases such as of COVID-19 pandemic, the native urge to deceive ourselves and others is not without risk. Beliefs in COVID-19-related conspiracy narratives and fake news are negatively associated with vaccination willingness and infection-preventive behavior.1 The COVID-19 pandemic and associated infodemic have magnified the underlying problem of trust. The vaccine hesitancy is primarily a trust issue rather than an informational problem. Fake news, rumors and conspiracy theories about COVID-19 and vaccines should not be understood only as false beliefs, but also as indicators of popular anxieties and fears. Stress inoculation treatment can help people prepare for subsequent misinformation exposure and to increase misinformation detection.10 Finally, policymakers are advised to build information literacy skills for different levels and environments, and to move away from polarization attitudes and behaviors.

Health and science-related disinformation on COVID-19: A content analysis of hoaxes identified by fact-checkers in Spain.

A massive "infodemic" developed in parallel with the global COVID-19 pandemic and contributed to public misinformation at a time when access to quality information was crucial. This research aimed to analyze the science and health-related hoaxes that were spread during the pandemic with the objectives of (1) identifying the characteristics of the form and content of such false information, and the platforms used to spread them, and (2) formulating a typology that can be used to classify the different types of hoaxes according to their connection with scientific information. The study was conducted by analyzing the content of hoaxes which were debunked by the three main fact-checking organizations in Spain in the three months following WHO's announcement of the pandemic (N = 533). The results indicated that science and health content played a prominent role in shaping the spread of these hoaxes during the pandemic. The most common hoaxes on science and health involved information on scientific research or health management, used text, were based on deception, used real sources, were international in scope, and were spread through social networks. Based on the analysis, we proposed a system for classifying science and health-related hoaxes, and identified four types according to their connection to scientific knowledge: "hasty" science, decontextualized science, badly interpreted science, and falsehood without a scientific basis. The rampant propagation and widespread availability of disinformation point to the need to foster media and scientific caution and literacy among the public and increase awareness of the importance of timing and substantiation of scientific research. The results can be useful in improving media literacy to face disinformation, and the typology we formulate can help develop future systems for automated detection of health and science-related hoaxes.

It Is a Hoax: Attitude of South-eastern Nigerian Toward COVID-19 and Vaccine: The Need for Social Workers.

Different behavioral shifts have been observed among the country's population against the COVID-19 pandemic since its emergence in February 2020 in Nigeria. At first, people were scared of the pandemic and this was reinforced by their response to the National Center for Disease Control measures. As days go by and with the increasing number of confirmed cases of COVID-19 in Nigeria. To reduce the high burden of the pandemic, efforts were made by scientists to produce the COVID-19 vaccine, and Nigeria received about 4 million doses of COVID-19 vaccine in 2021. Thus, it becomes important to investigate the attitude of Nigerians toward COVID-19 and vaccination against COVID-19. To conduct this study, data were sourced using six focus group discussions involving 30 males and females, respectively. Findings revealed that Nigerians have lackadaisical attitude toward COVID-19 and COVID-19 vaccine owing to insincerity on the part of the government, poverty, belief system, low-level of awareness among others. To change the negative attitude of Nigerians toward COVID-19 and the vaccine, social worker interventions are recommended.

A Method for Cheating Indication in Unproctored On-Line Exams.

COVID-19 has disrupted every field of life and education is not immune to it. Student learning and examinations moved on-line on a few weeks notice, which has created a large workload for academics to grade the assessments and manually detect students' dishonesty. In this paper, we propose a method to automatically indicate cheating in unproctored on-line exams, when somebody else other than the legitimate student takes the exam. The method is based on the analysis of the student's on-line traces, which are logged by distance education systems. We work with customized IP geolocation and other data to derive the student's cheating risk score. We apply the method to approx. 3600 students in 22 courses, where the partial or final on-line exams were unproctored. The found cheating risk scores are presented along with examples of indicated cheatings. The method can be used to select students for knowledge re-validation, or to compare student cheating across courses, age groups, countries, and universities. We compared student cheating risk scores between four academic terms, including two terms of university closure due to COVID-19.

Cheating at the Top: Trait Dominance Explains Dishonesty More Consistently Than Social Power.

Power has long been associated with dishonesty. Here, we examined the contributions of personal and structural factors associated with power. Across five studies (N = 1,366), we tested the hypothesis that being dominant, more than having power and felt prestige, predicts dishonesty in incentivized tasks, moral disengagement, and breaking of Covid-19 containment rules. Dominance and dishonesty were positively associated (Study 1). Furthermore, dominance contributed to the positive relationship between occupational power and dishonesty in natural settings (Studies 2 and 5). Different types of power had inconsistent effects on dishonesty (Studies 3 and 4). Prestige was unrelated to dishonesty. Dominant individuals were overrepresented at the top, suggesting that the association between power and dishonesty may derive from self-selection processes, rather than power itself.

COVID-19 lessons learned: a global perspective.

One June 15, 2021, infectious disease authorities from around the world participated in a joint webinar to share experiences and lessons learned in combatting the COVID-19 pandemic. One of the overriding goals of the conference "COVID-19 Lessons Learned: A Global Perspective" was to provide documentation of worldwide COVID-19 response strategies, in order to combat the plethora of misinformation and conspiracy theories that are being actively disseminated. This misinformation is having a profound negative impact on controlling the pandemic in many countries. Misinformation which was addressed in the conference included challenging the seriousness of COVID-19 infections, a refusal to recognize aerosolization as the major mechanism of spread, a belief that schools can be opened safely without implementation of extensive control strategies, and that masks and vaccines are not effective. A second goal was the identification of common strategies between nations.  Common strategies included the implementation of a range of closures, mask mandates, travel bans and the need for expanded testing. But of utmost importance there was recognition of the need to implement a coordinated national strategy, which is depoliticized and led by scientists.

Abuse of social media duringCOVID-19 pandemic in Fiji.

The spread of misinformation, facilitated by social media and other digital platforms, has proven to be as destructive to global public health as the SARS-CoV-2 virus itself. Fake news adds challenges to human communication efforts, producing tension, misunderstanding, and disbelief. While social platforms such as Facebook, Twitter, Instagram, and Viber, etc. have provided a huge relief during the lockdown helping reduce mental stress and depression as well as facilitating online education, and work from home during the COVID-19 pandemic, it has also raised concerns over the spread of fake news. In such a situation, online fake news poses a new threat to public health communication as more people now depend on the internet to get health-related information. In response, this study seeks to understand how manipulation of news on social media has posed a threat to Fijian public health. Eventually, some of these have resulted in police investigations.

Machine learning based approach to exam cheating detection.

The COVID-19 pandemic has impelled the majority of schools and universities around the world to switch to remote teaching. One of the greatest challenges in online education is preserving the academic integrity of student assessments. The lack of direct supervision by instructors during final examinations poses a significant risk of academic misconduct. In this paper, we propose a new approach to detecting potential cases of cheating on the final exam using machine learning techniques. We treat the issue of identifying the potential cases of cheating as an outlier detection problem. We use students' continuous assessment results to identify abnormal scores on the final exam. However, unlike a standard outlier detection task in machine learning, the student assessment data requires us to consider its sequential nature. We address this issue by applying recurrent neural networks together with anomaly detection algorithms. Numerical experiments on a range of datasets show that the proposed method achieves a remarkably high level of accuracy in detecting cases of cheating on the exam. We believe that the proposed method would be an effective tool for academics and administrators interested in preserving the academic integrity of course assessments.