Tl;dr: Negative bias is a type of cognitive bias where we tend to have a stronger response to negative stimuli and information than positive information of equal magnitude. We feel negative events more intensely and may dwell on them to our detriment. Negativity bias impacts how we consume the news, engage in relationships with other Read more…
No. In the US, we likely undercounted COVID deaths. A common refrain during the pandemic was that people were dying “with” rather than “of” COVID. The implication was that our official statistics were wrong and we were overstating the true danger of the pandemic. As we wrote about way back in 2020, data nerds like Read more…
Tl;dr: Ad hominem attacks are used to insult a person’s motive or character rather than address the content of a specific idea or argument. This type of mudslinging is an intellectual fallacy that draws attention away from the issue at hand and creates distrust of the individual. Let’s look at how ad hominem attacks can Read more…
It’s National News Literacy Week! This annual event highlights the importance of news literacy and provides tools for being more savvy consumers (and sharers!) of news and other information. See more info about the week’s events co-hosted by The News Literacy Project and E.W. Scripps Company (many of which are virtual and free) here. Those Read more…
A: Yes! Being strategic about your search terms can help you more effectively identify credible, fact-checked information and avoid just bringing up a bunch of websites promoting the rumor or false claim. TL; DR: MediaWise recommends keywords include specific names or places, target the specific topic or claim, and help focus the results on credible Read more…
Tl;dr: The Dunning-Kruger effect occurs when someone’s lack of knowledge or skill in a certain area causes them to overestimate their own ability. It also causes people who are the most competent to think less of their skill. Self-reflection, objective measures of performance, and getting meaningful feedback can help keep you from falling victim to Read more…
The Short Answer: Nope! 
The goal of a screening test is to determine the likelihood of disease in a person who currently shows no signs or symptoms, while a diagnostic test detects whether (and what type of) disease might be present in someone with symptoms. While some screening tests can be self-administered at home Read more…
Tl;dr: The framing effect is a cognitive bias in which our choices are more influenced by how information is presented than the information itself. We can overcome the framing effect by purposefully rephrasing information to reflect both positive and negative aspects of the choice, separating the information from the razzle dazzle, and gathering as much Read more…
Tl;dr: Availability bias, also called availability heuristic, is a type of cognitive bias that occurs when we rely disproportionately on the most readily available information to make decisions or judgments rather than the most representative or accurate data. Reflection and review of all available data can help us mitigate this particular bias. Sometimes do you Read more…
To help your child separate fact from fiction, teach them to: be skeptical, use credible sources, think critically, and embrace learning through science. Start early, and weave these lessons into everyday life. Back when we were young, we Nerdy Girls used encyclopedias, reference books, and textbooks to learn. These days, we are surrounded by a Read more…
No. Sadly, we are most likely still UNDER-counting Covid-19 deaths. Among the most persistent COVID-19 myths is the idea that COVID-19 deaths are being over-counted, which recently resurfaced in a Washington Post editorial. We’ve all heard stories of COVID positive motorcycle accident victims being counted or the saying that people are dying *with* COVID-19 rather Read more…
A: Follow five steps for vetting news sources from The News Literacy Project! TL:DR; Five steps include-web search the source, look for reporting standards, check for transparency, see how errors are handled, read a few news stories from that source. It can feel tricky to determine whether something you read online is from a legitimate Read more…
In many countries, life expectancy dropped substantially in 2020 due to COVID. Did life expectancy bounce back in 2021, or did things get even worse? TL;DR: A mixed bag, w/ greater divergence of experiences as the pandemic wore on. While Western Europe saw improvements from 2020, the US and Eastern Europe saw continued losses. Read Read more…
A: Not necessarily. Despite the name, life expectancy doesn’t predict the lifespan of individuals. But as a “snapshot” of mortality in the US, the news is not good. Recent U.S. CDC estimates show a loss of a 2.7 years of life expectancy in 2021 compared to 2019. Surprisingly, despite the vaccine roll-out, U.S. life expectancy Read more…
A: Confirmation bias happens when we accept information that confirms our pre-existing ideas or beliefs, but ignore or question information that does not. Motivated reasoning happens when we only seek out information that confirms what we already think is true. Both ways of distorted thinking can lead us to share information without critically assessing it Read more…
A: Different case definitions, study participants, data collection methods, and study timing across studies. TL:DR: Current estimates of the proportion of COVID-19 cases that develop long COVID range from 3-20% and have been as high as 50%! Considering how studies differ can help us understand why estimates vary so much across studies. Things to keep Read more…
Results of medical studies are often reported in the news. You may have seen headlines like “What vegetable on your dinner plate is killing you?” or “New study shows Medicine X causes memory loss!” You are, very likely and very appropriately, highly skeptical of these headlines but it can be really tricky to sort out Read more…
At Dear Pandemic, we want to dish out science facts AND equip our readers with tools to make sense of data and science themselves. This is post is part of an ongoing series by Dr. Kristen Panthagani of You Can Know Things, in which she dissects common logical fallacies that have led people astray during Read more…
A: Good question! Sensitivity and specificity are characteristics of a medical test that help us determine how useful that test is and how to interpret the result. BUT, they aren’t the be all and end all. We also want to know the positive and negative predictive value. Strap in for the ride and let’s talk Read more…
A: With more people using home rapid tests interpreting local COVID-19 data does become murkier, but a useful addition is wastewater surveillance! TL; DR Keeping an eye on local wastewater surveillance can help round out understanding of community transmission as it doesn’t rely on testing or reporting of test results. 
Home testing is great because Read more…
