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Craig Sewall

@cjsewall9.bsky.social

Former academic, current clinical data scientist in industry. Occasionally has things to say about the whole social media panic. You can read those things here: https://open.substack.com/pub/craigsewall

208 Followers  |  101 Following  |  61 Posts  |  Joined: 19.12.2024  |  2.0787

Latest posts by cjsewall9.bsky.social on Bluesky

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kermit the frog in a video game with the words time to power up above him ALT: kermit the frog in a video game with the words time to power up above him
07.08.2025 19:41 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

bsky.app/profile/cjse...

07.08.2025 19:34 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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From Jeffrey Wooldridge over on Twitter, for those following along. Hereโ€™s the link heโ€™s talking about: papers.ssrn.com/sol3/papers....

07.08.2025 19:33 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 1

Thanks Stephen. Iโ€™ll check this out. In the bit of searching Iโ€™ve done thus far, Iโ€™ve noticed there is a decent amount of content on testing for pre-trends. But I havenโ€™t been able to find much on power for detecting treatment effects. Maybe Iโ€™m going at it wrong, though

07.08.2025 19:29 โ€” ๐Ÿ‘ 3    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Anyone aware of resources (blogs, articles, etc) that estimate/simulate power for DiD with staggered adoption estimators (e.g., Callaway and Sant'Anna)?

Bat signal @stephenjwild.bsky.social

07.08.2025 17:34 โ€” ๐Ÿ‘ 4    ๐Ÿ” 1    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 1
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Episode 7: Screen time myths and misconceptions Mythconceptions?

When it comes to screens, everyone seems to have an opinion - but how much of what we hear is actually true? Episode 7 of Screen Sense is out now, and we take on some of the most common myths and misconceptions around screen time:

screensensepodcast.substack.com/p/episode-7-...

25.07.2025 09:49 โ€” ๐Ÿ‘ 11    ๐Ÿ” 6    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Is it a hot take to say: If you have control variables in your analysis, you are doing causal inference, whether you realize it or not

09.07.2025 01:32 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Happy to share my new study, publ. in Social Science Research ๐ŸŽ‰ Bottom line: Yes, adolescents use their phones a lot ๐Ÿคณ But I find no support for the notion that this use displaces reading, homework, hobbies, physical act., sleep... Instead: Changing media preferences ๐Ÿ“บ ->๐Ÿ“ฑ. doi.org/10.1016/j.ss...

07.07.2025 10:12 โ€” ๐Ÿ‘ 45    ๐Ÿ” 16    ๐Ÿ’ฌ 4    ๐Ÿ“Œ 0
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Episode 4: Why do we find it so difficult to talk about tech effects? We often have a very real sense that digital technology can do damage to our wellbeing, and sometimes in ways that feel seriously worrying.

Episode 4 of Screen Sense is out now! This week, we explore why our public conversations about tech often get stuck in fear, and how we might move toward more helpful ways of thinking and talking about screens, wellbeing and family life:

screensensepodcast.substack.com/p/episode-4-...

05.07.2025 08:25 โ€” ๐Ÿ‘ 7    ๐Ÿ” 4    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Abstract:

Building on the idea that subjective evaluations of social media use (SMU) may shape well-being effects, this study investigated how two โ€œsocial media mindsetsโ€โ€”agency (perceived control over SMU) and valence (perceived effects of SMU)โ€”relate to self-reported and logged SMU, and four well-being indicators (depression, anxiety, stress, and life satisfaction) in a South African sample of young adults (Nโ€‰=โ€‰1,858; M ageโ€‰=โ€‰21.01). Agency mindsets were negatively correlated with SMU and positively with well-being, while valence mindsets were associated with higher SMU but not with well-being. Logged SMU showed weaker associations with mindsets and well-being than self-reported SMU, suggesting differences between perceived and actual behavior. The findings replicate, extend, and in some cases contradict prior research, emphasizing how usersโ€™ sense of control is more important for well-being than SMU duration or perceptions of its effects, and that more work is needed to understand whether the โ€œmindsetsโ€ concept is fruitful.

Lay summary:

This study investigated how young adultsโ€™ feelings about social mediaโ€”whether they feel in control of their use (agency) or view it positively (valence)โ€”relate to their actual use and mental well-being. The study involved 1,858 participants from South Africa using both self-reported and actual logged social media usage data. The results show that people who feel more in control of their social media use tend to use it less and report better mental well-being. In contrast, those who see social media as more positive spend more time on it, but this mindset did not directly relate to well-being. The data collected from logs of actual usage show weaker relations with well-being compared to peopleโ€™s estimates and to their mindsets. These findings suggest that a personโ€™s sense of control over social media plays a more important role in their mental health than how much time they spend on it.

Abstract: Building on the idea that subjective evaluations of social media use (SMU) may shape well-being effects, this study investigated how two โ€œsocial media mindsetsโ€โ€”agency (perceived control over SMU) and valence (perceived effects of SMU)โ€”relate to self-reported and logged SMU, and four well-being indicators (depression, anxiety, stress, and life satisfaction) in a South African sample of young adults (Nโ€‰=โ€‰1,858; M ageโ€‰=โ€‰21.01). Agency mindsets were negatively correlated with SMU and positively with well-being, while valence mindsets were associated with higher SMU but not with well-being. Logged SMU showed weaker associations with mindsets and well-being than self-reported SMU, suggesting differences between perceived and actual behavior. The findings replicate, extend, and in some cases contradict prior research, emphasizing how usersโ€™ sense of control is more important for well-being than SMU duration or perceptions of its effects, and that more work is needed to understand whether the โ€œmindsetsโ€ concept is fruitful. Lay summary: This study investigated how young adultsโ€™ feelings about social mediaโ€”whether they feel in control of their use (agency) or view it positively (valence)โ€”relate to their actual use and mental well-being. The study involved 1,858 participants from South Africa using both self-reported and actual logged social media usage data. The results show that people who feel more in control of their social media use tend to use it less and report better mental well-being. In contrast, those who see social media as more positive spend more time on it, but this mindset did not directly relate to well-being. The data collected from logs of actual usage show weaker relations with well-being compared to peopleโ€™s estimates and to their mindsets. These findings suggest that a personโ€™s sense of control over social media plays a more important role in their mental health than how much time they spend on it.

New in JCMC with @bronwynec.bsky.social: People who feel more in control of their social media use tend to use it less and report better well-being. Seeing social media as positive was associated with more use, but not well-being. ๐Ÿ‘‰ doi.org/10.1093/jcmc...

30.06.2025 07:34 โ€” ๐Ÿ‘ 24    ๐Ÿ” 6    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Hereโ€™s a screenshot of the โ€œaddictive useโ€ trajectories from the JAMA paper cited below. My educated guess from the details of the measure is that none of these lines comes close to bona fide โ€œaddictiveโ€ use

๐Ÿงต

20.06.2025 12:38 โ€” ๐Ÿ‘ 32    ๐Ÿ” 18    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 3
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Episode 1: Why does (digital) parenting feel so hard? Listen now | How should we think about parenting in a digital age?

Screen Sense: Parenting in a Digital World, the new podcast from @shuhbillskee.bsky.social and I - first episode is now live. We hope you enjoy it. open.substack.com/pub/screense...

13.06.2025 08:30 โ€” ๐Ÿ‘ 21    ๐Ÿ” 18    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 3

lol an app for a dishwasher. Whatโ€™s the world coming to?

09.06.2025 00:39 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Iโ€™m sick and tired of the tyranny of Big Ceramic

09.06.2025 00:02 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Microplastics!

08.06.2025 23:17 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I am convinced that weโ€™d experience the heat death of the universe before my plastic plates and cups dry out in the dishwasher

08.06.2025 22:38 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

Not sure if science has advanced this far yet to answer this question, but here goes: Why the hell do my plastic plates/cups NEVER dry out in the dishwasher?

08.06.2025 22:24 โ€” ๐Ÿ‘ 3    ๐Ÿ” 0    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

๐ŸŽ™๏ธScreen Sense - new podcast with me and @shuhbillskee.bsky.social, is launching next week! Two psychologists (and dads) talking honestly about what it means to raise a family in a screen-filled world - with science, real stories and zero guilt. Launching 13th June. screensensepodcast.substack.com

05.06.2025 18:22 โ€” ๐Ÿ‘ 31    ๐Ÿ” 14    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

Ditto

28.05.2025 20:49 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Hamaker is my hero

28.05.2025 20:45 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

I believe she removed her name from the paper when the consensus statements did not turn out the way she wanted. Hopefully Iโ€™m not โ€œspreading misinformationโ€ on that one

27.05.2025 18:43 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I assume this was the case for many others as well

27.05.2025 18:03 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I was invited to participate, as were many of the well known so-called โ€œskeptics,โ€ as far as Iโ€™m aware. But, like you said, seeing how Haidt/Twenge appeared to be part of the core team and all the claims being evaluated were drawn from Haidtโ€™s book, I decided to drop out b/c I assumed itโ€™d be biased

27.05.2025 18:03 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

Scientists like to blame poorly communicated results on science journalists.
This case shows the double standard:
1. When I exaggerate, it's a joke. When you do, it's 'misinformation'.
2. JvB's own tweets about the project didn't explain the methods, highlighted preliminary vibe check results.

26.05.2025 06:34 โ€” ๐Ÿ‘ 43    ๐Ÿ” 6    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

Youโ€™re claiming that was a joke? Come on, Jay

26.05.2025 01:56 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

โ€œa feature of good epistemology is that this kinda thing shouldnโ€™t happen.โ€ What does this mean? Can you provide examples of good epistemologies that are immune to this kind of thing happening to it?

24.05.2025 22:57 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Durham University philosopher of science Peter Vickers, who studies scientific consensus, agrees. The paper shows strong agreement on weak statements, which is an inevitable outcome of the method the authors used, he saysโ€”but the abstract makes bolder claims.

Much of the nuance, meanwhile, is buried in the nearly 200 pages of supplementary material, says Julia Rohrer, an expert on causal inference at the University of Leipzig. โ€œThe result here is not responsible science communication,โ€ Rohrer says.

โ€œIn retrospect, I think we should have been much more careful,โ€ Capraro says. He and his team will probably revise the paper to make the nuances clearer. โ€œBecause obviously if many people were misled, itโ€™s our fault, of course.โ€

Durham University philosopher of science Peter Vickers, who studies scientific consensus, agrees. The paper shows strong agreement on weak statements, which is an inevitable outcome of the method the authors used, he saysโ€”but the abstract makes bolder claims. Much of the nuance, meanwhile, is buried in the nearly 200 pages of supplementary material, says Julia Rohrer, an expert on causal inference at the University of Leipzig. โ€œThe result here is not responsible science communication,โ€ Rohrer says. โ€œIn retrospect, I think we should have been much more careful,โ€ Capraro says. He and his team will probably revise the paper to make the nuances clearer. โ€œBecause obviously if many people were misled, itโ€™s our fault, of course.โ€

New article by @cathleenogrady.bsky.social on the social media 'consensus' characterises the preprint as a failure of science communication โ€” because many got the impression the consensus was much stronger than it is.
www.science.org/content/arti...

22.05.2025 18:57 โ€” ๐Ÿ‘ 43    ๐Ÿ” 23    ๐Ÿ’ฌ 4    ๐Ÿ“Œ 4

As someone who is actually on this paper, this critique (and many others) is absolutely spot-on. I can't speak for other authors, but this process has left me with far more questions than answers. The gap between what the data say and how it's being framed publicly is...notable to say the least.

22.05.2025 20:15 โ€” ๐Ÿ‘ 20    ๐Ÿ” 7    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Social media consensus paper causes social media uproar Preprint reporting common ground among researchers on smartphones and teen mental health is premature and flawed, critics say

It's been a disappointing week. www.science.org/content/arti...

22.05.2025 21:33 โ€” ๐Ÿ‘ 5    ๐Ÿ” 2    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Is It Time to Abandon the Media Multitasking Index? | Journal of Media Psychology

Amidst all of this, @jacobtfisher.online & I have a new paper in @jmp-hogrefe.bsky.social! We discuss theoretical, methodological, & practical concerns with the media multitasking (MMT) index & lay out an agenda for better research on MMT

๐Ÿ“„ doi.org/10.1027/1864...
๐Ÿ“ OA osf.io/preprints/ps...

21.05.2025 15:44 โ€” ๐Ÿ‘ 16    ๐Ÿ” 8    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

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