Sign in

Tom Hollenstein

@tomhollenstein.bsky.social
488 followers 303 following 53 posts

Applying Developmental Pscyh theory and research on adolescent emotion & regulation, parent-child interaction dynamics to more robust and informative understanding of youth digital experiences tomhollenstein.com

PostsRepliesMedia
Reposted by Tom Hollenstein
Michele Morningstar @profmorningstar.bsky.social · 15/09/2026
We have a newly minted PhD in the house! Please join me in congratulating Dr. @danielnault.bsky.social on his successful doctoral defence today! 🎓
151
Tom Hollenstein @tomhollenstein.bsky.social · 14/09/2026
from this graph, that conclusion is totally unfounded. 2023-2026? Did it go up? Down? No idea*. "We do not know yet" is a wonderfully rigorous statement. Stop putting conclusion before data. *note, this critique is not specific to this particular instance
130
Reposted by Tom Hollenstein
The Kingstonist @kingstonist.bsky.social · 21/08/2026
“We're excited to really build a series that capitalizes [on] and shares knowledge within the Kingston community broadly. So we have so many curious folks with lots of different experiences," said Dr. Karalyn McRae. Details on the series and first lecture here: www.kingstonist.com/news/queens-...
kingstonist.com
Queen's professors launch new free speaker series to encourage learning for all ages
(Kingston, Ontario) Curious Minds Kingston is a new free speaker series created by Queen's University professors who aim to provide family-friendly lectures on a plethora of topics — from space to wil...
052
Reposted by Tom Hollenstein
Andrea Howard @drandreahoward.bsky.social · 21/08/2026
Enjoyed talking to @psychscience.bsky.social about my group’s new(ish) paper for the Observer. I’ve talked about this on here at an earlier stage. In 4 studies, we found no evidence that asking young adults to cut back on their social media improves well-being. Small thread 🧵 follows:
psychologicalscience.org
For Young Adults, Limiting Social Media Use Doesn’t Improve Well-Being
What happens when young adults are asked to slash their social media use to 30 minutes a day? In a new set of studies, most did not follow through, and those who did cut back …
46625
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 15/08/2026
Mike Males reminds us to look adult mental health and abuse within homes versus headlines if we want to really understand depression among girls. He also reminded me of the time I was called crazy for letting my child use social media. That was interesting... mikemales.substack.com/p/gee-our-to...
mikemales.substack.com
Gee. Our top authorities just can’t figure out why teenagers got more depressed during the 2010s. “It must be social media!”
“Elephant? I don’t see no elephant!” An update on political and “experts’” rampant obtusity on “teenage mental health.”
093
Reposted by Tom Hollenstein
rahaeli @rahaeli.bsky.social · 26/03/2026
If you only read one of them (and you should read all of them before you post about the issue), make it this one. www.jmir.org/2024/1/e59585
jmir.org
Ten Myths About the Effect of Social Media Use on Well-Being
This viewpoint reviews the empirical evidence regarding the association between social media use and well-being, including life satisfaction and affective well-being, and the association between socia...
222266
Tom Hollenstein @tomhollenstein.bsky.social · 27/07/2026
One of the most important (often ignored, always misinterpreted) papers: pubmed.ncbi.nlm.nih.gov/27929304/ With < full lifetime data, only 17% never had clinician confirmed Dx, so that number has to get closer to 0 for full lifespan. Everyone's "disordered"? What's "normal"? What's mental health?
pubmed.ncbi.nlm.nih.gov
Enduring mental health: Prevalence and prediction - PubMed
We review epidemiological evidence indicating that most people will develop a diagnosable mental disorder, suggesting that only a minority experience enduring mental health. This minority has received...
050
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 21/07/2026
A few thoughts on why I changed my mind about age-gating as a way to protect young people online, as France races forward with their plans to ban under 15s from social media open.substack.com/pub/candiceo...
open.substack.com
Why I Changed My Mind About Age-Gating and Social Media Bans
Last week I spoke with Amelia Gentleman at The Guardian about the growing movement to ban young people under the age of 16 from social media platforms.
1128
Reposted by Tom Hollenstein
Isabela @isabelagranic.bsky.social · 17/07/2026
Gen Z is Crossing the Threshold into Adulthood and We Need to Show Up for Them substack.com/@isabelagran...
substack.com
Gen Z is Crossing the Threshold into Adulthood and We Need to Show Up for Them
On “failure to launch,” the developmental passage into adulthood, and what actually helps
021
Reposted by Tom Hollenstein
The Kingstonist @kingstonist.bsky.social · 17/07/2026
#ICYMI "Emotions are not weaknesses. They can... help us recognize when we feel secure, connected, and at peace, or when something in our lives needs to change," writes Resolve's Director of Community Services Tara Everitt in our latest op/ed. Read more here: www.kingstonist.com/mental-healt...
kingstonist.com
Opinion: Creating emotional safety – Kingston News
(Kingston, Ontario) From an early age, many of us learn that expressing emotions is not always safe.
033
Reposted by Tom Hollenstein
Timothy O'Leary @timothyoleary.bsky.social · 17/07/2026
I think the difficulty of understanding feedback loops underlies many big debates in science: Origin of life: "genes first" vs "metabolism first" (neither, it's a feedback loop) Development: "nature vs nurture" (neither, it's a feedback loop) Neuroscience: "brain vs behaviour" (you guessed it!)
43810
Reposted by Tom Hollenstein
Taylor Lorenz @taylorlorenz.bsky.social · 16/07/2026
“Social media is ‘one of the least influential factors’ in teen depression and anxiety; girls who are already depressed go on to use social media more, not the other way around.”
theguardian.com
‘Social media bans are likely to make things worse’: psychologist Candice Odgers on kids, tech and mental health
She has studied adolescent mental health for 25 years and fears the debate obscures some of the biggest issues facing teenagers – from the impact of Covid to the health of their adult caregivers
914850
Tom Hollenstein @tomhollenstein.bsky.social · 07/07/2026
This looks awesome, @aidangcw.bsky.social ! So important. Agree it is deeper than just method. Ontological process. Can't wait to read it! thank you
021
Tom Hollenstein @tomhollenstein.bsky.social · 04/07/2026
Candice Odgers is the reasoned, evidence-based, and child-centric voice that EVERYONE needs to listen to. If you are TRULY concerned about youth, so many more effective things can be done to improve their lives. Banning phones is SUPREMELY stupid, and harmful. Thank you, Candice.
060
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 23/06/2026
Watch the entire talk here: go.ted.com/candiceodgers
go.ted.com
What we're getting wrong about teens and tech
For years, the warning has been: smartphones are destroying a generation. But developmental psychologist Candice Odgers says that decades of data on teens tells a different story — violence, alcohol u...
083
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 23/06/2026
The more often you hear something, the more likely you are to believe that it is true. But please, don't believe everything you hear about teens today. Science and how well they are doing, despite the suffering of adults around them, tells a different story.
22112
Reposted by Tom Hollenstein
Pessimists Archive @pessimistsarc.bsky.social · 15/06/2026
In 1908 the Lancet called for an 18+ age limit on reading in bed for U.K. children.
321164514
Reposted by Tom Hollenstein
Social Media Lab @socialmedialab.ca · 12/06/2026
"Banning children from social media is not the answer, UN warns – platforms must be made safe by design" news.un.org/en/story/202...
news.un.org
Banning children from social media is not the answer, UN warns – platforms must be made safe by design
Blocking children from social media is no substitute for making platforms safe in the first place, the UN human rights office warned Friday, as it issued a 10-point framework urging governments and te...
51710
Reposted by Tom Hollenstein
Andrea Howard @drandreahoward.bsky.social · 10/06/2026
Canada is getting ready to ban social media for kids under 16. The quote going around by cabinet minister Marc Miller: "it's obvious why it's a priority. Kids are dying." Every death by suicide is a tragedy but the numbers don't support this claim. I pulled Statistics Canada data to illustrate: 🧵
Graph showing deaths by suicide among 10-14 year olds and 15-19 year olds in Canada, annually from 2000 to 2024. Neither death rates nor actual countable deaths are increasing over time, and for the older group, the year 2024 was the lowest number of deaths by suicide this century.
1179
Reposted by Tom Hollenstein
paolo @paolopalma.bsky.social · 12/06/2026
There's a few things I want to say about this, but I'll stay in my research lane (and in theme with #Pride): The effects of social media on mental health is mixed. But we know that social media can be an avenue for 2SLGBTQ+ kids to find community and support where it otherwise does not exist.
2137
Reposted by Tom Hollenstein
Dr. Rachel Kowert @drkowert.bsky.social · 23/04/2026
A brilliant rebuttal to that NYT opinion piece from earlier in the week (Yes, THAT one) "We don’t need fewer games – we need better ones, and a deeper commitment to designing learning experiences that invite students to not simply respond, but to think" www.gamesforchange.org/blog_posts/t...
gamesforchange.org
The Problem Isn’t Screens. It’s That We’ve Turned Learning Into a Game No One Wants to Play - Games for Change
162
Reposted by Tom Hollenstein
Andrea Howard @drandreahoward.bsky.social · 17/04/2026
Really great #SRA2026 roundtable session this morning by @mitchprinstein.bsky.social , @evatelzer.bsky.social , Brinleigh Murphy-Reuter and Sunny Liu all about advancing responsible social media research. Heartening to hear so many thoughtful perspectives, and no moral panic about teens and screens!
171
Reposted by Tom Hollenstein
DSEC Lab @dseclab.bsky.social · 12/03/2026
The DSEC Lab is in Pittsburgh for #SAS2026! 🎉 We’re excited to present some of the latest findings from the lab and to learn from the incredible work being shared by others at the conference! Our team will be presenting on Friday and Saturday, so stay tuned for some conference highlights!
022
Reposted by Tom Hollenstein
The Kingstonist @kingstonist.bsky.social · 09/03/2026
#ICYMI As we get closer to March Break, our friends at The Screening Room are making some family-friendly and wallet-friendly plans! Read more: www.kingstonist.com/news/the-scr...
kingstonist.com
The Screening Room's annual March Break Movies series to screen family-friendly classics for $6 – Kingston News
(Kingston, Ontario) Downtown Kingston's beloved cinema, The Screening Room, is gearing up for its fourth annual March Break Movies series, showing seven family-friendly classics for only $6 per ticket...
042
Reposted by Tom Hollenstein
Chris Ferguson @cjferguson1111.bsky.social · 14/02/2026
In my essay today for @spectator I argue that #socialmedia bans such as in place in Australia, and being considered in the UK are doomed to fail. The evidence just isn't there that they would help. spectator.com/article/ther...
spectator.com
There is no evidence that social media harms children’s mental health
Far from ‘drowning in evidence’, real researchers – not pop psychologists – are scouring a great desert looking for puddles
042
Tom Hollenstein @tomhollenstein.bsky.social · 30/01/2026
Great use of state space grids!
100
Reposted by Tom Hollenstein
Colby Vorland @colbyvorland.bsky.social · 10/01/2026
Lazy Scholar is available on Chrome: chromewebstore.google.com/detail/lazy-... and Firefox: addons.mozilla.org/en-US/firefo...
082
Tom Hollenstein @tomhollenstein.bsky.social · 06/01/2026
Agreed, Andrea. That direction is never considered by the pre-convinced crowd. aaannnndd....PANAS is not a wellbeing measure. Feeling negative emotions is NORMAL. Please please please MAKE THE SCHLOCK STOP!
150
Reposted by Tom Hollenstein
Michele Morningstar @profmorningstar.bsky.social · 18/12/2025
@affectscience.bsky.social notices are out! 🎉 If you’re going to #SAS2026, consider attending its very first Developmental Affective Science pre-conference too! @eriknook.bsky.social and I hope to see you there. 🤞🏻 Spread the word!
085
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 17/12/2025
If only adults could pay attention to something other than teenagers’ phones…
0115
Reposted by Tom Hollenstein
Mark Sabbagh @marksabbagh.bsky.social · 08/12/2025
Our department is hiring! We’re looking for a new colleague (Assoc/Full) in Social/Affective Neuroscience to join us at Queen’s starting July 2026. Amazing people, great facilities, supportive community. Please share!! Full ad here: www.queensu.ca/psychology/n...
queensu.ca
Employment Opportunities | Department of Psychology
Available Positions Position Title Position Details Posting Date Closing Date Queen's University National Scholar (QNS) Senior Faculty Position in Social and/or Affective Neuroscience, Department of P...
045
Tom Hollenstein @tomhollenstein.bsky.social · 07/12/2025
I JUST posted about another one. A meta-analysis. Zero reality. On the plus side, great teaching tools. bsky.app/profile/tomh...
scientiapsychiatrica.com
The Impact of Social Media on Adolescent Mental Health: A Meta-Analysis | Scientia Psychiatrica
Introduction: The proliferation of social media has raised significant concerns about its potential effects on the mental health of adolescents. This meta-analysis aims to provide a comprehensive asse...
260
Tom Hollenstein @tomhollenstein.bsky.social · 07/12/2025
So...my undergrad thesis student is doing a quality analysis of studies found in meta-analyses. She identified a few and we contacted the authors to request their effect sizes and other variables for the studies in their papers. Here's what happened: scientiapsychiatrica.com/index.php/Sc...
scientiapsychiatrica.com
The Impact of Social Media on Adolescent Mental Health: A Meta-Analysis | Scientia Psychiatrica
Introduction: The proliferation of social media has raised significant concerns about its potential effects on the mental health of adolescents. This meta-analysis aims to provide a comprehensive asse...
514675
Reposted by Tom Hollenstein
Andrew Heiss @andrew.heiss.phd · 19/08/2025
Updating my comparative public admin seminar class—which was decimated by AI last year—to maybe be a little more LLM-proof by adding a 20–30 minute start-of-class writing & discussion activity. Will it work? Who knows! Full details and PDF here: governancef25.classes.andrewheiss.com/assignment/c...
Worksheet called "Check-in and warm-up" with these questions:

1. Name and date
2. Check in asking about attendance and preparation with readings
3. Write 1–2 paragraphs about (1) what you most want to talk about from the readings today, and (2) why.
4. Write 1–2 paragraphs connecting this week’s topic and readings to a recent or current event.
1417514
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 25/08/2025
Not surprisingly I have lots of thoughts on this. But in a nutshell, Yes, we should support teachers and no students should not be on their phones in class (unless they are integrated into the class plan or supporting learning), but, most teachers and schools had already solved this problem...
1417
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 25/08/2025
with phones in backpacks, lockers, or in holders at the back of the room. So the bans are doing little to change access to phones, are costing us lot of money (with these bizarre yonder pouches), time, and resources and are not solving any of the real problems that young people are facing - so...
1373
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 25/08/2025
the danger is that adults claim victory and believe they have saved the children, when in reality they have just kicked down an already open door and did nothing to support youth mental health (oh, and by the way, we are in the midst of an adult mental health crisis but keep pointing only at youth)
1524
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 25/08/2025
mikemales.substack.com/p/new-figure...
mikemales.substack.com
New figures quantify teenagers’ self harm. Once again, we’re hearing social media is to blame.
See if you can spot another reason why teens might be more depressed.
3348
Reposted by Tom Hollenstein
Isabela @isabelagranic.bsky.social · 25/08/2025
More details on [the program here](liminal-learning.com/program). Liminal Learning is a nonprofit, aiming to provide 30% of its places on scholarship over its lifetime.
liminal-learning.com
Liminal Learning
Liminal Learning offers a comprehensive “world-readiness” program that prepares young people (ages ~18–24 years) to thrive. Young people need strong friendships, a sense of agency, and trusted mentors...
011
Reposted by Tom Hollenstein
Isabela @isabelagranic.bsky.social · 25/08/2025
The yearlong program helps young people find their way in work, study, and life. We start with a weeklong retreat in the wilderness (Quest), and continues with online and offline programming. Check out some of the testimonials from our last cohort: liminallearning.substack.com
liminallearning.substack.com
The Liminal Post | Liminal Learning | Substack
News and community updates from Liminal Learning — a collective launch into purposeful adulthood. Click to read The Liminal Post, a Substack publication with hundreds of subscribers.
111
Reposted by Tom Hollenstein
Isabela @isabelagranic.bsky.social · 25/08/2025
We've got 5 scholarship places open for Liminal Learning's next cohort, starting October 19: liminal-learning.com/upcoming-que...!
liminal-learning.com
Liminal Learning — Quests
A communal launch into purpose-driven adulthood. Immersive communal experiences built on evolutionary principles of play and experimentation.
131
Reposted by Tom Hollenstein
Vera Vine @veravine.bsky.social · 15/08/2025
‼️Academic job alert‼️ Our dept at Queen's University (Canada!) is looking to hire a TT assistant prof in clinical psychology... Applications due end of Sept! Re-posts very much appreciated www.queensu.ca/psychology/n...
queensu.ca
Employment Opportunities | Department of Psychology
Available Positions Position Title Position Details Posting Date Closing Date Assistant Professor - Tenure-Track Appointment in Psychology
04339
Reposted by Tom Hollenstein
Daniel Ansari 🇨🇦 @numcog.bsky.social · 08/07/2025
Graduate students who have an offer to study in the US but are reconsidering or have been denied entry or current grad students who want to leave, then consider coming to Western University in Canada. Our University just launched a US-CAN Doctoral Excellence Program : grad.uwo.ca/finances/wes...
grad.uwo.ca
US-CAN Doctoral Excellence Award
Western University, in vibrant London, Ontario, delivers an academic and student experience second to none.
05536
Reposted by Tom Hollenstein
Julia M. Rohrer @dingdingpeng.the100.ci · 07/07/2025
It's a distinction from @kph3k.bsky.social's Genetic Lottery. I used it before even without talking about genetics; it catches a lot of the misconceptions that student have about what it means to call something a cause. Those misconceptions also led to a blog post: www.the100.ci/2024/06/26/s...
Thick and Thin Causation In the course of ordinary social science and medicine, we are quite comfortable calling something a cause, even when (a) we don’t understand the mechanisms by which the cause exerts its effects, (b) the cause is probabilistically but not deterministically associated with effects, and (c) the cause is of uncertain portability across time and space. “All” that is required to assert that you have identified a cause is to demonstrate evidence that the average outcome for a group of people would have been different if they had experienced X instead of Not-X. And the most convincing evidence that you know what might have been is to assign people randomly to X or Not-X. (The word “all” is in scare quotes here, because as any scientist of human behavior and society knows, actually isolating the variable of interest from the web of potential confounds, so that one can make an inference about causation, turns out to be an incredibly difficult and delicate operation.) I’m going to call this a “thin” model of causation.22 We can contrast the “thin” model of causation with the type of “thick” causation we see in monogenic genetic disorders or chromosomal abnormalities. Take Down’s syndrome, for instance. Down’s syndrome is defined by a single, deterministic, portable cause. To have three copies of chromosome 21, instead of two, is the necessary, sufficient, and sole cause of Down’s syndrome. The causal relationship between having three copies of chromosome 21 and Down’s is one-to-one, with the result that forward and reverse inferences work equally well. The cause of Down’s is chromosome 21 trisomy; the effect of chromosome 21 trisomy is Down’s. Having three copies of chromosome 21 doesn’t raise your probability of having Down’s; it is deterministic of the condition. And this causal relationship operates as a “law of nature,” in the sense that we expect the trisomy-Down’s relationship to operate more or less in the same way, regardless of the social mili…
2173
Reposted by Tom Hollenstein
Candice Odgers @candiceodgers.bsky.social · 20/06/2025
…yes, AND we have also known that young people with mental health problems often report spending more time gaming and online. Instead of calling them addicted because of it, we should ask what they are searching for and what we can do to help them find what they need.
13910
Reposted by Tom Hollenstein
The Kingstonist @kingstonist.bsky.social · 19/06/2025
#ICYMI The non-profit organization Liminal Learning is an educational response to the challenges faced by young people as they navigate towards adulthood, according to Kevin Bowers, co-founder and teacher at LCVI. #YouthSupport #YGK Learn more: www.kingstonist.com/news/liminal...
kingstonist.com
Liminal Learning aims to help young people 'thrive in a world of flux' – Kingston News
(Kingston, Ontario) A new venture, based partly in Kingston, is aiming to support young adults in their journey toward independence, or “purposeful adulthood."
043
Reposted by Tom Hollenstein
Isabela @isabelagranic.bsky.social · 09/06/2025
Thrilled to share how Liminal Learning is helping young people launch into adulthood. Here, I explain the rationale of our hybrid (offline/online) learning model. www.youtube.com/watch?v=47nS... If you're interested in joining us on a Quest, get in touch here: liminal-learning.com/upcoming-que...
122
Tom Hollenstein @tomhollenstein.bsky.social · 09/06/2025
Visionary, timely, effective, AND based on well-known developmental principles! Youth need something else beside multiple choice and status quo if they are going to thrive and work collectively on solutions we/they desparately need over the next generation. Highly recommend. 5 stars
032
Reposted by Tom Hollenstein
Isabela @isabelagranic.bsky.social · 09/06/2025
HELLO! Here's what I've been up to for the last 2 years! If you're 18-24 years old, come join us for a Quest! Liminal Learning is preparing young people to thrive in a world in flux, together. We are focused on collective flourishing and it shows 🥰. Come see what's on offer: liminal-learning.com
liminal-learning.com
Liminal Learning — Home
A communal launch into purpose-driven adulthood. Immersive communal experiences built on evolutionary principles of play and experimentation.
032