Jakob Kasper
@jakobkas.bsky.social
PhD candidate @ippad_eu, @UvA_Amsterdam | Formerly MSc Psychology @Uniheidelberg | jakobkasper.com
Pinned
Jakob Kasper
@jakobkas.bsky.social
· Dec 1
OSF
doi.org
Excited to share a new preprint with @bnbakker.bsky.social, @ylelkes.bsky.social & @gijsschumacher.bsky.social!
doi.org/10.31234/osf...
Affective polarization research focuses almost exclusively on valence, despite affect having at least two core dimensions. We show that emotional arousal matters!
doi.org/10.31234/osf...
Affective polarization research focuses almost exclusively on valence, despite affect having at least two core dimensions. We show that emotional arousal matters!
Reposted by Jakob Kasper
So the US administration considers hate speech and disinformation “American viewpoints“? 🙄
HateAid is an organization that also helps climate scientists to defend themselves against online abuse and threats.
Its founder was awarded the Order of Merit of the Federal Republic of Germany 🇩🇪 this year.
HateAid is an organization that also helps climate scientists to defend themselves against online abuse and threats.
Its founder was awarded the Order of Merit of the Federal Republic of Germany 🇩🇪 this year.
“Imran Ahmed, chief executive of Centre for Countering Digital Hate; Josephine Ballon and Anna-Lena von Hodenberg, leaders of HateAid, a German organization; former EU Commissioner Thierry Breton, who was responsible for digital affairs; and Clare Melford, who runs the Global Disinformation Index.”
US bars five Europeans it says pressured tech firms to censor American viewpoints online
The State Department is barring five Europeans it accuses of leading efforts to pressure U.S. tech firms to censor or suppress American viewpoints.
apnews.com
December 24, 2025 at 6:59 AM
So the US administration considers hate speech and disinformation “American viewpoints“? 🙄
HateAid is an organization that also helps climate scientists to defend themselves against online abuse and threats.
Its founder was awarded the Order of Merit of the Federal Republic of Germany 🇩🇪 this year.
HateAid is an organization that also helps climate scientists to defend themselves against online abuse and threats.
Its founder was awarded the Order of Merit of the Federal Republic of Germany 🇩🇪 this year.
Reposted by Jakob Kasper
New publication with @turnbulldugarte.com in @psrm.bsky.social! 🧵
We study whether citizens’ liberal values are selective: do people support policies based on who promotes them?
Short answer: Yes, and it's driven by ethnic out-group disidentification. (1/11) 👇
doi.org/10.1017/psrm...
We study whether citizens’ liberal values are selective: do people support policies based on who promotes them?
Short answer: Yes, and it's driven by ethnic out-group disidentification. (1/11) 👇
doi.org/10.1017/psrm...
December 19, 2025 at 12:47 PM
New publication with @turnbulldugarte.com in @psrm.bsky.social! 🧵
We study whether citizens’ liberal values are selective: do people support policies based on who promotes them?
Short answer: Yes, and it's driven by ethnic out-group disidentification. (1/11) 👇
doi.org/10.1017/psrm...
We study whether citizens’ liberal values are selective: do people support policies based on who promotes them?
Short answer: Yes, and it's driven by ethnic out-group disidentification. (1/11) 👇
doi.org/10.1017/psrm...
Reposted by Jakob Kasper
🚨 Now out in Psych Science 🚨
We report an adversarial collaboration (with @donandrewmoore.bsky.social) testing whether overconfidence is genuinely a trait
The paper was led by Jabin Binnendyk & Sophia Li (who is fantastic and on the job market!) Free copy here: journals.sagepub.com/eprint/7JIYS...
We report an adversarial collaboration (with @donandrewmoore.bsky.social) testing whether overconfidence is genuinely a trait
The paper was led by Jabin Binnendyk & Sophia Li (who is fantastic and on the job market!) Free copy here: journals.sagepub.com/eprint/7JIYS...
December 17, 2025 at 5:17 PM
🚨 Now out in Psych Science 🚨
We report an adversarial collaboration (with @donandrewmoore.bsky.social) testing whether overconfidence is genuinely a trait
The paper was led by Jabin Binnendyk & Sophia Li (who is fantastic and on the job market!) Free copy here: journals.sagepub.com/eprint/7JIYS...
We report an adversarial collaboration (with @donandrewmoore.bsky.social) testing whether overconfidence is genuinely a trait
The paper was led by Jabin Binnendyk & Sophia Li (who is fantastic and on the job market!) Free copy here: journals.sagepub.com/eprint/7JIYS...
Reposted by Jakob Kasper
Partisanship has positive and negative contributions to representative democracies.
In POQ, Kasper & Bakker review Bankert's book, which explores how we can amplify the positive impacts while mitigating the negative ones.
Read now: doi.org/10.1093/poq/...
In POQ, Kasper & Bakker review Bankert's book, which explores how we can amplify the positive impacts while mitigating the negative ones.
Read now: doi.org/10.1093/poq/...
December 17, 2025 at 10:14 PM
Partisanship has positive and negative contributions to representative democracies.
In POQ, Kasper & Bakker review Bankert's book, which explores how we can amplify the positive impacts while mitigating the negative ones.
Read now: doi.org/10.1093/poq/...
In POQ, Kasper & Bakker review Bankert's book, which explores how we can amplify the positive impacts while mitigating the negative ones.
Read now: doi.org/10.1093/poq/...
Reposted by Jakob Kasper
Just published in Behavior Research Methods:
The individual-level precision of implicit measures
w/ @ianhussey.mmmdata.io
🧵👇
link.springer.com/article/10.3...
The individual-level precision of implicit measures
w/ @ianhussey.mmmdata.io
🧵👇
link.springer.com/article/10.3...
The individual-level precision of implicit measures - Behavior Research Methods
Implicit measures are used extensively in psychological science. One fundamental goal of these measures is to provide information diagnostic of an individual’s attitudes or beliefs. After 25 years of ...
link.springer.com
December 9, 2025 at 11:20 AM
Just published in Behavior Research Methods:
The individual-level precision of implicit measures
w/ @ianhussey.mmmdata.io
🧵👇
link.springer.com/article/10.3...
The individual-level precision of implicit measures
w/ @ianhussey.mmmdata.io
🧵👇
link.springer.com/article/10.3...
Reposted by Jakob Kasper
🚨 New in Nature+Science!🚨
AI chatbots can shift voter attitudes on candidates & policies, often by 10+pp
🔹Exps in US Canada Poland & UK
🔹More “facts”→more persuasion (not psych tricks)
🔹Increasing persuasiveness reduces "fact" accuracy
🔹Right-leaning bots=more inaccurate
AI chatbots can shift voter attitudes on candidates & policies, often by 10+pp
🔹Exps in US Canada Poland & UK
🔹More “facts”→more persuasion (not psych tricks)
🔹Increasing persuasiveness reduces "fact" accuracy
🔹Right-leaning bots=more inaccurate
December 4, 2025 at 8:43 PM
🚨 New in Nature+Science!🚨
AI chatbots can shift voter attitudes on candidates & policies, often by 10+pp
🔹Exps in US Canada Poland & UK
🔹More “facts”→more persuasion (not psych tricks)
🔹Increasing persuasiveness reduces "fact" accuracy
🔹Right-leaning bots=more inaccurate
AI chatbots can shift voter attitudes on candidates & policies, often by 10+pp
🔹Exps in US Canada Poland & UK
🔹More “facts”→more persuasion (not psych tricks)
🔹Increasing persuasiveness reduces "fact" accuracy
🔹Right-leaning bots=more inaccurate
Reposted by Jakob Kasper
New paper! @william-dinneen.bsky.social @guygrossman.bsky.social Yiqing Xu and I use GPT to code 91k articles from 174 polisci journals (2003–2023)and track research designs, transparency practices, and citations. How has the credibility revolution reshaped the discipline? doi.org/10.31235/osf...
🧵
🧵
December 2, 2025 at 11:46 PM
New paper! @william-dinneen.bsky.social @guygrossman.bsky.social Yiqing Xu and I use GPT to code 91k articles from 174 polisci journals (2003–2023)and track research designs, transparency practices, and citations. How has the credibility revolution reshaped the discipline? doi.org/10.31235/osf...
🧵
🧵
Excited to share a new preprint with @bnbakker.bsky.social, @ylelkes.bsky.social & @gijsschumacher.bsky.social!
doi.org/10.31234/osf...
Affective polarization research focuses almost exclusively on valence, despite affect having at least two core dimensions. We show that emotional arousal matters!
doi.org/10.31234/osf...
Affective polarization research focuses almost exclusively on valence, despite affect having at least two core dimensions. We show that emotional arousal matters!
OSF
doi.org
December 1, 2025 at 2:28 PM
Excited to share a new preprint with @bnbakker.bsky.social, @ylelkes.bsky.social & @gijsschumacher.bsky.social!
doi.org/10.31234/osf...
Affective polarization research focuses almost exclusively on valence, despite affect having at least two core dimensions. We show that emotional arousal matters!
doi.org/10.31234/osf...
Affective polarization research focuses almost exclusively on valence, despite affect having at least two core dimensions. We show that emotional arousal matters!
Reposted by Jakob Kasper
Cas Mudde spells out what has become largely the consensus among researchers: moving right on immigration will not weaken the far right nor strengthen social democracy. If your reaction is "but in Denmark" please at least familiarize yourself with Danish politics
www.theguardian.com/commentisfre...
www.theguardian.com/commentisfre...
The ‘Danish model’ is the darling of centre-left parties like Labour. The problem is, it doesn’t even work in Denmark | Cas Mudde
This week’s local elections are the latest reminder that when social democrats move rightwards, they’re making a mistake, says academic and author Cas Mudde
www.theguardian.com
November 22, 2025 at 11:44 AM
Cas Mudde spells out what has become largely the consensus among researchers: moving right on immigration will not weaken the far right nor strengthen social democracy. If your reaction is "but in Denmark" please at least familiarize yourself with Danish politics
www.theguardian.com/commentisfre...
www.theguardian.com/commentisfre...
Reposted by Jakob Kasper
Those claiming Dems should retreat on racial justice aren't hard-headed realists, they're pushing against the electoral tide rather than leaning into it. The story of Gen Z isn't about racist backlash or red-pilled young men. It's the most racially progressive generation in American history. 🧵
November 14, 2025 at 8:44 PM
Those claiming Dems should retreat on racial justice aren't hard-headed realists, they're pushing against the electoral tide rather than leaning into it. The story of Gen Z isn't about racist backlash or red-pilled young men. It's the most racially progressive generation in American history. 🧵
Reposted by Jakob Kasper
🔍How does young people's anxiety about the future relate to their political attitudes?
Find out in my first PhD paper, just published in the special issue "The Psychology of Pushback" at advances.in/psychology/1...
Find out in my first PhD paper, just published in the special issue "The Psychology of Pushback" at advances.in/psychology/1...
Facing a dark future: Young people’s future anxiety and political attitudes in the UK and Greece
Study finds future anxiety linked to more conservative views among young men, but not young women, in the UK and Greece.
advances.in
October 10, 2025 at 12:38 PM
🔍How does young people's anxiety about the future relate to their political attitudes?
Find out in my first PhD paper, just published in the special issue "The Psychology of Pushback" at advances.in/psychology/1...
Find out in my first PhD paper, just published in the special issue "The Psychology of Pushback" at advances.in/psychology/1...
How do adolescents form their political views, and are they really so different from adults?
Next Friday (Nov 7), the IP-PAD Doctoral Network and @hotpoliticslab.bsky.social host a conference in Amsterdam on adolescents and politics (attached program).
DM or email j.kasper@uva.nl to join.
Next Friday (Nov 7), the IP-PAD Doctoral Network and @hotpoliticslab.bsky.social host a conference in Amsterdam on adolescents and politics (attached program).
DM or email j.kasper@uva.nl to join.
October 31, 2025 at 12:48 PM
How do adolescents form their political views, and are they really so different from adults?
Next Friday (Nov 7), the IP-PAD Doctoral Network and @hotpoliticslab.bsky.social host a conference in Amsterdam on adolescents and politics (attached program).
DM or email j.kasper@uva.nl to join.
Next Friday (Nov 7), the IP-PAD Doctoral Network and @hotpoliticslab.bsky.social host a conference in Amsterdam on adolescents and politics (attached program).
DM or email j.kasper@uva.nl to join.
Reposted by Jakob Kasper
🚨Correction to an earlier post on 📘 64.4
🧠 Can we measure #AffectivePolarization without long surveys?
A 39-country study 📊 by @jakobkas.bsky.social @gijsschumacher.bsky.social & B.Baker find that brief, smartly chosen measures still work if they span major ideological divides
buff.ly/egH1yID
🧠 Can we measure #AffectivePolarization without long surveys?
A 39-country study 📊 by @jakobkas.bsky.social @gijsschumacher.bsky.social & B.Baker find that brief, smartly chosen measures still work if they span major ideological divides
buff.ly/egH1yID
Establishing the construct and predictive validity of brief measures of affective polarization
JAKOB KASPER, GIJS SCHUMACHER, BERT N. BAKKER
ejpr.onlinelibrary.wiley.com
October 30, 2025 at 10:07 AM
🚨Correction to an earlier post on 📘 64.4
🧠 Can we measure #AffectivePolarization without long surveys?
A 39-country study 📊 by @jakobkas.bsky.social @gijsschumacher.bsky.social & B.Baker find that brief, smartly chosen measures still work if they span major ideological divides
buff.ly/egH1yID
🧠 Can we measure #AffectivePolarization without long surveys?
A 39-country study 📊 by @jakobkas.bsky.social @gijsschumacher.bsky.social & B.Baker find that brief, smartly chosen measures still work if they span major ideological divides
buff.ly/egH1yID
Reposted by Jakob Kasper
🚀 And this marks our launch of the CampAIgn Tracker 🇳🇱!
@meinungsfuehrer.bsky.social and I are glad to finally publish our dashboard where we monitor the use of AI imagery in campaign messages, by parties, politicians & other actors during the election #tk2025
See here
www.campaigntracker.nl/en/
@meinungsfuehrer.bsky.social and I are glad to finally publish our dashboard where we monitor the use of AI imagery in campaign messages, by parties, politicians & other actors during the election #tk2025
See here
www.campaigntracker.nl/en/
October 11, 2025 at 8:39 AM
🚀 And this marks our launch of the CampAIgn Tracker 🇳🇱!
@meinungsfuehrer.bsky.social and I are glad to finally publish our dashboard where we monitor the use of AI imagery in campaign messages, by parties, politicians & other actors during the election #tk2025
See here
www.campaigntracker.nl/en/
@meinungsfuehrer.bsky.social and I are glad to finally publish our dashboard where we monitor the use of AI imagery in campaign messages, by parties, politicians & other actors during the election #tk2025
See here
www.campaigntracker.nl/en/
Reposted by Jakob Kasper
These days, everyone is talking about #polarization. But how best to measure it? Olivia Fischer and I have a new paper that empirically compares various operationalizations of polarization (e.g., on people's risk perceptions), including a shiny app to simulate […]
[Original post on mstdn.science]
[Original post on mstdn.science]
October 2, 2025 at 8:13 AM
These days, everyone is talking about #polarization. But how best to measure it? Olivia Fischer and I have a new paper that empirically compares various operationalizations of polarization (e.g., on people's risk perceptions), including a shiny app to simulate […]
[Original post on mstdn.science]
[Original post on mstdn.science]
Reposted by Jakob Kasper
🚨 New publication out @jeppjournal.bsky.social w/ Katrin Praprotnik @luanarusso.bsky.social @markuswagner.bsky.social
We show that coalition signals from the mainstream right to the radical right shift, rather than reduce, existing political divisions.
Open-access article: doi.org/10.1080/1350...
We show that coalition signals from the mainstream right to the radical right shift, rather than reduce, existing political divisions.
Open-access article: doi.org/10.1080/1350...
October 1, 2025 at 3:26 PM
🚨 New publication out @jeppjournal.bsky.social w/ Katrin Praprotnik @luanarusso.bsky.social @markuswagner.bsky.social
We show that coalition signals from the mainstream right to the radical right shift, rather than reduce, existing political divisions.
Open-access article: doi.org/10.1080/1350...
We show that coalition signals from the mainstream right to the radical right shift, rather than reduce, existing political divisions.
Open-access article: doi.org/10.1080/1350...
Reposted by Jakob Kasper
This comment is the brief spiritual successor to our preprint (linked below) in which we argue much ado within debates over causal effects of social media stems from failing to account for the assumptions required by RCTs.
arxiv.org/abs/2505.09254
arxiv.org/abs/2505.09254
July 28, 2025 at 3:41 PM
This comment is the brief spiritual successor to our preprint (linked below) in which we argue much ado within debates over causal effects of social media stems from failing to account for the assumptions required by RCTs.
arxiv.org/abs/2505.09254
arxiv.org/abs/2505.09254
Reposted by Jakob Kasper
Exciting new job in Landau 🤩 We’re searching for a Professor of Political
Psychology (W2). Very much looking forward to your applications – if you
have any questions, please reach out to me. jobs.rptu.de/jobposting/3...
Psychology (W2). Very much looking forward to your applications – if you
have any questions, please reach out to me. jobs.rptu.de/jobposting/3...
W 2-Professur für Politische Psychologie (m/w/d)
jobs.rptu.de
September 25, 2025 at 1:59 PM
Exciting new job in Landau 🤩 We’re searching for a Professor of Political
Psychology (W2). Very much looking forward to your applications – if you
have any questions, please reach out to me. jobs.rptu.de/jobposting/3...
Psychology (W2). Very much looking forward to your applications – if you
have any questions, please reach out to me. jobs.rptu.de/jobposting/3...
Reposted by Jakob Kasper
New pre-print!
Is there a need for domain-specificity when studying mental health (MH) and politics? In our study in the Netherlands, we find political mental health (PMH) is distinct from MH & has unique political correlates, from polarization to ideological extremism.
doi.org/10.31234/osf...
Is there a need for domain-specificity when studying mental health (MH) and politics? In our study in the Netherlands, we find political mental health (PMH) is distinct from MH & has unique political correlates, from polarization to ideological extremism.
doi.org/10.31234/osf...
OSF
doi.org
September 25, 2025 at 1:56 PM
New pre-print!
Is there a need for domain-specificity when studying mental health (MH) and politics? In our study in the Netherlands, we find political mental health (PMH) is distinct from MH & has unique political correlates, from polarization to ideological extremism.
doi.org/10.31234/osf...
Is there a need for domain-specificity when studying mental health (MH) and politics? In our study in the Netherlands, we find political mental health (PMH) is distinct from MH & has unique political correlates, from polarization to ideological extremism.
doi.org/10.31234/osf...
Reposted by Jakob Kasper
At the Department of Political Science (University of Amsterdam, @uva-fmg.bsky.social), we are looking for a new Assistant Professor to join our team. Interested? You can find all details and apply here: werkenbij.uva.nl/en/vacancies....
Vacancy — Assistant Professor in Political Science
The Department of Political Science at the University of Amsterdam invites applications for one and possibly two tenure-track Assistant Professor (Universitair Docent) positions in Political Science w...
werkenbij.uva.nl
September 25, 2025 at 1:14 PM
At the Department of Political Science (University of Amsterdam, @uva-fmg.bsky.social), we are looking for a new Assistant Professor to join our team. Interested? You can find all details and apply here: werkenbij.uva.nl/en/vacancies....
Reposted by Jakob Kasper
Depolarization is not "a scalable solution for reducing societal-level conflict.... achieving lasting depolarization will likely require....moving beyond individual-level treatments to address the elite behaviors and structural incentives that fuel partisan conflict" www.pnas.org/doi/10.1073/...
September 23, 2025 at 7:59 PM
Depolarization is not "a scalable solution for reducing societal-level conflict.... achieving lasting depolarization will likely require....moving beyond individual-level treatments to address the elite behaviors and structural incentives that fuel partisan conflict" www.pnas.org/doi/10.1073/...
Reposted by Jakob Kasper
How much did Elon's takeover reshape Twitter/X? How did the partisan tilt of social media use change from 2020 to 2024?
The ANES 2024 data is out — and this thread answers all your burning questions! 🔥
The ANES 2024 data is out — and this thread answers all your burning questions! 🔥
September 16, 2025 at 11:20 AM
How much did Elon's takeover reshape Twitter/X? How did the partisan tilt of social media use change from 2020 to 2024?
The ANES 2024 data is out — and this thread answers all your burning questions! 🔥
The ANES 2024 data is out — and this thread answers all your burning questions! 🔥
Reposted by Jakob Kasper
Can large language models stand in for human participants?
Many social scientists seem to think so, and are already using "silicon samples" in research.
One problem: depending on the analytic decisions made, you can basically get these samples to show any effect you want.
THREAD 🧵
Many social scientists seem to think so, and are already using "silicon samples" in research.
One problem: depending on the analytic decisions made, you can basically get these samples to show any effect you want.
THREAD 🧵
The threat of analytic flexibility in using large language models to simulate human data: A call to attention
Social scientists are now using large language models to create "silicon samples" - synthetic datasets intended to stand in for human respondents, aimed at revolutionising human subjects research. How...
arxiv.org
September 18, 2025 at 7:56 AM
Can large language models stand in for human participants?
Many social scientists seem to think so, and are already using "silicon samples" in research.
One problem: depending on the analytic decisions made, you can basically get these samples to show any effect you want.
THREAD 🧵
Many social scientists seem to think so, and are already using "silicon samples" in research.
One problem: depending on the analytic decisions made, you can basically get these samples to show any effect you want.
THREAD 🧵
Reposted by Jakob Kasper
🎓 This Friday (19.09), we are honored to welcome professor @ulrikeklinger.bsky.social to the #HotPoliticsLab! She will present her work on Facebook user reactions to party campaigning.
📍 Location: Common Room (REC-B9.22)
💻 Or join us online 👉 teams.microsoft.com/dl/launcher/...
📍 Location: Common Room (REC-B9.22)
💻 Or join us online 👉 teams.microsoft.com/dl/launcher/...
September 17, 2025 at 11:56 AM
🎓 This Friday (19.09), we are honored to welcome professor @ulrikeklinger.bsky.social to the #HotPoliticsLab! She will present her work on Facebook user reactions to party campaigning.
📍 Location: Common Room (REC-B9.22)
💻 Or join us online 👉 teams.microsoft.com/dl/launcher/...
📍 Location: Common Room (REC-B9.22)
💻 Or join us online 👉 teams.microsoft.com/dl/launcher/...
Reposted by Jakob Kasper
🚨New pre-print🚨
"Do citizens’ views of democracy and its actors vary with how they feel?”, @lilymasonphd.bsky.social and I ask in a new paper.
Why would they? While citizens widely endorse democracy in principle, temporary factors often shape their views. Also, work on “irrelevant events"
1/8🧵
"Do citizens’ views of democracy and its actors vary with how they feel?”, @lilymasonphd.bsky.social and I ask in a new paper.
Why would they? While citizens widely endorse democracy in principle, temporary factors often shape their views. Also, work on “irrelevant events"
1/8🧵
September 17, 2025 at 3:11 PM
🚨New pre-print🚨
"Do citizens’ views of democracy and its actors vary with how they feel?”, @lilymasonphd.bsky.social and I ask in a new paper.
Why would they? While citizens widely endorse democracy in principle, temporary factors often shape their views. Also, work on “irrelevant events"
1/8🧵
"Do citizens’ views of democracy and its actors vary with how they feel?”, @lilymasonphd.bsky.social and I ask in a new paper.
Why would they? While citizens widely endorse democracy in principle, temporary factors often shape their views. Also, work on “irrelevant events"
1/8🧵