Survey methodologist, statistician, data all-rounder. (Social) researcher by heart (at @IssrUq). Enjoys sports, traveling, good food, entertaining his daughter.
Joined August 2022
- Tweets 34
- Following 64
- Followers 24
- Likes 15
4 Photos and videos
Jan 15
Last month, we published another @SurveyFutures working paper. The study investigates measurement mode effects by comparing live video interviewing with in‑person interviewing in a large-scale birth cohort study. @CLScohorts @GeorgePloubidis @gabidurrant surveyfutures.net/wp-content…
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7 Oct 2025
Our study investigating the feasibility of using a look-up approach to collect occupation data is now available on the @SurveyFutures website: surveyfutures.net/wp-content…
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1 Sep 2025
In my latest paper published in Quality & Quantity, I examine recruitment to a university-managed volunteer online panel and the impact of post-survey weighting (particularly the choice and combination of raking covariates) on sample representativeness. doi.org/10.1007/s11135-025-0…
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13 Aug 2025
Our paper with PJ Lavrakas is now out in the International Journal of Market Research. We examine motivations & barriers to questionnaire completion in a nonprobability online panel, and identify five distinct psychographic profiles of panellists. More at doi.org/10.1177/147078532513…
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Sebastian Kocar retweeted
12 May 2025
📣SAVE THE DATE
Our friends at @CityStGeorges will be hosting our Survey Futures international conference, taking place on 17-18 June 2026. We will explore the Future of Survey Data Collection, presenting findings from our nine research strands, plus panel discussions and more.
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12 Mar 2025
Our evidence review on occupation coding in self-completion surveys (with Matt Brown & @_DrLisaC from @CLScohorts) is now available on @SurveyFutures website: surveyfutures.net/wp-content… (other project publications are also available there)
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Sebastian Kocar retweeted
19 Sep 2024
Our thanks to the research leads and authors on this work @gabidurrant @SurveySeb Matt Brown, Tim Hanson, Carole Sanchez, Martin Wood, Kate Taylor, Maria Tsantani, Tom Huskinson @unisouthampton @ucl @CityUniLondon @NatCen @ipsos surveyfutures.net/working-pa…
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Sebastian Kocar retweeted
New article from @SurveySeb on the investigation between wave communications that could serve as cost-effective panel maintenance activities to increase completion in panel surveys. Read it today. bit.ly/3UfcDs3
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Sebastian Kocar retweeted
6 Feb 2024
🚨Our new paper in PHN @NS_Publications highlights the impact of food insecurity in #Tasmania
🛒 As household food insecurity worsens, diet quality declines across all food groups
🥗Solutions needed to ensure everyone has access to healthy food
doi.org/10.1017/S13689800240…
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6 Dec 2023
Just published my final piece from my PhD thesis - the article on RDD text-to-web is now available in @tweetijmr. It covers (almost) everything you need to know to implement text-to-web (with or without RDD) in practice. Read it here: doi.org/10.1177/147078532312…
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17 Oct 2023
Seriousness aside, "Understanding Australia" sounds more like a hybrid between @SRCentreAUS's Life in Australia (we used data from this online panel) and Understanding Society longitudinal survey (@usociety). I do like this blended name for a future study in Australia, though.🙂
16 Oct 2023
Just published in Survey Practice! An experiment in the Understanding Australia survey shows how researchers can maximize the representativeness of panel surveys, without spending a fortune to continually recruit new participants.
#openaccess
buff.ly/3LMiLoc
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12 Oct 2023
Another paper on motivations to participate in online panels with P.J. Lavrakas has just been published in @SurveyPractice.
In this one, we present a method that could help improve representation for a very low cost by utilizing self-reported motivations: surveypractice.org/article/8…
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7 Aug 2023
Thrilled to see our meta-analysis (with @lkaczmirek) finally out! A thorough analysis of recruitment rates/practices in 28 probability-based online panels is now published in the International Journal of Social Research Methodology at doi.org/10.1080/13645579.202… #Stats #survey
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31 Jul 2023
Our paper with Bernie Baffour on improving accuracy of Australian nonprobability online panel samples has been published in @gesis_ord's mda: doi.org/10.12758/mda.2023.04. While challenging, we showed how carefully designed post-survey adjustment can be successful in reducing bias.
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Sebastian Kocar retweeted
17 Jul 2023
Great to see our work with @ISC_UTAS being discussed on #radionational
Over half of Tasmanians suffer food insecurity abc.net.au/radio/programs/am…
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28 Apr 2023
Very happy to see our paper with P. J. Lavrakas on Social-psychological Aspects of Probability-based Online Panel Participation published in @IJPOR_Journal, especially since we demonstrated how qualitative data can be used to study non-response phenomena: doi.org/10.1093/ijpor/edad01…
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Sebastian Kocar retweeted
Registered Report authors!
🚫Had a manuscript rejected?
↩️Withdrawn a manuscript?
Share your experiences and help build a picture of how @RegReports peer review is implemented across journals:
registeredreports.cardiff.ac…
📊Current stats: 246 pieces of feedback across 54 journals
ALT Screenshot of main website dashboard, listing journals which offer (or have offered) the Registered Reports manuscript format. Author/reviewer ratings across the speed and quality categories are aggregated, allowing website users to sort by either category.
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Sebastian Kocar retweeted
13 Mar 2023
Just published in Survey Practice! Using weights based on past votes to improve estimates of voting intentions.
surveypractice.org/article/7…
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