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Open Imaging Index
MRI Brain

ACSID (FOR2974)

FOR2974: Affective and cognitive mechanisms of specific Internet-use disorders (ACSID)

German multi-site DFG research unit on gaming, pornography, buying-shopping and social-networks use disorders. Some subprojects add task fMRI, e.g. an appetitive conditioning and extinction study in 83 men on 3 T Siemens MRI. Images are not public; data on request.

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Overview

ACSID is a research unit (FOR2974) funded by the German Research Foundation that studies the psychological and neural mechanisms behind gaming, pornography use, buying-shopping and social-networks use when these become addictive. Teams at Duisburg-Essen, Bochum, Bamberg, Giessen, Mainz, Lübeck and Hannover test participants with unproblematic, risky and pathological use with one shared core battery of tasks, questionnaires, biomarkers and a six-month follow-up. The website reports more than 1,200 participants in total, but most of that work is behavioural. Brain imaging is limited to a few subprojects that add task fMRI, so this entry covers only those imaging data, which are not public.

Composition

The one fMRI sample with a published size comes from subproject RP3, which looks at appetitive conditioning and extinction. It enrolled 83 men: 25 with gaming disorder, 23 with risky gaming and 35 non-problematic users. A paper on the healthy control group of the same project analysed 31 men aged 19 to 38. The subproject pages describe further fMRI work: cue reactivity in gaming and pornography use disorders (RP4) in the first funding period, and punishment sensitivity (RP3), stress and habitual cue reactivity (RP4) and cue reactivity in buying-shopping and social-networks use disorders (RP10) in the second. Their completed sample sizes are not published.

Acquisition

The RP3 controls were scanned on a 3 T Siemens MAGNETOM Prisma with a 64-channel head coil. Each session had a T1-weighted structural scan and whole-brain T2*-weighted echo-planar BOLD imaging (3 mm voxels, TR 2 s) during a conditioning task. Gaming, pornographic and monetary rewards served as unconditioned stimuli, and skin conductance and ratings were recorded alongside. RP10 reuses the cue-reactivity fMRI protocol of the first-period RP4 study.

Annotations

None. The data are task fMRI with behavioural and questionnaire measures, not labelled images.

Known limitations

No imaging data are public. The OSF project holds preregistrations and materials only. Data are available on request from the study authors. The published imaging samples are small and male-only, and no total imaging count for the research unit is published. The scanner is reported only for the RP3 control group.

Cohort

Aggregate numbers from the sources below. Bars are relative to the 83 subjects.

Sex

  • Male 83 100%

Abstract in Krikova et al. 2026, Behavioural Brain Research

Contrast / sequence

subjects, values can overlap

  • BOLD fMRI 83 100%
  • T1-weighted 31 37%

Abstract in Krikova et al. 2026, Behavioural Brain Research; Section 2.6 in Krikova et al. 2024, Human Brain Mapping (PMC11128778)

Scanner vendor

subjects

  • Siemens Healthineers 31 37%

Section 2.6 in Krikova et al. 2024, Human Brain Mapping (PMC11128778)

Field strength

subjects

  • 3 T 31 37%

Section 2.6 in Krikova et al. 2024, Human Brain Mapping (PMC11128778)

License and access

Our reading of the license, not legal advice. Before you use the data, read the original license and confirm that your use is allowed. We take no responsibility for how you use a dataset. Full disclaimer

Access
On request

Ask the authors or the data holder. No published process or terms, and access is at their discretion

Access page

No published license or data use terms

The data holder has published no license and no data use terms. Any use, sharing or commercial right has to be agreed with the data holder, and nothing can be assumed to be allowed. Default copyright and data protection law still apply.

The data availability statement of Krikova et al. 2024 says the data are available on request from the corresponding author and are not public because of privacy or ethical restrictions. The OSF project holds preregistrations and study materials but no imaging data, and states no license. No terms are published.

Original license text Checked 2026-10-08

What you can do

  • Commercial use Not stated
  • Not stated
  • Train ML models Not stated
  • Create derived data Not stated
  • Publish results Not stated

What you can share

  • Share the data Not stated
  • Share derived data Not stated
  • Share trained models Not stated

What you must do

  • Cite or credit Not stated
  • Share alike Not stated
  • Sign an agreement Not stated
  • Ethics approval Not stated
  • Manuscript review Not stated
  • Release code Not stated
  • Return results Not stated
  • Delete after use Not stated

Limits

  • No re-identification Not stated
  • Location limits Not stated

Citation

Brand M, Müller A, Stark R, Steins-Loeber S, Klucken T, Montag C, Diers M, Wolf OT, Rumpf HJ, Wölfling K, Wegmann E. Addiction Research Unit: Affective and cognitive mechanisms of specific Internet-use disorders. Addiction Biology 26(6), e13087 (2021). doi:10.1111/adb.13087

Sources

Every number on this page comes from one of these documents. Each chart names the table or page it is taken from. The raw numbers are in stats.csv.