Group Decision Experiment on Fukushima Soil Disposal Policy

Yume Souma's dataset contains experimental results from a study on competitive versus cooperative deliberation contexts. The study involved 128 Japanese university students organized into 32 groups discussing the final disposal of soil removed after the Fukushima nuclear accident. Data was uploaded to figshare in April 2026.

Use Cases

• Analyze the relationship between 'competitive context' or 'cooperative context' manipulation and subsequent 'decision evaluation' scores.
• Model 'opinion change' outcomes based on experimental condition and pre-discussion opinions.
• Examine how participants whose 'pre-discussion opinions' were not reflected in group decisions rated outcomes under different conditions.
• Study group-level decision outcomes on the specific policy topic of 'final disposal of removed soil outside Fukushima Prefecture'.

Strengths

• Experimental design with 128 participants across 32 controlled groups.
• Clear manipulation of two independent variables: competitive and cooperative controversy contexts.
• Data is shared under a permissive CC-BY-4.0 license.

Limitations

• Small sample size of 128 participants from a single demographic (Japanese university students).
• Limited scope to one specific policy topic, reducing generalizability.
• Dataset is very small at 9.5 KB, indicating limited raw data or few variables.

Provenance

Source

Yume Souma via figshare.

Collection Method

Controlled group decision experiment with participants assigned to competitive or cooperative discussion conditions.

Time Range

Experimental study period not specified; dataset published in 2026.

Freshness

Last updated April 2026.

Geography

Study conducted with participants in Japan; topic specific to Fukushima Prefecture policy.