ArticleJournal of circadian rhythms2026
Time-of-Day Effects on Competitive Speedcubing Performance.
Article in Journal of circadian rhythms, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
0 citing papers in PubMed.
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Authors and funding
1 author.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Competitive speedcubing - the timed solving of Rubik's Cube puzzles under standardised World Cube Association (WCA) rules - uniquely couples rapid visuospatial processing and working memory with high-speed bimanual fine motor execution, making it a tractable paradigm for investigating time-of-day associations in real-world expert cognitive-motor performance. We analysed 6,600 record-setting performances across four puzzle categories (3 × 3 × 3, 4 × 4 × 4, 5 × 5 × 5, 6 × 6 × 6) from WCA competitions held between 2003 and 2025 using an exposure-adjusted framework in which record probability is expressed as records per attempt within 15-minute local-time bins, evaluated against a within-competition permutation null that preserves schedule structure. Raw record counts exhibit a bimodal distribution with morning and evening peaks; however, exposure adjustment demonstrates that this pattern is substantially attributable to the non-uniform scheduling of competition rounds across the day. After schedule correction, the 4 × 4 × 4 event shows a statistically significant suppression of record probability during the 12:30-15:00 window (outside-to-inside ratio: 1.14×; one-tailed permutation
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