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PaperFren

Curated scientific intelligence

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Developments across the published libraries, ranked by evidence, connection, and — if you follow topics — relevance to you. Each card is a movement in the literature: what changed, how the evidence is labeled, and why it matters.

Each development carries an evidence label. What the labels mean

Sleep · Working memory

Published 2019 · Explained Sep 2026

Sleep loss hurts young adults' working memory — and left older adults' scores intact in another study

Evidence: Contested

What changed

Two papers in the PaperFren library disagree by age group. Neither is large enough to settle the question. The conservative reading is: costs are clearer in young adults here; older-adult resilience was observed in a highly screened sample on a short task.

2 studies · Two laboratory sleep-deprivation studie…

Bilingualism · Executive function

Published 2014 · Explained Sep 2026

A careful test finds no bilingual advantage — and the executive-function tasks barely agree with each other

Evidence: Contested

What changed

This paper is a central piece of the contested bilingual-advantage debate: no advantage here, plus evidence that popular EF tasks do not measure the same thing. It does not rule out effects in children, older adults, or other sociolinguistic contexts.

3 studies · Individual-differences / between-group …