Evidence map›Paper›PMID 42850271›Full record

ArticleNature human behaviour2026

Microdelays disrupt online learning.

Asaf Mazar, Geoff Tomaino, Abubakir Siedahmed, Ahmad Abdolsaheb, Neil T Heffernan, Ziv Carmon, Angela L Duckworth

Abstract read
PubMed Publisher
In one paragraph

Article in Nature human behaviour, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Asaf MazarThe Wharton School, University of Pennsylvania, Philadelphia, PA, USA. asafsmazar@gmail.com.ORCID http://orcid.org/0000-0003-1459-0542
Geoff TomainoWarrington College of Business, University of Florida, Gainesville, FL, USA.ORCID http://orcid.org/0000-0002-0034-1679
Abubakir SiedahmedWorcester Polytechnic Institute, Worcester, MA, USA.
Ahmad AbdolsahebfreeCodeCamp, Istanbul, Turkey.
Neil T HeffernanWorcester Polytechnic Institute, Worcester, MA, USA.
Ziv CarmonINSEAD, Singapore, Singapore.
Angela L DuckworthThe Wharton School, University of Pennsylvania, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0002-2644-3729

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

An ever-growing share of education happens on screens. We examine an overlooked feature of modern education: 'microdelays'-brief loading lags that could hinder learners with slower internet connections. In two longitudinal quasi-experimental field studies, microdelays as short as 1-2 s predicted impaired learner engagement and achievement. When faced with microdelays, US primary and secondary school students (N = 26,707) completed fewer online math assignments, took longer to complete assignments, were more likely to get distracted mid-task and earned lower scores. Likewise, when aspiring coders, primarily in Latin America (N = 55,184), experienced microdelays, they spent less time actively engaged, multitasked more often, completed fewer lessons and were less likely to attain a key course milestone. Our results held across a range of model specifications, and leverage within-person variation in load times to support a causal interpretation. These findings identify microdelays as a hitherto-overlooked barrier in online learning.

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.