Evidence map›Paper›PMID 38376622›Full record

ArticleMemory & cognition2025

Watching videos of a drawing hand improves students' understanding of the normal probability distribution.

Icy Yunyi Zhang, Xiaohan Hanna Guo, Ji Y Son, Idan A Blank, James W Stigler

Abstract read
In one paragraph

Article in Memory & cognition, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing 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

2 citing papers in PubMed.

  1. Drawing or gesturing? Prior knowledge moderates the impact of embodied pedagogies.Cognitive research: principles and implications · 2026
    Article
  2. Article
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

5 authors.

Icy Yunyi ZhangDepartment of Psychology, University of California, Los Angeles, CA, 90095-1563, USA. yunyi9847@g.ucla.edu.ORCID 0000-0003-3423-6794
Xiaohan Hanna GuoDepartment of Psychology, University of California, Los Angeles, CA, 90095-1563, USA.ORCID 0000-0002-8938-5458
Ji Y SonDepartment of Psychology, California State University, Los Angeles, CA, USA.ORCID 0000-0002-4258-4791
Idan A BlankDepartment of Psychology, University of California, Los Angeles, CA, 90095-1563, USA.ORCID 0000-0001-7057-8391
James W StiglerDepartment of Psychology, University of California, Los Angeles, CA, 90095-1563, USA.ORCID 0000-0001-6107-7827

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Understanding normal probability distributions is a crucial objective in mathematics and statistics education. Drawing upon cognitive psychology research, this study explores the use of drawings and visualizations as effective scaffolds to enhance students' comprehension. Although much research has documented the helpfulness of drawing as a research tool to reveal students' knowledge states, its direct utility in advancing higher-order cognitive processes remains understudied. In Study 1, qualitative methods were utilized to identify common misunderstandings among students regarding canonical depictions of the normal probability distribution. Building on these insights, Study 2 experimentally compared three instructional videos (static slides, dynamic drawing, and dynamic drawings done by a visible hand). The hand drawing video led to better learning than the other versions. Study 3 examined whether the benefits from observing a hand drawing could be reproduced by a dynamic cursor moving around otherwise static slides (without the presence of a hand). Results showed no significant learning difference between observing a hand drawing and a moving cursor, both outperforming a control. This research links the cognitive process of drawing with its educational role and provides insights into its potential to enhance memory, cognition, and inform instructional methods.

Indexed as

ComprehensionLearningStudentsAdolescentAdultFemaleHandHumansMaleProbabilityYoung AdultDrawingDynamic representationEmbodied cognitionMultimedia learningStatistics instruction

Identifiers

PMID38376622
PMCPMC11779760

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Registered trials

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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.