Evidence map›Paper›PMID 30035207›Full record

ArticleCurrent opinion in behavioral sciences2018

It's Not (Only) the Mean that Matters: Variability, Noise and Exploration in Skill Learning.

Dagmar Sternad

Abstract read
In one paragraph

Article in Current opinion in behavioral sciences, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 107 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
107citing papers in PubMed, 1 pooled it
–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

107 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Assessing running stability: a systematic review of methods.BMC sports science, medicine & rehabilitation · 2026
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  14. Virtual reality simulation training in stroke thrombectomy centers with limited patient volume-Simulator performance and patient outcome.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2026
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47 more citing papers are in PubMed but not listed here.

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

1 author.

Dagmar SternadDepartment of Biology, Electrical and Computer Engineering and Physics, Center for the Interdisciplinary Study of Complex Systems, Northeastern University, Boston, MA.

Funding

VARIABILITY AND STABILITY IN SKILL ACQUISITIONR01HD045639 · NICHD · PENNSYLVANIA STATE UNIVERSITY-UNIV PARK · PI STERNAD, DAGMAR · 2004 to 2014
$2.7M
Predictability in Complex Object ControlR01HD087089 · NICHD · NORTHEASTERN UNIVERSITY · PI STERNAD, DAGMAR · 2015 to 2020
$1.8M
Quantification of Predictive Motor Impairments in Individuals with ASDR21HD089731 · NICHD · NORTHEASTERN UNIVERSITY · PI SINHA, PAWAN, STERNAD, DAGMAR · 2017 to 2018
$450k
NICHD NIH HHS R01 HD045639NICHD NIH HHS R01 HD087089NICHD NIH HHS R21 HD089731
6 · The paper itself

Abstract

Mastering a motor skill is typified by a decrease in variability. However, variability is much more than the undesired signature of discoordination: structure in both its distributional properties and temporal sequence can reveal control priorities. Extending from the notion that signal-dependent noise corrupts information transmission in the neuromotor system, this review tracks more recent recognitions that the complex dynamic motor system in its interaction with task constraints creates high-dimensional spaces with multiple equivalent solutions. Further analysis differentiates these solutions to have different degrees of noise-sensitivity, goal-relevance or additional costs. Practice proceeds from exploration of these solution spaces to then exploitation with further channeling of noise. Extended practice leads to fine-tuning of skill brought about by reducing noise. These distinct changes in variability are suggested as a way to characterize stages of learning. Capitalizing on the sensitivity of the CNS to noise, interventions can add extrinsic or amplify intrinsic noise to guide (re-)learning desired behaviors. The persistence and generalization of acquired skill is still largely understudied, although an essential element of skill. Consistent with advances in the physical sciences, there is increasing realization that noise can have beneficial effects. Analysis of the non-random structure of variability may reveal more than analysis of only its mean.

Identifiers

PMID30035207
PMCPMC6051545

What OpenQuestion holds

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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.