Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Lateralization01:28

Lateralization

889
Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
889
Cerebral Hemispheres01:05

Cerebral Hemispheres

1.8K
The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
1.8K
Genetic Variation01:25

Genetic Variation

1.1K
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
1.1K
Dosage Regimen: Individualization01:24

Dosage Regimen: Individualization

122
Individualization in dosing regimens is the customization of medication doses for individual patients. Its necessity arises from the goal of maximizing therapeutic benefits while minimizing risks. This approach is pivotal because human responses to drugs can vary widely; what is effective for one person may be inadequate or excessive for another. Interpatient (intersubject) variability refers to differences in drug responses between individuals, while intrapatient (intrasubject) variability...
122
Variability: Analysis01:11

Variability: Analysis

381
Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
The range is a simple measure of variability, indicating the difference between the highest and...
381
Regression Toward the Mean01:52

Regression Toward the Mean

6.8K
Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when...
6.8K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Measuring across modalities: Protophones as acoustic attention-getters in infant object communication.

Infant behavior & development·2026
Same author

Infants Assume Questions Serve an Information-Seeking Function, Link Them to Interrogative Sentences and Differentiate Them From Assertions.

Child development·2025
Same author

Young sanctuary-living chimpanzees produce more communicative expressions with artificial objects than with natural objects.

Royal Society open science·2025
Same author

Quantity of spontaneous touches to body and surface in very preterm and healthy term infants.

Frontiers in psychology·2025
Same author

Easy-fix attentional focus manipulation boosts the intuitive and deliberate use of base-rate information.

Memory & cognition·2024
Same author

Study protocol of the Hungarian Longitudinal Study of Healthy Brain Aging (HuBA).

Ideggyogyaszati szemle·2024
Same journal

Profiles of power: lateral posing asymmetries of emotional expression in political portraits.

Laterality·2026
Same journal

Do emotional faces modulate pupillary pseudoneglect?

Laterality·2026
Same journal

Breaking the binary: Mixed-handedness and its implications for theoretical and clinical laterality research.

Laterality·2026
Same journal

Laterality of rodent behaviour: Why it matters for basic and clinical neuroscience and an outline for reverse-translational laterality research.

Laterality·2026
Same journal

Is there handedness for tactile acuity? A systematic review and meta-analysis.

Laterality·2026
Same journal

Development of the left-handedness stigmatization scale for the Middle East and North Africa region (LHSS-MENA): expert validity ratio, exploratory factor and confirmatory factor analyses.

Laterality·2026
See all related articles

Related Experiment Video

Updated: Dec 28, 2025

Block Building Task Identifies Distinct Groups of Left/Right-hand Choice Patterns After Unilateral Peripheral Nerve Injury
07:06

Block Building Task Identifies Distinct Groups of Left/Right-hand Choice Patterns After Unilateral Peripheral Nerve Injury

Published on: March 21, 2025

989

Right-handed one day, right-handed the next day?

Jacqueline Fagard1, Daniela Corbetta2, Eszter Somogyi1

  • 1Integrative Neuroscience Cognitive Center, University Paris Descartes CNRS, Paris, France.

Laterality
|February 19, 2020
PubMed
Summary
This summary is machine-generated.

Infant hand preference can fluctuate, but daily testing over five days shows reliable directional results. While most infants showed consistent hand use, the degree of preference varied, indicating test-retest reliability for direction but not degree.

Keywords:
Handednessinfantshort-term test-retest evaluation

More Related Videos

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
07:24

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers

Published on: April 21, 2017

12.9K
Design, Fabrication, and Administration of the Hand Active Sensation Test HASTe
07:54

Design, Fabrication, and Administration of the Hand Active Sensation Test HASTe

Published on: September 8, 2015

9.5K

Related Experiment Videos

Last Updated: Dec 28, 2025

Block Building Task Identifies Distinct Groups of Left/Right-hand Choice Patterns After Unilateral Peripheral Nerve Injury
07:06

Block Building Task Identifies Distinct Groups of Left/Right-hand Choice Patterns After Unilateral Peripheral Nerve Injury

Published on: March 21, 2025

989
A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
07:24

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers

Published on: April 21, 2017

12.9K
Design, Fabrication, and Administration of the Hand Active Sensation Test HASTe
07:54

Design, Fabrication, and Administration of the Hand Active Sensation Test HASTe

Published on: September 8, 2015

9.5K

Area of Science:

  • Developmental Psychology
  • Neuroscience
  • Human Motor Control

Background:

  • Hand preference, or handedness, emerges early in development.
  • Infant handedness shows fluctuations, raising questions about the reliability of single-session assessments.
  • Short-term test-retest reliability of infant handedness assessments is under-researched.

Purpose of the Study:

  • To evaluate the short-term test-retest reliability of infant handedness.
  • To determine if single-session testing provides reliable handedness results in infants aged 9-15 months.

Main Methods:

  • 21 infants (9-15 months) underwent a standardized handedness test daily for 5 sessions.
  • Handedness Index (HI) and handedness category were calculated for each session.
  • Comparisons were made across sessions at both group and individual levels.

Main Results:

  • Group-level handedness distribution remained stable across the 5 sessions.
  • At the individual level, 52.4% of infants showed consistent hand use (lateralization) across sessions.
  • Only 19% were consistently right-handed; most fluctuations were between lateralized and non-lateralized states.

Conclusions:

  • Infant handedness testing demonstrates fair reliability for the direction of hand preference (right vs. left).
  • The degree of hand preference shows less reliability in repeated short-term testing.
  • Results suggest caution when interpreting the precise degree of handedness from single assessments in this age group.