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Related Concept Videos

Longitudinal Research02:20

Longitudinal Research

Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
Relationship Formation02:12

Relationship Formation

What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
Longitudinal Studies01:26

Longitudinal Studies

Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
Lateralization01:28

Lateralization

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.
Language and Cognition01:27

Language and Cognition

Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
Huntington Disease l: Introduction01:21

Huntington Disease l: Introduction

Huntington disease or HD is a progressive, fatal neurodegenerative disorder inherited in an autosomal dominant pattern.PathophysiologyIt is caused by expansion of the CAG trinucleotide repeat in the HTT gene on chromosome 4 (4p16.3), producing an abnormal huntingtin protein with an expanded polyglutamine tract. This misfolded protein disrupts cellular function, leading to neuronal death. Normal alleles have ≤26 repeats, 27–35 are intermediate (risk of expansion), 36–39 show reduced penetrance,...

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Related Experiment Video

Updated: Jul 14, 2026

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

On the relationship between handedness and longevity

P A Rogerson1

  • 1Department of Geography, State University of New York at Buffalo 14260.

Social Biology
|January 1, 1993
PubMed
Summary

Left-handers show slightly reduced survival probabilities between ages 65 and 85. This study analyzed 4,448 males to investigate the link between handedness and longevity.

Keywords:
AmericasAnthropometryCauses Of DeathDemographic FactorsDeveloped CountriesHealthHealth Status IndexesLength Of LifeMeasurementMortality--determinantsNorth AmericaNorthern AmericaPopulationPopulation DynamicsProbabilityResearch MethodologyStatistical StudiesStudiesSurvivorshipUnited States

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Area of Science:

  • Longevity research
  • Human biology
  • Epidemiology

Background:

  • Recent studies explore the connection between handedness and lifespan.
  • Understanding factors influencing longevity is crucial for public health.

Purpose of the Study:

  • To review existing literature on handedness and longevity.
  • To quantitatively assess the relationship between handedness and survival probabilities in males.

Main Methods:

  • Survival analysis techniques were employed.
  • Data from a cohort of 4,448 males were analyzed.
  • Statistical significance of handedness on survival was determined.

Main Results:

  • A small but statistically significant decrease in survival probabilities was observed for left-handers.
  • The effect was specifically noted within the 65 to 85-year age range.
  • Right-handedness was associated with higher survival probabilities in this age bracket.

Conclusions:

  • Handedness may be a subtle predictor of longevity in males.
  • Further research is warranted to explore the biological mechanisms underlying this association.
  • Findings contribute to the understanding of factors influencing human lifespan.