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A relative age effect in NASCAR.

Ernest L Abel¹, Michael L Kruger

¹Department of Obstetrics and Gynecology, Wayne State University, USA. eabel@wayne.edu

Perceptual and Motor Skills

|April 3, 2008

Summary

NASCAR drivers show uneven birth month distributions, with most born in spring. This suggests a "relative age effect" in motorsports, impacting driver selection based on age cutoffs.

Area of Science:

Sports Science
Human Kinetics
Motor Sports Performance

Background:

The relative age effect (RAE) is a phenomenon where athletes born earlier in the eligibility year are overrepresented in elite sports.
Understanding RAE in motorsports can provide insights into talent identification and development pathways.

Purpose of the Study:

To investigate the distribution of birth months among NASCAR drivers.
To determine if a relative age effect exists in professional stock car racing.

Main Methods:

Analysis of birth month data for a cohort of 1054 NASCAR drivers.
Comparison of quarterly birth month distributions to identify significant variations.

Main Results:

Significant differences were observed in the quarterly birth month distribution of NASCAR drivers.

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The period of April-June showed the highest concentration of driver births at 27.1%.

Other quarterly periods ranged from 23.6% to 24.7%.

Conclusions:

The study provides evidence for a relative age effect in NASCAR.
The observed birth month distribution may influence driver selection and career trajectories in motorsports.