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A note on the stability of team performance.

R S Landis1

  • 1Department of Psychology, Tulane University, New Orleans, Louisiana 70118, USA. rlandis1@mailhost.tcs.tulane.edu

The Journal of Applied Psychology
|June 23, 2001
PubMed
Summary

This study analyzed professional basketball team performance over 10 years. Results showed decreasing correlations between yearly winning percentages over time, becoming unexpectedly negative, challenging typical performance stability expectations.

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Area of Science:

  • Sports Science
  • Performance Analytics
  • Statistical Modeling

Background:

  • Understanding team performance stability is crucial in professional sports.
  • Previous research often assumes consistent performance trends over time.

Purpose of the Study:

  • To evaluate the stability of professional basketball team performance over a decade.
  • To investigate the temporal correlation patterns in team winning percentages.

Main Methods:

  • Analysis of yearly winning percentages for 23 professional basketball teams.
  • Calculation of an intercorrelation matrix to assess performance relationships across time periods.

Main Results:

  • Strong positive correlations were observed between adjacent time periods.

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  • Correlations systematically decreased as intervening time periods increased.
  • Significant negative correlations between earlier and later performance were found, which is atypical.

    • Conclusions:

    • Professional basketball team performance exhibits complex temporal dynamics.
    • The observed negative correlations challenge conventional models of performance stability.
    • Further research is needed to explore explanations and boundary conditions for these findings.