Journal of Psychopathology and Behavioral Assessment

, Volume 8, Issue 1, pp 31–38

A post hoc correction procedure for systematic errors in time-sampling duration estimates

  • Hoi K. Suen
  • Donald Ary

DOI: 10.1007/BF00960870

Cite this article as:
Suen, H.K. & Ary, D. J Psychopathol Behav Assess (1986) 8: 31. doi:10.1007/BF00960870


Numerous previous studies have shown that partial-interval sampling in direct observation systematically overestimates duration and underestimates frequency. Whole-interval sampling systematically underestimates both duration and frequency. This paper presents a post hoc method through which the systematic errors in duration estimates in partial-interval sampling and whole-interval sampling can be minimized.

Key words

systematic errorbehavioral observationobserver accuracytime samplingduration estimate

Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • Hoi K. Suen
    • 1
  • Donald Ary
    • 1
  1. 1.Northern Illinois UniversityDeKalb