Determination of frequency in behavior observations: Pilot study of sampling method Shinya Hisano 1 , Hajime Shimizu 2 1Doctor's Degree Program, Graduate School of Health Sciences, Hiroshima University 2Institute of Health Sciences, Hiroshima University Faculty of Medicine Keyword: 行動観察 , 妥当性 , (サンプリング法) , (観察頻度) , Behavior observation , Validity , Sampling method , Frequency of observation pp.443-451
Published Date 2003/10/15
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 Objective. The objective of this study was to investigate the extent to which observation frequency could be reduced to obtain a necessary mean in behavioral observations.

 Method. The behaviors of 2 subjects were observed for 12 hours with a sampling frequency of a 5minute interval. The data obtained was used as the population, and data obtained from a Bernoulli trial, in which the sampling frequency was gradually reduced, was used as the sample for simulation. The incidence of events in the sample was compared with the incidence of the population event. The required sampling frequency was determined from an estimated precision formula.

 Results. There was no significant difference in events between the present study and the incidence of events observed in the 5-minute interval sampling (number = 145) and in the 10〜60-minute interval sampling (number = 73〜13).

 Conclusion. We found that 30〜60-minute interval sampling led appropriately to the result: a 5minute interval sampling of observation. It is necessary that more research be done to explore the frequency of behavior observation.

Copyright © 2003, Japanese Association of Occupational Therapists. All rights reserved.


電子版ISSN 印刷版ISSN 0289-4920 日本作業療法士協会