Premium
Basic Unit of Statistical Analysis in Behavioral Teratology *
Author(s) -
TACHIBANA Toshiaki
Publication year - 1985
Publication title -
congenital anomalies
Language(s) - English
Resource type - Journals
eISSN - 1741-4520
pISSN - 0914-3505
DOI - 10.1111/j.1741-4520.1985.tb00649.x
Subject(s) - litter , statistics , statistical analysis , mathematics , unit (ring theory) , ecology , biology , mathematics education
Several issues related to two possible approaches in the data analysis was discussed: Using individual scores (per subject approach) or litter mean scores (per litter approach), as the basic unit of analysis. Correlations among litter mates, and magnitudes of type I error rate distortion when individual scores instead of litter mean scores were: employed, were discussed. It is advisable to assess the dependence of animals among litter mates for the data obtained in the respective studies. Statistical power and magnitude of eta squared associated with the two approaches were discussed. The per litter approach produces more reliable results by aggregation.