First, the statistical power was not high because of small sample size (58 severe ROP and 42 mild or no ROP). The small sample size may be one of the reasons why no genes reached genome-wide significance in this study. Second, although we tried to include phenotypic extremes to overcome...
MATHEMATICS educationConcreteobjectsusedtoillustratemathematicalideasarecommonlyknownasmanipulativesManipulativesareubiquitousinNorthAmericanelementaryclassroomsintheearlyyears,andalthoughtheycanbebeneficial,theydonotguaranteelearningInthepresentstudy,theauthorsexaminedtwofactorshypothesizedtoimpactsecond-graders'learningofplace...