Wang Jie, Wang Xinyi, Xin Tao
Reliability and validity of simple Chinese version of grit scale for elementary school students
BMC psychology
relational complexity rc metric reflecting capacity limitation relational processing plays crucial role higher cognitive processes endophenotype several disorders however genetic underpinnings complex relational processing investigated using classical twin model estimated heritability rc genetic overlap intelligence iq reasoning working memory twin sibling sample aged 1529 years n 787 exploratory search genetic loci contributing rc examined associated genetic markers genes discovery sample selected loci replication four independent samples alspac lbc1936 ntr ncng followed metaanalysis n6500 single marker level twin modelling showed rc highly heritable 67 considerable genetic overlap iq 59 major component genetic covariation reasoning working memory 72 molecular level found preliminary support four singlemarker loci one gene dgkb genebased level nps gene influence cognition results indicate genetic sources influencing relational processing key component genetic architecture broader cognitive abilities suggest genetic cascade whereby genetic factors influencing capacity limitation relational processing flowon effect complex cognitive traits including reasoning working memory ultimately iq