“…Answering the first research question and looking at the antecedent factors, in line with some previous studies (Baten & Desoete, 2018;Desoete, 2008), but in contrast with other studies on birth weight (Breslau et al, 2004;Chatterji et al, 2014;De Rodrigues et al, 2006;Klein et al, 1989) and birth order (Belmont & Marolla, 1973;Cheng et al, 2012;Hotz et al, 2015;Zajonc & Markus, 1975) these antecendent factors could not significant explain variance in fact retrieval or calculation accuracy in our sample. However gender as antecendent factor, attributed to the variance in both math components.…”