“…Contrary to popular perception, the childâs
gender usually only explains about 1% to 3% of reported variance in vocabulary size
or related variables (Ardila, Rosselli, Matute, &
Inozemtseva, 2011 ; Szagun, Steinbrink,
Franik, & Stumper, 2006 ; for a review see Hyde, 2014). This makes gender differences likely to be
detectable in large samples only (e.g., Berglund et
al., 2005 ; Bornstein et al, 2004
; Leaper & Smith, 2004), but even a
recent study that included more than 5,000 one- to six-year olds did not find
reliable differences with regard to boysâ and girlsâ language skills
(Luijk et al, 2015).…”