Dutch preschool organizations were approached for participation in the study, of which 46 preschools (64 preschool groups) agreed. Children were selected based on their age (from 2.5 to 3.5 years of age) at first testing and the children had to attend preschool for at least the following nine months, resulting in a total of 385 preschool children (mean age = 35.8 months, SD = 3.6 months, 48.3% girls). We followed the Dutch Central Bureau for Statistics (Centraal Bureau voor de Statistiek [CBS], 2009) in their definition of children from a non-native background family as those Sepantronium of whom one or both parents were born in a country other than The Netherlands. Accordingly, 119 children (30.9%) were from non-native background families. Children\'s home languages vary. Differences in their prior experiences with the Dutch language, either as L1 or L2, are mutation reflected in the first vocabulary measurement. SES was based on parent\'s highest, self-reported educational level. If the highest educational level was primary school or lower general secondary education, the SES was classed as low (19.5%). When the highest educational level was vocational training or higher general secondary education, the SES was classed as medium (37.1%). When the highest educational level was college or university education, the SES was classed as high (43.4%).
↧