Before the 1960s, bilingualism was considered a handicap that slowed a child's development by forcing them to spend too much energy distinguishing between languages, a view based largely on flawed studies.
Antes de la década de los 60, al bilingüismo se le consideraba un discapacidad que alentaba el desarrollo del niño al forzarlo a usar demasiada energía para distinguir entre dos idiomas, una perspectiva basada en gran medida en estudios sin validez.