certain toys, such as barbie dolls and toy soldiers, are often perceived as being more acceptable for one gender than the other. the turning point for the addition of gender to toys came about in the 1960s and 1970s. before 1975, only about two percent of toys were labeled by gender, whereas today on the disney store's website, considered a dominating global force for toys by researcher claire miller, all toys are labeled by gender. the journal "sex roles" began publishing research on this topic in 1975, focusing on the effects of gender in youth. too, many psychological textbooks began to address this new issue. along with these publications, researchers also started to challenge the ideas of male and female as being opposites, even going as far as to claim toys which have characteristics of both gender are preferable.