The literature on infant habituation was reviewed for evidence of sex differences in perfonnance. While a majority of the studies do not report analyses for sex differences, studies finding such differences still constitute a significant proportion of the literature. Twenty-two procedural variables were examined in relation to the varying outcomes of the studies. The findings suggest that sex differences in habituation perfonnance are related to the distribution of habituation training and implicate faster stimulus processing by male infants and/or more complete or detailed processing by females.