Twenty-one videotape recorded interactions of 42 preschool children (aged 3;4 to 5;3) in same-sexed dyads were coded and analysed to see how these children used the word no in their interactions. Results showed that while boys and girls used the word no equally frequently, they were found to use the word in different ways. A trend for boys to use no when correcting or prohibiting their playmate's behaviour more often than girls was revealed. Girls were more likely to provide reasons for denying or rejecting their playmate's proposition or suggestion. The overall findings of this study are comparable to previously reported results indicating that males and females employ different styles of speech in order to accomplish the same goal. However, unlike most studies conducted on language and sex, this study offers a unique approach in that it examines how boys and girls use a word that occurs equally frequently in their vocabulary to accomplish different goals.