A total of 60 infants of 7 weeks of age were tested in a habituation-dishabituation looking procedure to determine if they could discriminate between infant-directed talk (IDT) and adult-directed talk (ADT) uttered by the same speaker. One group of 12 infants was habituated to a female speaker's ADT and dishabituated to the same speaker's IDT, while another group was treated in the reverse order. Two other groups were presented with auditory stimuli, but with a male speaker's voice. One control group was tested with the female IDT in habituation and dishabituation phases. Observers measured the amount of time infants looked at a visual stimulus, a black and white checkerboard pattern, which was presented simultaneously with the auditory stimuli. Results showed that babies of 7 weeks were able to discriminate between speech directed towards adults and that directed towards infants, whether it was delivered by a male or a female. Findings also indicated that 7-week-old infants preferred IDT over ADT, regardless of speaker's sex. Preferences, however, were not as robust as those found among 4-month-old infants. It is concluded that research can now move toward investigation of the effect of differential experiences with IDT on infant preference. Implications are discussed. (RH)