additional indicator as to which caregivers will provide developmental support. When adults engage in CDS with infants, they are providing positive emotion and attention, signaling to infants that they are valued. CDS can also serve as a priming tool for infants to notice the faces of their caregivers. Infants are more sensitive to the pitch and emphasized qualities of this method. Therefore, when caregivers use CDS, they expand the possibility for their infants to observe and process facial expressions. This effect could in part be due to infants associating CDS with positive facial expressions such as smiling, being more likely to respond to CDS if they expect to receive a positive response from their caregiver. CDS may promote processing of word forms, allowing infants to remember words when asked to recall them in the future. As words are repeated through CDS, infants begin to create mental representations of each word. As a result, infants who experience CDS are able to recall words more effectively than infants who do not. Infants can pick up on the vocal cues of CDS and will often pattern their babbling after it. Children of depressed mothers, who do not regularly use CDS, display delayed language development. Even when depressed mothers provide their infants with positive faces, infants do not respond to their attempts at CDS, and in turn do not benefit from this important route for language acquisition. Infants are unable to create the link between speech and visual face movements in situations such as these. When fathers who are not depressed are able to provide the stimulation of CDS, infants respond well and are able to compensate from the deficit left by their mothers. This too can inhibit language and speech development. Therefore, this deficit can be especially harmful to infants with depressed mothers and little contact with male caregivers. Socioeconomic status has been found to influence the development of vocabulary and language skills. Lower-status groups tend to be behind the development of children in higher-status families. This finding is thought to be due to the amount of time parents spend with the child and the ways they interact; mothers from higher-status groups are found to say more to their children, use more variety, and speak in longer sentences. Aid to cognitive development Shore and others believe that CDS contributes to mental development as it helps teach the child the basic function and structure