child points to an object such as a couch the mother may say "couch" in response. Labeling can also be characterized as referencing. Some language development experts have characterized child directed speech in stages. Primarily, the parents use repetition and also variation to maintain the infant's attention. Secondly, the parent simplifies speech to help in language learning. Third, any speech modifications maintain the responsiveness of the child. These modifications develop into a conversation that provides context for the development. Cultural and socioeconomic effects While most children throughout the world develop language at similar rates and without difficulty, cultural and socioeconomic differences have been shown to influence development. An example of cultural differences in language development can be seen when comparing the interactions of mothers in the United States with their infants with mothers in Japan. Mothers in the United States use more questions, are more information-oriented, and use more grammatically correct utterances with their 3-month-olds. Mothers in Japan, on the other hand, use more physical contact with their infants, and more emotion-oriented, nonsense, and environmental sounds, as well as baby talk, with their infants. These differences in interaction techniques reflect differences in "each society's assumptions about infants and adult-to-adult cultural styles of talking." Specifically in North American culture, maternal race, education, and socioeconomic class influence parent-child interactions in the early linguistic environment. When speaking to their infants, mothers from middle class "incorporate language goals more frequently in their play with their infants," and in turn, their infants produce twice as many vocalizations as lower class infants. Mothers from higher social classes who are better educated also tend to be more verbal, and have more time to spend engaging with their infants in language. Additionally, lower class infants may receive more language input from their siblings and peers than from their mothers. Social preconditions It is crucial that children are allowed to socially interact with other people who can vocalize and respond to questions. For language acquisition to develop successfully, children must be in an environment that allows them to communicate socially in that language. Children who have learnt sound, meaning and grammatical system of language that can produce clear sentence may still not have the ability to use language effectively in various social circumstance. Social interaction is the footing stone of language. There are a few different theories as to why and how children develop language. One popular, yet heavily