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The second method can be difficult when considering the differing normative data and other factors that affect typical speech development. Many norms are based on age expectations in which a majority of children of a certain age are accurately producing a sound (75% or 90% depending on the study).
Even though children do not produce their first words until they are approximately 12 months old, the ability to produce speech sounds starts to develop at a much younger age. Stark (1980) distinguishes five stages of early speech development: [16]
Physical development. By this age, infants may have doubled their birth weights. They typically grow about 0.8 inches (2.0 cm) and gain about 1 to 1.5 pounds (450 to 680 g) during this month. [28] Fat rolls ("Baby Fat") begin to appear on thighs, upper arms and neck. Motor development. May be able to roll from front to back. [29]
Early signs of stuttering usually show up at 18- to 24-months of age, as there is an increase in vocabulary which results in children putting together sentences. However, it can also occur later ...
The average child masters about fifty words by the age of eighteen months. These might include words such as, milk, water, juice and apple (noun-like words). Afterwards they acquire 12 to 16 words a day. By the age of six, they master about 13 to 14 thousand words.
Some milestones are more variable than others; for example, receptive speech indicators do not show much variation among children with typical hearing, but expressive speech milestones can be quite variable. [81] A common concern in child development is delayed development of age-specific developmental milestones. Preventing, and intervening ...
The CDC divides these milestones into several categories for each age, including social and emotional behaviors, language and communication skills, cognitive abilities and physical development and ...
A child speech corpus is a speech corpus documenting first-language language acquisition. Such databases are used in the development of computer-assisted language learning systems and the characterization of children's speech at difference ages. [1] Children's speech varies not only by language, but also by region within a language.