Telegraphic+speech

<span style="background-attachment: initial; background-clip: initial; background-color: #ffffff; background-image: initial; background-origin: initial; background-position: initial initial; background-repeat: initial initial; border-top-color: #ff3300; border-top-style: solid; border-top-width: 3px; display: block; font-family: inherit; font-size: 12px; font-style: inherit; font-weight: inherit; margin-bottom: 1.5em; margin-left: auto; margin-right: auto; margin-top: 0px; padding-bottom: 0px; padding-left: 15px; padding-right: 15px; padding-top: 0px; position: relative; text-align: left; text-decoration: inherit; width: 930px;"> Telegraphic speech > (Erika Hoff, ////Language Development////, 3rd ed. Wadsworth, 2005)
 * <span style="font-family: inherit; font-family: inherit; font-size: 12px; font-size: 12px; font-style: inherit; font-style: inherit; font-weight: inherit; font-weight: inherit; list-style-type: disc; margin-bottom: 0px; margin-bottom: 1.5em; margin-left: 0px; margin-left: 18px; margin-right: 0px; margin-right: 0px; margin-top: 0px; margin-top: 1.5em; padding-bottom: 0px; padding-bottom: 0px; padding-left: 0px; padding-left: 0px; padding-right: 0px; padding-right: 0px; padding-top: 0px; padding-top: 0px; position: relative; text-decoration: inherit; text-decoration: inherit;">"Exactly why these grammatical factors (i.e., function words) and inflections are omitted [in telegraphic speech] is a matter of some debate. One possibility is that the omitted words and __[|morphemes] __ are not produced because they are not essential to meaning. Children probably have cognitive limitations on the length of utterances they can produce, independent of their grammatical knowledge. Given such length limitations, they may sensibly leave out the least important parts. It is also true that the omitted words tend to be words that are not stressed in adults' utterances, and children may be leaving out unstressed elements (Demuth, 1994). Some have also suggested that children's underlying knowledge at this point does not include the grammatical categories that govern the use of the omitted forms (Atkinson, 1992; Radford, 1990, 1995), although other evidence suggests it does (Gerken, Landau, & Remez, 1990)."