In early word productions, the same types of errors are manifest in children with cochlear implants (CI) as in their normally hearing (NH) peers with respect to consonant clusters. However, the incidence of those types and their longitudinal development have not been examined or quantified in the literature thus far. Furthermore, studies on the…

In the present study, we investigated genetic and environmental effects on motor impulsivity from childhood to late adolescence using a longitudinal sample of twins from ages 9 to 18 years. Motor impulsivity was assessed using errors of commission (no-go errors) in a visual go/no-go task at 4 time points: ages 9-10, 11-13, 14-15, and 16-18 years.…

How phonological disorders should be categorized in Turkish children remained vague for a long period of time due to a lack of normative studies. This paper reports the phonological systems of 70 phonologically disordered children, aged 4;0-8;0, in comparison with the results of a normative study of 665 Turkish-speaking children, aged 1;3-8;0. The…

This longitudinal study evaluated grammatical judgments of "well formedness" of children (N=21) with specific language impairment (SLI). Comparison with two control groups found that children with SLI rejected morphosyntactic errors they didn't commit but accepted errors they were likely to make. Findings support the extended optional infinitive…

Longitudinal study examined 6-year-olds' performance in tasks involving a protagonist with partial information about an object or a person. Found that children who demonstrated some understanding of the consequences of limited information access often made other errors. Despite intervening additions of contextual support and clarifications, the…

Changes in consonant and syllable-level error patterns of three children diagnosed with childhood apraxia of speech (CAS) were investigated in a 3-year longitudinal study. Spontaneous speech samples were analyzed to assess the accuracy of consonants and syllables. Consonant accuracy was low overall, with most frequent errors on middle- and…

The acquisition of case and gender marking on the definite and indefinite article was studied in a sample of 6 normally-hearing children and 9 children with cochlear implants. Longitudinal spontaneous speech data are used. Children were matched by MLU, with 4 MLU levels: 1.8, 2.8, 3.6, 4.8. Age ranges for normally-hearing children were 1;4 to 3;8…

A longitudinal study of English acquisition by a Vietnamese mother and her daughter is reported. Subjects of this study are Lan, a young Vietnamese woman in her late twenties, and her daughter Than, who was four years old at the time this study began. Neither knew any English when they resettled in Texas in the summer of 1975 after fleeing from…