Internal consistency of the Northwestern Syntax Screening Test.

Area of Science:

• Linguistics
• Developmental Psychology
• Speech-Language Pathology

Background:

• Child language development is complex, with syntax and morphology being crucial components.
• Assessing language impairments in children requires reliable and valid screening tools.
• The Northwestern Syntax Screening Test (NSST) is a tool used to evaluate these skills.

Purpose of the Study:

• To evaluate the clinical utility of the Northwestern Syntax Screening Test (NSST).
• To assess the reliability and item performance of both receptive and expressive components of the NSST.
• To determine the NSST's effectiveness in identifying language impairments in diverse pediatric populations.

Main Methods:

• The study involved three groups of preschoolers: typically developing, language impaired, and mentally retarded, all equated for mental age.
• The 40 receptive and 40 expressive items of the NSST were administered to all participants.
• Hoyt's reliability coefficients and detailed item analyses were conducted.

Main Results:

• Stable Hoyt's reliability coefficients confirmed the NSST's consistent assessment of syntax and morphology in children with atypical language development.
• Detailed item analysis pinpointed specific areas of strength and weakness within the NSST's receptive and expressive sections.
• The NSST demonstrated consistent performance across different groups of children.

Conclusions:

• The Northwestern Syntax Screening Test is a reliable tool for assessing syntax and morphology in children.
• The NSST effectively differentiates language abilities and identifies specific deficits in children with atypical language development.
• The test's item analysis provides valuable insights for targeted language intervention.