The expressive portion of the NSST compared to a spontaneous language sample

Area of Science:

• Child language development
• Clinical linguistics
• Speech-language pathology

Background:

• Children diagnosed with language delays often exhibit difficulties with syntactic structures.
• Assessing expressive language in young children requires reliable and valid instruments.
• The Northwestern Syntax Screening Test (NSST) is a tool used to evaluate syntactic development.

Purpose of the Study:

• To examine the relationship between syntactic structures assessed by the NSST and those used in spontaneous language.
• To determine if the NSST accurately reflects a child's overall language performance.
• To evaluate the effectiveness of the NSST as a diagnostic tool for language delay.

Main Methods:

• Administered the NSST to 12 children diagnosed with language delay (ages 4 years 1 month to 5 years 11 months).
• Collected spontaneous language samples from the same children via a speech clinician and their mothers.
• Analyzed and compared syntactic structures produced on the NSST with those in the spontaneous samples.

Main Results:

• Thirty percent of syntactic structures incorrectly produced on the NSST were correctly produced in spontaneous language samples.
• Language samples collected by clinicians contained a significantly greater number of correctly produced syntactic structures than those collected by mothers.
• The NSST's item analysis did not accurately represent the children's spontaneous language abilities.

Conclusions:

• The expressive portion of the NSST may not provide a comprehensive or accurate measure of a child's syntactic performance.
• Relying solely on the NSST for language assessment might lead to misinterpretations of a child's true language capabilities.
• The NSST should be primarily considered a screening instrument, with results supplemented by spontaneous language analysis for accurate diagnosis.