Measuring Representative Communication in Young Children with Developmental Delay.

Area of Science:

• Developmental Psychology
• Speech-Language Pathology
• Quantitative Research Methods

Background:

• Generalizability and decision studies offer a mathematical framework for measurement stability.
• Assessing communicative behavior in young children requires reliable and representative measures.
• Existing debates question which assessment type yields the most representative scores.

Purpose of the Study:

• To conduct a generalizability and decision study on toddlers with developmental delay.
• To quantify the stability of communication and vocabulary measures over time and across contexts.
• To evaluate the impact of an intervention targeting communication and vocabulary goals.

Main Methods:

• A generalizability and decision study was performed on 63 toddlers with developmental delay.
• Participants received a 6-month intervention focused on communication and vocabulary.
• Two variables (rate of intentional communication acts, rate of different words) were measured across three contexts and four sampling periods.

Main Results:

• Measurement stability for both intentional communication acts and different words increased over time.
• Developmental progress positively influenced measurement stability.
• The type of assessment procedure did not significantly affect measurement stability.

Conclusions:

• Generalizability and decision studies provide a robust framework for evaluating measurement reliability in pediatric populations.
• Measurement stability in young children's communicative behavior improves with time and development.
• The findings support the use of these studies as an alternative to traditional assessment debates.