The GDO-R stands for which instrument?

• A. Growth and Development Observation Register
• B. Gesell Developmental Observation
• C. Genetic Developmental Outcomes Rating
• D. General Development Observation Report

Answer: (B)

This question tests your knowledge of what the GDO-R abbreviation stands for in developmental assessment. The GDO-R is the revised form of the Gesell Developmental Observation. The Gesell Developmental Observation is a well-known tool used to document a young child’s development across multiple domains—such as motor, language, social/adaptive behavior—by observing how the child performs typical tasks and tracking milestones against age-appropriate norms. The “R” signals that this is a revised version of the original Gesell Developmental Observation.

The other names listed don’t correspond to a recognized instrument tied to this abbreviation, so Gesell Developmental Observation (with the revised edition implied by the R) is the correct match.