Psychometric Procedures vs Descriptive Assessment for Preschool and School-Age Children with Language Disorders
by Katie Engle
Psychometric procedures are used to assess language abilities. A psychometric measurement differs from a descriptive measurement in that it depends on standardized testing and statistical data (Denman et al., 2017). These assessments provide valuable information regarding the current level of language ability of a child and data that will be collected through assessment will be shared with the guardians of the child. This reality alone supports the idea that well-grounded psychometric properties are vital for standardized assessment (Denman et al., 2017).
Psychometric procedures, or normalist assessments, are often normed, meaning that average or typical scores are presented. It is important to note that most often, children with language disorders fall below the norming group of these tests. The statistical characteristics supported in psychometric procedures include specificity/sensitivity, reliability, and validity (Owens, 2024).
In this approach, the SLP’s role is to understand the measurements tested and administer the assessment accurately. Psychometric data allows for objectivity regarding skill level. In regards to numbers, information can be viewed as reliable and valid. However, these measurements contain limitations in that they cannot capture the complexity of language ability, and the unique qualities presented in each child being tested.
This is where the descriptive assessment approach comes into play. A descriptive approach is built on observation, spontaneous conversation sampling, and dynamic assessment (Owens, 2024). In this approach, the SLP can be clinician-directed, basing and adjusting the assessment based on the unique qualities of the child. The focus is to assess behavioral components of language in a naturalistic environment to gain an understanding of how the environment inhibits or encourages language (Descriptive Assessments - Screening and Assessment, n.d.). The limitations of this approach are that validity and reliability are dependent on the clinician having a high level of language expertise (Owens, 2024).
So, which do we choose as SLPs? It is recommended that the Integrated Functional Assessment strategy is utilized, as it is a combined assessment approach providing well-rounded information regarding the child’s language abilities.
References
Denman, D., Speyer, R., Munro, N., Pearce, W. M., Chen, Y.-W., & Cordier, R. (2017). Psychometric properties of language assessments for children aged 4–12 Years: A systematic review. Frontiers in Psychology.
Descriptive Assessments - Screening and Assessment. (n.d.). Docs.autismspeaks.org.https://docs.autismspeaks.org/screening-and-assessment/descriptive-assessments
Owens, R. E. (2024). Language disorders : a functional approach to assessment and intervention in children. Plural Publishing, Inc.