The test-retest reliability of the McCarthy Screening Test

Area of Science:

• Educational Psychology
• Developmental Psychology
• Psychometrics

Background:

• Accurate identification of learning problems in early childhood is crucial for timely intervention.
• The Multilevel School Test (MST) is used to assess 5- and 6-year-olds for potential learning difficulties.
• Understanding the test-retest reliability of the MST is essential for its valid application.

Purpose of the Study:

• To examine the test-retest reliability of the Multilevel School Test (MST).
• To determine if the MST is sufficiently stable for identifying children at risk for learning problems.

Main Methods:

• A large sample of 971 five- and six-year-old children were initially tested.
• A subset of 276 children identified as 'at risk' were retested 4 to 10 weeks later.
• Reliability coefficients for the six subtests of the MST were calculated and analyzed.

Main Results:

• Reliability coefficients for the MST subtests varied widely, ranging from .30 to .83.
• These coefficients were compared to those reported in the MST test manual.
• The obtained reliability suggests considerable instability in test scores over a short period.

Conclusions:

• The Multilevel School Test (MST) demonstrates insufficient test-retest reliability for independent use.
• The MST alone is not stable enough to reliably identify young children with potential learning problems.
• Caution is advised when using MST results for diagnostic or screening purposes without supplementary data.