Reliability of the Speech Sounds Perception Test

Area of Science:

• Neuropsychology
• Psychometrics

Background:

• The Speech Sounds Perception Test is a component of the Halstead-Reitan Neuropsychological Test Battery.
• Existing research has focused on the test-retest reliability, with limited data on internal reliability.
• Clinical observations suggest varying difficulty levels across subtests.

Purpose of the Study:

• To examine the internal reliability of the Speech Sounds Perception Test.
• To assess the potential utility of an abbreviated version of the test.
• To identify patterns of errors across different subtests.

Main Methods:

• Internal reliability was assessed using split-half methods in two independent samples (N=106 and N=81).
• Error patterns were analyzed across subtests and test halves.
• A formula for an abbreviated version was developed and tested for classification accuracy.

Main Results:

• Both samples demonstrated significant errors on the first half of the test.
• Subtests B and A showed the highest error rates, while Subtests E and D had the fewest.
• Split-half reliability coefficients were .74 and .87 for the two samples.
• The proposed formula for an abbreviated version achieved high classification rates (96% and 90%).

Conclusions:

• The Speech Sounds Perception Test exhibits adequate internal reliability.
• Subtest difficulty varies, with potential implications for test administration and interpretation.
• An abbreviated version, using the derived formula, shows promise for efficient and accurate classification.