Normative data for measuring performance change on parallel forms of a 15-word list recall test

Area of Science:

• Neuropsychology
• Cognitive Psychology
• Neurology

Background:

• Declarative memory evaluation is crucial for assessing neurological disorders.
• Longitudinal assessment tracks memory changes due to time or treatment.
• Standardized methods are needed for reliable performance change interpretation.

Purpose of the Study:

• To collect data for measuring and interpreting performance changes in verbal declarative memory.
• To establish normative data for assessing recall accuracy discrepancies.
• To validate a method for interpreting memory test score variations.

Main Methods:

• Administered three parallel forms of a verbal recall test to 100 healthy adults (aged 20-80).
• Subjects completed immediate and delayed recall of 15-word lists across three sessions, at least one week apart.
• Randomized list order and analyzed performance correlations and variations.

Main Results:

• High correlation between performance across the three parallel test forms.
• No significant variation in performance based on the order of list presentation.
• Slight, but statistically significant, differences in recall accuracy between lists.

Conclusions:

• The study provides normative data for interpreting discrepancies in verbal memory test scores.
• This data aids in distinguishing genuine memory decline from random variation in healthy individuals.
• The findings support the use of parallel test forms for longitudinal declarative memory assessment.