Performance on the Modified Card Sorting Test by normal, healthy individuals: relationship to general intellectual...

Area of Science:

• Neuropsychology
• Cognitive Psychology
• Psychometrics

Background:

• The Modified Card Sorting Test (MCST) is a key tool for assessing executive functions, particularly cognitive flexibility.
• Establishing normative data is crucial for accurate interpretation of MCST performance in diverse populations.
• Understanding factors influencing MCST performance aids in diagnosing and managing cognitive impairments.

Purpose of the Study:

• To generate normative data for the Modified Card Sorting Test (MCST) in a healthy British population.
• To investigate the relationship between MCST performance, general intellectual ability, and demographic variables.
• To provide percentile norms for MCST indices to enhance clinical utility.

Main Methods:

• Administered the MCST and Wechsler Adult Intelligence Scales--Revised to 146 healthy adults aged 16-75.
• Ensured sample demographic distribution (age, sex, socioeconomic class) mirrored the British population.
• Collected data to analyze correlations between cognitive performance, intellectual quotient, and demographic factors.

Main Results:

• Most participants (56.6%) completed six categories, with frequent perseverative errors noted in some individuals (approx. 8% made >50% perseverative errors).
• MCST performance demonstrated significant associations with age, years of education, and general intellectual ability (Full Scale Intelligence Quotient - FSIQ).
• Individuals with FSIQ below 100 exhibited greater performance variability compared to those with FSIQ above 100.

Conclusions:

• MCST performance is more strongly correlated with general intellectual ability than with demographic variables.
• The study successfully established normative data and detailed percentile norms for the MCST.
• Findings underscore the importance of considering intellectual ability when interpreting MCST results in clinical and research settings.