International Journal of Psychology and Psychological Therapy

Volume 14 Num. 2 - June 2014


Impaired performances in a stimulus for relapsing-remitting multiple sclerosis patients versus controls

Volume 14 Num. 2 - June 2014 - Pages 191-202


Sandra Vanotti , ?ngel Tabullo , Evangelina E. Cores , Leticia Fiorentini , Orlando Garcea , Alberto A. Yorio


The objectives of this study were to determine whether patients with Multiple Sclerosis (MS) have difficulties in a stimulus equivalence task, and to assess the potential relationship between their difficulties and cognitive impairment. A total of 12 MS patients and matched controls completed the stimulus equivalence task. Patients with MS also completed measures of a neuropsychological evaluation that included the Brief Repeatable Battery in Multiple Sclerosis, Trail Making A and B, the Wechsler Adult Intelligence (Digit Span), the Wisconsin Card Sorting Test, the California Verbal Learning Test, the Wechsler Memory Scale (Logic Memory), and the Boston Naming Test. The stimulus equivalence task showed that MS patients had poorer performance and slower response times as compared with controls in the stimulus equivalence task. There was a significant correlation among stimulus equivalence task parameters and indexes of executive function and memory from the neuropsychological evaluation.

Key words:

stimulus equivalence, category learning, multiple sclerosis, cognitive impairment

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