O valor preditivo do Wisconsin Card Sorting Teste na perda e manutenção de peso após cirurgia bariátrica
: um estudo retrospetivo

  • Pedro Miguel Santos Monteiro (Student)

Student thesis: Master's Thesis


Theoretical foundation: The Wisconsin Card Sorting Test (WCST) is aneuropsychological instrument that appeals to cognitive flexibility (CF), a fundamentalskill in the regulation and adaptation of behaviors. In view of its contribution to weightloss, the main objective was to explore the predictive value of preoperative performancein WCST CF measures in weight loss at 12 (1), 24 (2), and between 12 and 24 (3) monthsafter bariatric surgery (BC). Additionally, the predictive value of psychological factorsand compulsive eating behavior was explored.Methodology: The sample comprised 100 women who underwent BC in a publicHospital in Lisbon. The total weight loss (TWL) was the main variable under analysis,being represented by the following expression: (Initial weight - Final weight) / (Initialweight) ∗ 100. Data from WCST, the Symptom Checklist 90 (SCL-90-R) and the BingeEating Scale (BES) were collected. We performed multiple linear regression models(MLRM) to obtain explanatory models of TWL(1 e 2) and T-Student tests for thecomparison between the group that maintained the weight loss and the one that did notbetween 12 and 24 months.Results: We observed a negative and statistically significant relationship betweenthe number of WCST perseverative responses (PR) and TWL(1 e 2), even after controllingfor age, schooling and symptoms of depression and anxiety. The MLRM allowed theidentification of the number of PR (p<.01) as a highly significant predictor of the TWL1,and the SCL-90-R anxiety and obsession-compulsion index (p<0.01) as highly significantpredictors of TWL(1 e 2).Conclusion: A greater number of PR, which reflects a persistence of poorlyadaptive strategies, seems to support a lower TWL1, a period during which it is essentialto adapt and incorporate new lifestyles into everyday life. The results seem to generateinterest in applying the WCST in psychology sessions prior to BC. However, it isnecessary to replicate the results, circumventing the limitations of the present study.
Date of Award11 Mar 2021
Original languagePortuguese
Awarding Institution
  • Universidade Católica Portuguesa
SupervisorFilipa Ribeiro (Supervisor) & Olga Maria Coelho Rodrigues Atalaia Ribeiro (Co-Supervisor)


  • Wisconsin Card Sorting Test
  • Weight loss
  • Bariatric surgery
  • Cognitive flexibility


  • Mestrado em Neuropsicologia

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