Which test is frequently used to assess set-shifting and cognitive flexibility in an executive function battery?

• A. Trail Making Test Part B.
• B. Stroop Color-Word Test.
• C. Wisconsin Card Sorting Test.
• D. Card guessing test.

Answer: (C)

Set-shifting and cognitive flexibility involve changing strategies in response to changing rules. The Wisconsin Card Sorting Test puts this to the test by having you sort cards according to an implicit rule (color, shape, or number) that changes during the task. You must infer the current rule from feedback and then switch to the new rule when it changes. The hallmark of this process is how well you move away from an old rule and adopt a new one, measured by perseverative errors when you keep applying the outdated rule. This dynamic requirement to adapt and manage abstract rules makes the Wisconsin Card Sorting Test a central tool in executive function batteries for assessing cognitive flexibility and set-shifting. Other tests tap related processes—like shifting attention or inhibiting responses—but they don’t engage the flexible rule discovery and strategy switching as comprehensively as the Wisconsin Card Sorting Test.