This episode delves into predicting dementia severity changes following shunt surgery for idiopathic normal-pressure hydrocephalus (iNPH). Based on an abstract from Clinical Neurology and Neurosurgery (2026), we explore the role of the tap test and various cognitive assessments in identifying patients likely to experience significant improvement. The study design, population, and key findings regarding the optimal assessment tools and timing for the tap test are discussed. Understanding these predictive factors can significantly impact clinical decision-making and patient selection for shunt surgery. This summary is for informational purposes only and does not constitute medical advice.