According to the Seattle Longitudinal Study, when does plateauing in intellectual performance typically begin?

The Seattle Longitudinal Study provides valuable insights into the patterns of intellectual performance across the lifespan. Research indicates that plateauing in intellectual performance typically begins during the mid-50s, as cognitive functions may start to stabilize rather than continually improve. In this phase, individuals often reach a point where their accumulated knowledge and skills level off, indicating a plateau in cognitive abilities rather than a decline.

This finding is significant as it highlights the cognitive changes that occur as people age, illustrating how intellectual performance evolves over time. Understanding the timing of these changes is crucial for developing educational and occupational strategies that can enhance cognitive functioning throughout different life stages.