This question doesn't seem to be related to the Philippines. However, I can provide you a brief on the cognitive development during middle adulthood. Middle adulthood, usually defined as ages 40 to 65, marks a period in which individuals have reached a peak in their careers and are planning for their future retirement. Cognitively, people in this age group typically exhibit high levels of expertise and knowledge in their professional fields, thanks to years of experience and learning. While memory capabilities, such as the ability to recall names or specific details, might slightly decrease, other cognitive aspects like problem-solving, comprehension, and reasoning skills often remain stable during this life stage. This is at least partly due to their ability to utilize crystallized intelligence, which is the ability to use skills, knowledge, and experience. One specific aspect of cognitive development in middle adulthood is the transition from acquiring knowledge to utilizing it. This stage is associated with a shift towards using accumulated knowledge to better understand the world and to make more informed decisions. Lastly, while cognitive decline is a common concern during this period, studies suggest that engaging in mentally stimulating activities, maintaining a healthy lifestyle, and learning new things can help keep the brain sharp. It’s also important to note that individual experiences in middle adulthood can vary greatly, with many people reporting improvements in their cognitive abilities well into their later years.