:

What is one finding about middle adulthood from the Seattle longitudinal study is that it is a time of peak performance for certain cognitive abilities?

The landmark Seattle Longitudinal Study, which began in 1956, revolutionized our understanding of aging and intellect, revealing that cognitive decline is far from universal. A key finding about middle adulthood from the Seattle longitudinal study is that it is a time of peak performance for several important cognitive skills, not a period of decline.