Describe the typical changes in cognitive abilities observed through the lifespan. One of your friends argues that actual age-related cognitive decline is likely to be even greater than the studies suggest. Another friend disagrees, saying that the studies most likely overestimate decline. From what you have learned in PSY393, what methodological factors might cause a study to underestimate cognitive decline? What methodological factors might cause a study to overestimate cognitive decline? In your opinion, which friend is more likely to be correct? Explain why you think so.