Compare and contrast the research findings on cognitive changes in adulthood relative to the research design used to collect the data (longitudinal, cross-sectional). Describe how the research design influenced the findings, reviewing the strengths and limitations of each design.

What is republicanism? a. a form of government in which power is concentrated in one political party b. a form of government in which power is held by the poople and exercised by elected representatives. c. a form of govenment in which power is divided betweon the state and national levels. d .a form of government in which power is divided among co-equal branches