A psychologist is interested in how early childhood nutritio…

A psychologist is interested in how early childhood nutrition affects height. To research this subject, the psychologist tracks the nutritional consumption and growth of the same group of infants from age 1 through age 6. This research is utilizing a _____ design. 

At 6 years old, the child could recite the Pledge of Allegia…

At 6 years old, the child could recite the Pledge of Allegiance from memory. At 9 years old, the child began to understand what the terms pledge and republic meant. Finally, at age 12, the child realized the political importance of this pledge. This illustrates the concept of