Preschool research focuses on studying the cognitive, emotional, social, and physical development of children aged 3-5 years old. Researchers in this area may investigate topics such as the impact of early childhood education on later academic success, the effectiveness of different teaching methods in preschool settings, and the role of play in children's development. Studies in this field often involve observing children in preschool settings, conducting experiments to test theories about early childhood development, and analyzing data to identify patterns and trends. Overall, preschool research aims to better understand how young children learn and grow, with the ultimate goal of informing and improving early childhood education practices.