Certain facets of preservation happen before others. They construct onto one another in a process that is hierarchal (Poulin-Dubois, D
For other cognitive principles children were presented with different stimuli, for example a tall thin glass and a shorter stout one (both that held equal amounts of liquid) and then decide which had more water in it (conservation; Berk, 2011; Burman, 2008). The results of Piaget's research was a stage model of cognitive development including four major stages (Berk, 2011): The Sensorimotor stage (birth to two years of age); The Preoperational stage (two to about seven years of age); The Concrete Operational Stage (seven to about eleven years of age); and The Formal Operational stage (eleven years and beyond)
Piaget's initial research subjects were children from birth to seven (he also studied people through the age of adulthood). In actuality, Piaget's early subjects were his own children; later he studied children of different ages under laboratory situations (Burman, 2008)
The cognitive development of children is of interest to this writer as a budding pediatric psychologist. Piaget's model, while criticized, has stood the test of time and remains the basic model of cognitive development presented in developmental psychology textbooks as well as a being a general framework for research and theory development in the field (Egan, 2012)
According to Piaget theory, children of these ages use symbols and make imaginary friendships. (Berger, 2014)
Moreover, they are not intuitive and not able to develop a rational thinking. (Kail, 2011)
Thus, the way parents enforce rules and interact with their children influence children behaviors. (Schechter, & Willheim, 2009)