demonstrating intelligence by means of motor activity without the use of symbols, "object permanence" or the ability to use their memory to recall objects and events, physical mobility, development of early language skills
Children demonstrate intelligence through the use of symbols, such as letters, number, and pictorial representations of real-life objects, language abilities begin to develop considerably, "egocentric" thinking is prevalent during this stage
Concrete Operational Stage
Logical thinking develops, solve concrete hands-on problems in a logical fashion, "conservation", classify objects and put them into lists based on a standard criterion, logical sequences in reverse "reversibility" or "operational thinking"
Formal Operational Stage
Solve increasingly complicated abstract problems using logic
the complex process whereby an individual learns to interact cooperatively with other in society - in families, schools, sports, churches, clubs