一、认识儿童的心理行为发育 Piager's Periods of Deyelopment 感觉运动期 Sensomotor,Birth to 2 years) 前运算期 Preoperational subperiod,2-6 yrs) 具体运算期 concrete operational subperiod,7-11 yrs The Swiss psychologist Jean Piaget studied children's 形式运算期 cognitive development by observing and talking with Formal operational, his own youngsters and 12 yrs through others. adulthoodPiaget’s Periods of Development 感觉运动期 ( Sensomotor, Birth to 2 years) 前运算期 ( Preoperational subperiod, 2-6 yrs) 具体运算期 ( concrete operational subperiod, 7-11 yrs ) 形式运算期 ( Formal operational, 12 yrs through adulthood ) 一、认识儿童的心理行为发育