In Piaget’s ________ stage, the infant thinks about the world by coordinating sensory and motor information

Socioeconomic status is highly correlated with IQ scores

Indicate whether the statement is true or false

According to developmental psychologist K. Warner Schaie, numeric ability tends to increase until the __________, and then stays steady

a) mid-50s, is lower at age 60 b) mid-40s, is lower at age 60 c) mid-30s, is lower at age 60 d) mid-20s, is lower at age 60