An infant is expected to be able to walk unassisted, can show separation anxiety, and say their first words (not necessarily 5 new words) at 12-15 months. By 1.5 years (18 months) of age, a toddler is expected to say around 10 words and throw a ball. A child is expected to be able to copy a square around age 5.

At 1.5 years of age, a child is expected to be able to stack 3 blocks and use about 10 individual words. A toddler can say around 250 words by the age of 2. Secondly, a child is expected to be able to copy a circle by the age of 3. Lastly, a child is expected to catch a ball with two hands by the age of 5.

A child normally, if applicable, begins having imaginary companions at 4 years of age. During this time they are also expected to be able to hop on one foot, copy a cross, play cooperatively with other children, and express themselves clearly verbally. A child is not expected to be able to copy a square until age 5. Children learn to tie shoelaces and read by the age of 6. 

A child is expected to be able to catch a ball with both hands by 5 years. During this time they are also expected to be able to copy a square, skip using both feet, and may show romantic feelings for the opposite sex (4-5 years of age). At the age of 2, most children can kick a ball. At 3 years, most children can climb stairs using alternate feet. At the age of 4, children are expected to be able to catch a ball with their arms. 

A child is expected to be able to draw a cross by the age of 4. A square is typically copied by 5 years, and a triangle by 6 years. The ability to copy a diamond is not expected until the age of 7.

Edward Titchener (1867-1922) was a member of the structuralist field of thought. He and the other structural psychologists aimed to reduce psychological phenomena down to its basic mental processes.

An infant is expected to say their first words at 12-15 months, show object permanence, walk unassisted, and can exhibit separation anxiety. At 4-6 months, infants start to babble or repeat sounds. At 7-11 months, infants can imitate sounds but not usually say their first word yet. At 16-18 months, toddlers are expected to be able to say around 10 words. 

An infant starts imitating sounds, using gestures, and responding to their own name and simple instructions at 7-11 months. By 12-15 months, an infant is expected to say their first words. At 4-6 months, infants start to babble or repeat sounds but don't yet respond to their own name. At 1-3 months, infants are only cooing or gurgling in response to attention. 

During the grade school years (age 6 to 12 years) the parenteral role is to stimulate curiosity and pleasure in intellectual success so that the child develops a sense of competence, as opposed to feelings of inferiority and expectations of failure.