18 Months Old - Autonomy Starts Here

​Please keep in mind as you read the following lists of developmentally appropriate behaviors, that no two children are alike.  Some children might exhibit all the age-related characteristics, some might exhibit most, and there are some children who might not exhibit more than one or two. 

When using the list below, it is important to also consider your child’s adjusted age if applicable, environmental, and situational factors, the child’s temperament, and if the child is in a period of equilibrium or disequilibrium. ​

An 18-month old child usually but not always:

• does the opposite of most instructions given by a parent
• seldom obeys any verbal command
• uses “No!” as chief word
• is not motivated by words
• is not able to wait — NOW is the time that is important
• cannot stand frustration
• constantly seems to find ways to frustrate self
• treats people like objects (will step on, push, hit others, including babies, without remorse)
• has no concept of sharing
• needs one word commands (which probably won’t be followed)
• is very limited in what he understands, even though he now can use words to some extent
• is extremely immature emotionally; may tantrum easily and often
• has boundless energy and needs many outlets for it (especially stair climbing)
• can be distracted or lured away from a forbidden object or activity

Much of the following information is based on the studies by The Gesell Institute of Human Development, with the primary source being Your One Year Old, by Louise Bates Ames, Ph.D. Also included is information from Pick Up Your Socks by Elizabeth Crary. This information Can be found at the centerforparentingeducation.org