Alexa, play "Baby" by Justin Bieber
This is the substage where infants rely on reflexes like sucking and grasping to interact with their environment.
What is Reflexive Schemes (Birth to 1 Month)?
Understanding the thoughts, desires, and beliefs of others
What is the theory of mind?
Law of Conservation for ages 6-7
What is the age that conservation of liquid and mass-acquired?
In this substage, infants begin to repeat actions focused on their own body, such as thumb-sucking, because it brings them pleasure.
What is Primary Circular Reactions (1–4 Months)?
This test is about understanding that others can hold beliefs, intentions, or perspectives different from their own, even if those beliefs are incorrect. Primarily used on kids
What is the false-belief test?
Law of conservation for ages 7-8 (circles)
What is the age at which conservation of class inclusion is acquired?
Shaking a rattle to hear its sound or dropping objects to see what happens are examples of behaviors in this substage.
What is Secondary Circular Reactions (4–8 Months)?
The process of rapidly relating words to real-world events or objects, resulting in vocabulary increasing to around 15,000 words
What is fast mapping?
Law of conservation for ages 8-10 (cows)
What is the age at which conservation of area is acquired?
During this substage, infants show intentionality and begin to develop object permanence by searching for hidden objects.
What is Coordination of Secondary Circular Reactions (8–12 Months)?
Milestones: negation, opposites by relationship, analogies by category, compound sentences, personal pronouns (not yet possessive)
What are the milestones that occur between 3 and 4 years of age?
This term describes the thinking process that takes multiple variables into consideration
What is decentration?
This substage is marked by trial-and-error experimentation, such as dropping objects from various heights to observe the results.
What is Tertiary Circular Reactions (12–18 Months)?
Milestones: participating in turn-taking beyond three turns in a conversation on the same topic and maintaining track of conversation contents over many unrelated turns. Developing an understanding of humor and using riddles and jokes as a form of play
What are the milestones that occur between 4 and 5 years of age?
This term describes the ability to mentally undo a physical or mental transformation
What is mental reversibility?