Here is a brief summary of Table 1.2 in Cerridwen (2014). You can also find the complete table here. This is the numbering system I’m going to be using on this blog.
This is just a brief overview for reference, and it’s rough because I’m going from memory.
This is the level of animal intelligence. In humans it typically extends from birth to 18-24 months old. It involves being able to logically deduce the existence of an object from a series of events. In the later stages, people in this period can analyze one object or situation at a time. Many animals reach stage 5. A few reach stage 6. Dogs reach stage 6 but cats only reach stage 5. Continue reading