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- Wed Sep 28, 2011 6:44 am UTC
- Forum: Individual XKCD Comic Threads
- Topic: 0957: "Development"
- Replies: 87
- Views: 23850
Definitely American Psychological, Jean Piaget has a scale of levels of development. The scale for infants (miss you ap psych) had a fifth level which involves trying new things with objects and the environment, not sure if he's referencing that or just the scale in general (as there are 4 main leve...