The Give-N Task for Assessing Child Number Knowledge

Children learn very early (often as young as 2 years old) to recite the number-word list in order (Fuson, 1988). But at the beginning, the words are merely placeholders—children recite the list without knowing what the individual number words mean. Over time, children fill in the words with meaning, one at a time and in order (Carey, 2009; Sarnecka & Lee, 2009). The child’s progress on this front is called their number-knower level, or just knower level. A child who does not yet know ...

 Collapse is a Recurrent Phenomenon in Societies

The Roman Empire's dramatic collapse (followed by many centuries of population decline, economic deterioration, intellectual regression, and the disappearance of literacy) is well known, but it was not the rst rise-and-collapse cycle in Europe. Prior to the rise of Classical Greco- Roman civilization, both the Minoan and Mycenaean Civilizations had each risen, reached very advanced levels of civilization, and then collapsed virtually completely [Morris, 2006; Redman, 1999]. The history of Mes...