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The CLSTX conjecture:
The principles of object perception
are not things believed or known:
they characterise the operation of
Leslie et al (1989); Scholl and Leslie (1999); Carey and Xu (2001)
‘if you want to describe what is going on in the head of the child when it has a few words which it utters in appropriate situations, you will fail for lack of the right sort of words of your own.
‘We have many vocabularies for describing nature when we regard it as mindless, and we have a mentalistic vocabulary for describing thought and intentional action; what we lack is a way of describing what is in between’
(Davidson 1999, p. 11)
The Core Knowledge View?
‘Just as humans are endowed with multiple, specialized perceptual systems, so we are endowed with multiple systems for representing and reasoning about entities of different kinds.’
Carey and Spelke, 1996 p. 517
‘core systems are
(Carey and Spelke 1996: 520)
The Core Knowledge View
Infants, like most adults, do not know the principles of object perception; but they have core knowledege of them.
The CLSTX conjecture
The principles of object perception characterise how a system of object indexes should work.
Infants’ (and adults’) object indexes track objects through occlusion.
Five-month-olds do not know the location of an occluded object.
Five-month-olds do have perceptual expectations concerning its location.
Next Big Problem
Core Knowledge Isn’t Knowledge
... so how can we explain the developmental origins of knowledge?