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Origins of Mind : 07
4- to 6-month-olds can track briefly occluded objects
scenario | method | source |
1 vs 2 objects | habituation | Spelke et al 1995 |
one unperceived object constrains another’s movement | habituation | Baillargeon 1987 |
where did I hide it? | violation-of-expectations | Wilcox et al 1996 |
wide objects can’t disappear behind a narrow occluder | violation-of-expectations | Wang et al 2004 |
when and where will it reappear? | anticipatory looking | Rosander et al 2004 |
marker of object maintenanc | EEG | Kaufman et al 2005 |
How?
occlusion | endarkening | |
violation-of-expectations | ✔ | ✘ |
manual search | ✘ | ✔ |
Charles & Rivera (2009)
The CLSTX conjecture:
Five-month-olds’ abilities to track briefly unperceived objects
are not grounded on belief or knowledge:
instead
they are consequences of the operations of
a system of object indexes.
Leslie et al (1989); Scholl and Leslie (1999); Carey and Xu (2001)
... and of a further, independent capacity to track physical objects which involves motor representations and processes.
A Question:
What can object indexes explain?
occlusion | endarkening | |
violation-of-expectations | ✔ | ✘ |
manual search | ✘ | ✔ |
Charles & Rivera (2009)
Functions of object indexes:
✔ influence how attention is allocated
✔ guide ongoing actions (e.g. visual tracking, reaching)
✘ initiate purposive actions
Wynn 1992, fig 1 (part)
object index operations
↓
? ? ? metacognitive feelings
↓
patterns in looking durations
‘metacognitive feelings ... allow a transition from the implicit-automatic mode to the explicit-controlled mode of operation.’
Koriat, 2000 p. 150
Adapted from Sidarus & Haggard, 2016 figure 5
Adapted from Sidarus & Haggard, 2016 figure 5
Metacognitive feelings
There are aspects of the overall phenomenal character of experiences which their subjects take to be informative about things that are only distantly related (if at all) to the things that those experiences intentionally relate the subject to.
Metacognitive feelings
can be thought of as
sensations.
Sensations are
metacognitive feelings trigger beliefs only via associations.
metacognitive feelings
Thereare aspects of the overall phenomenal character of experiences which their subjects take to be informative about things that are only distantly related (if at all) to the things that those experiences intentionally relate the subject to.
Wynn 1992, fig 1 (part)
feeling of surprise
‘the intensity of felt surprise is [...] influenced by [...]
the degree of the event’s interference with ongoing mental activity’
Reisenzein et al, 2000 p. 271; cf. Touroutoglou & Efklides, 2010
object index operations
↓
? ? ? metacognitive feelings
↓
patterns in looking durations
Objection
If object index operations produce metacognitive feelings,
wouldn’t these generate knowledge about object locations?
(And so generate the incorrect predictions that flow from ascribing knowledge of object locations?)
object index operations
↓
? ? ? metacognitive feelings
↓
patterns in looking durations
conclusion
Q1 What is the nature of infants’ earliest cognition of physical objects?
‘there is a third type of conceptual structure,
dubbed “core knowledge” ...
that differs systematically from both
sensory/perceptual representation[s] ... and ... knowledge.’
Carey, 2009 p. 10
Crude Picture of the Mind
‘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)
What is in between:
object indexes
motor representations
metacognitive feelings
...
Q2 How do you get from these early forms of cognition to knowledge of simple facts about particular physical objects?
The Assumption of Representational Connections
The transition involves operations on the contents of representations, which transform them into (components of) the contents of knowledge states.
Conjecture
‘metacognitive feelings ... allow a transition from the implicit-automatic mode to the explicit-controlled mode of operation.’
Koriat, 2000 p. 150
synchronic
diachronic
object index operations
↓
metacognitive feelings
↓
patterns in looking durations
object indexes + metacognitive feelings
↓
? ? ?
↓
knowledge of objects
Development is (re)discovery.