Evans, V. C., Berthiaume, V. G.,
Shultz, T. R. (May, 2010). Toddlers' transitions on a false-belief task
involving an unexpected location: A constructive connectionist model. Development 2010,
Some argue that children develop a Theory of Mind (ToM), the understanding that others have mental
representations, at four years. This is evidenced by children's newfound
success at verbal false-belief tasks, in which they verbally predict a person
will search for a toy where she falsely believes it to be, rather than its
actual location. However, using
anticipatory looking as a non-verbal measure, Southgate et al. (2007) showed
25-month-olds correctly anticipated an actress, who missed a toy being moved
from a box to somewhere offstage, would search according to her false
belief. To investigate toddlers' success
at this task, we built a Sibling-Descendant Cascade-Correlation neural-network
model, following Berthiaume et al.'s (2008) model of a simpler non-verbal
false-belief task. Training included
true- and false-belief searches in four locations, simulating toddlers'
everyday experience with true- and false-beliefs. Testing included the original
four locations plus a fifth, novel location, mimicking testing on the
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