Janine Spencer
MRC Cognitive Development Unit,
4 Taviton Street,
London, WC1H 0BT
Abstract
Timing effects in categorisation were investigated in 4 experiments with
infants and adults. Experiments 1 and 2 utilised the familiarisation
/novelty preference procedure with 4-month old infants and showed that
when processing time is limited, infants attend more to highly salient
perceptual similarity relations when categorically distinguishing
between animal species. With longer looking time, however, categorisation
is determined by the more abstract properties of the stimuli. Experiments
3 and 4 showed that the processes that adults use in rapid categorisation
tasks correspond to those of infants. That is, in rapid categorisation adults also
also rely more on those properties which are the most perceptually salient,
whereas abstract properties are only processed when categorisation is
slower.