Dutch Infants’ Sensitivity to Lexical Pitch-Accent: A Behavioural Discrimination Task Pilot

This thesis covers a pilot study that examines whether Dutch infants can distinguish lexical tonal patterns in pseudowords. It is inspired by Sato et al.’s 'Development of Hemispheric Specialization for Lexical Pitch–Accent in Japanese Infants' (2010). Sato et al. found that Japanese infants can distinguish lexical tonal patterns in Japanese disyllabic words, and that they start processing these stimuli mostly in the left hemisphere (rather than bilaterally) as they get older in their first year of life, suggesting that Japanese infants perceive lexical pitch-accent as a lexical acoustic cue. Since Dutch does not use pitch-accent as a lexical cue, we would not expect Dutch infants to start processing tonal patterns in the left hemisphere as they get older within their first year. The first step to examining this expectation is carrying out a behavioural discrimination task to establish whether Dutch infants can distinguish lexical tonal patterns in pseudowords in the first place....Show moreThis thesis covers a pilot study that examines whether Dutch infants can distinguish lexical tonal patterns in pseudowords. It is inspired by Sato et al.’s 'Development of Hemispheric Specialization for Lexical Pitch–Accent in Japanese Infants' (2010). Sato et al. found that Japanese infants can distinguish lexical tonal patterns in Japanese disyllabic words, and that they start processing these stimuli mostly in the left hemisphere (rather than bilaterally) as they get older in their first year of life, suggesting that Japanese infants perceive lexical pitch-accent as a lexical acoustic cue. Since Dutch does not use pitch-accent as a lexical cue, we would not expect Dutch infants to start processing tonal patterns in the left hemisphere as they get older within their first year. The first step to examining this expectation is carrying out a behavioural discrimination task to establish whether Dutch infants can distinguish lexical tonal patterns in pseudowords in the first place. Only then does it become fruitful to carry out a NIRS experiment like Sato et al. to investigate in what parts of the brain Dutch infants process lexical tonal patterns, and whether this differs as they get older. We found that Dutch infants do seem to be able to distinguish lexical tonal patterns in pseudowords. Though the sample size of this pilot is small, the effect that we found is of such significance that we expect to find it in the larger sample size of the official study as well, showing that Dutch infants can distinguish words on the basis of their tonal pattern. We therefore expect that performing a NIRS study like Sato et al. (2010) will be feasible.Show less

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Dutch Infants’ Sensitivity to Lexical Pitch-Accent: A Behavioural Discrimination Task Pilot