Electrophysiological Evidence for Sentence Comprehension - Wings

the ‘case-chi’ experiment and the later latencies of P600 were obtained, as well. In short,
hypotheses 2.1.1 and 2.1.2 cannot be confirmed.
Generally, differences between TLD and SLI groups were obtained. However, as the
results were somewhat surprising for the TLD group, actual shift in latency for LAN in
‘case-chi’ experiment cannot be confirmed due to the fact that LAN was not obtained at
all in both groups. However, later latencies of P600 in the SLI group were recorded. The
same reasoning should be applied for the results in ‘tense-chi’ experiment: later latencies
of P600 were indeed obtained, but the late negative deflection was not predicted at all in
the first place. Therefore, the hypotheses 2.2.1 and 2.2.2 can be only partially confirmed.
The hypothesis 2.3 predicted the ‘global’ processing deficit in the SLI group, not the
deficit on a particular area of grammatical knowledge. Therefore, the hypothesis would
have been falsified if the results of SLI children were similar to TLD children in only one
experiment. This is not the case: the differences were obtained in both experiments. In
addition, the differences between the experiments in the SLI group indicate that the
dissociation of the grammatical functions, as observed in adults and – to some extent
TLD children – was not obtained in the SLI group. This means that the hypothesis 2.3
can be fully confirmed.
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