Therefore , if a CP exists , it does not coincide with lateralisation .
Other work has challenged the biological approach ; Krashen ( 1975 ) re-analysed clinical data used as evidence and concluded cerebral specialisation occurs much earlier than Lenneberg calculated .
If a CP exists , it does not coincide with lateralisation .
Other work has challenged the biological approach ; Krashen ( 1975 ) re-analysed clinical data used as evidence and concluded cerebral specialisation occurs much earlier than Lenneberg calculated .