Speech and language development
There seems to be some link between the way in which a child develops speech and language which is important. This may either be that a child is quicker or slower than his age group, or that there were some earlier, sometimes quite subtle, difficulties
There may still be some minor, often unrecognised, difficulties. An example would be in ‘word retrieval’ or ‘word finding’ – here the filing system for vocabulary is not very efficient. It’s the ‘tip of the tongue’ phenomenon! The person knows exactly what they want to say but the exact word they want to use escapes them for a second or two
The person’s instinctive or natural rate of talking also may be influential