There are many studies of this type, but no more unified conclusion has been formed so far. Different experimental texts and experimental procedures have a great influence on the results.
There are many such studies, but so far no more uniform conclusions have been formed, and different experimental texts and experimental processes have great influence on the results.
There are a lot of researches on this kind of research, but there is no uniform conclusion so far. Different experimental texts and experimental processes have great influence on the results.<BR>