It is quite evident that not much can be said in less than one page, yet eleven authors restrict themselves that way, and seventeen more just give a summary of about two pages. The difference in lengtlh of the contributions - between half a page and 28 pages reflects the difference in quality. Some 62 authors, listed alpha Rule learning (like Abbot-Fe1 Schlesinger and Stewart), Feldman-Barton, by talk (Ervin-Tripp, Harkness, I I ), has to be termed outdated in 1978. Value as “a survey of thereof, although this volume retains its histori research during the first years of the ninet n-seventies ” (p.
