What is berry phase?

Famous quotes containing the words berry and/or phase:

    Grandparents who want to be truly helpful will do well to keep their mouths shut and their opinions to themselves until these are requested.
    —T. Berry Brazelton (20th century)

    It no longer makes sense to speak of “feeding problems” or “sleep problems” or “negative behavior” is if they were distinct categories, but to speak of “problems of development” and to search for the meaning of feeding and sleep disturbances or behavior disorders in the developmental phase which has produced them.
    Selma H. Fraiberg (20th century)