The ability to subfractionate minor cellular subsets by multiparameter flow cytometry and to evaluate such cells for functional properties has been used to ascertain lineal relationships and detail developmental hierarchies in the hematopoietic system for more than 20 years. However, steady advances in technology combined with the use of novel cell surface markers continues to redefine the deve...

stage statements In abstract-stage statements, individuals often quantified their emotions following a loss. Although abstract-stage statements were often relatively short, the statements differed from primaryor concrete-stage statements because they contained some kind of recognition that the reaction to an event could have been different or could be variable under different circumstances. (F,...

The spelling of many words in English and in other orthographies involves patterns determined by morphology (e.g., ed in past regular verbs). The authors report a longitudinal study that shows that when children first adopt such spelling patterns, they do so with little regard for their morphological basis. They generalize the patterns to grammatically inappropriate words (e.g., sofed for soft)...