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This paper reports two experiments which examined processes involved in children's ability to solve class inclusion problems of the form, "Are there more A' (subclass) or more A (class)?" In the first experiment a total of 216 children in age groups 5, 7 and 9 years were placed in three conditions which were designed to distinguish performance on single and double class inclusion problems (involving implicit and explicit partitioning) and to examine subsequent transfer of experience with the double class display procedure when the child returned to the traditional one-class setting. Findings support the position that certain perceptual contexts are more likely to induce the child to perceive the class rather than merely the subclasses. Overall transfer results also showed improvement but gave no significant effects for explicit compared with implicit partioning of the double class display. Experiment 2 placed into two conditions a total of 120 children in age groups 5, 7 and 9 years, each condition comprising three consecutive tests designed to test the effect of intervening double class problems on Test 2 performance and on Test 3 transfer effects. Anticipated improvements were demonstrated. Comparison of data from each experiment suggests that class inclusion is not what is at issue in part-whole comparisons. A general process description of what occurs in class inclusion problems is offered. (GO)

1Boy Crusoe

By Allan Eric

Also published as" A Yankee Crusoe" . A 15 year old hard working and studious farm boy finds the lure of adventure on the seas as a merchant seaman more than he can resist. This is his story. " I was born in a little town in the State of Maine, near the close of the Civil War. My boyhood life did not differ materially from that of the average farmer's son in the remote country districts of New England--except, perhaps, that I read more and thought more. Hard work on the rugged soil, two terms each year in the little yellow country schoolhouse, a day's fishing now and then filled the early years of my life full to over-flowing. " What he gets is enough excitement and adventure to overflow his wildest dreams. How he experiences disaster and uses his wits and knowledge to overcome every problem makes for a great read. - Summary by Phil Chenevert