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125 library activities A B C D E ABCDE aspects basis books read C D E Chapter chers classes in School Comparison Data F pupils data related earlier devices elementary schools elementary teachers face validity fathers Fict Girls Final Product final scale Four Sixth Grade Grade Classes Concerning Gray and Rogers habits and library high I.Q. higher I.Q. scores interest areas library backgrounds library service low I.Q. lower group lower quartile mean measure number of books occupation predictors present device present investigation present study present teacher previous teachers principal pupils in School questionnaire questions reading and library reading difficulty reading habits research field respondents Rutgers Study score on Data significantly high significantly low sixth grade classes standard deviation Stories Study of I960 Table teacher behavior teachers in School testing the hypothesis thirteen items three devices tion titles total number upper group validity and reliability voluntary reading