Technical Manual - Renaissance Learning

ValiditySTAR Early Literacy Enterprise Research Study ProceduresTable 35 presents the STAR Early Literacy Scaled Scores summary data by gradefor the US and Canadian samples separately.Table 35:Summary of Scaled Score Statistics, STAR Early Literacy Validation StudySample SizeScaled ScoreMeansScaled ScoreSDsScaled ScoreMediansGrade Level US Canada US Canada US Canada US CanadaPre-K 449 78 472 469 112 75 439 467K 1,982 325 588 570 103 107 585 5641 2,423 400 742 677 94 112 763 6882 1,769 371 796 782 79 77 816 8003 1,905 359 823 815 63 71 841 834More detailed score distribution data, including distributions of Domain and SkillScores as well as Scaled Scores, are presented in “Score Definitions” on page 110.Other results from the Validation Study, including reliability and validity data, arepresented in “Reliability and Measurement Precision” on page 44 and “Validity” onpage 55.STAR Early Literacy Enterprise Research Study ProceduresThe STAR Early Literacy Enterprise version was completed early in 2012, by theincorporation of the Enterprise assessment blueprint and the Enterprise version ofthe adaptive item bank into application software to administer and score theEnterprise assessments. That marked the first point at which it was possible toadminister computerized adaptive versions of the STAR Early Literacy Enterpriseedition. What remained at that point was to collect evidence of the newassessment’s reliability, its psychometric equivalence to the previous version ofSTAR Early Literacy, and its validity as a measure of early literacy. The evidence toaddress those issues was collected in a specially designed research study early in2012. The remainder of this section describes the research study itself, the datacollected, and the results of analyses of those data.STAR Early LiteracyTechnical Manual86