Technical Manual - Renaissance Learning

ValidityPost-Publication Study DataTable 28:Validity Coefficients a of STAR Early Literacy with Itself at Later Time Pointsand with STAR Reading over a Two-Year Period for all Cohort GroupsCombined and SeparatelyGrade LevelGroupAdministrationTimeSTAR Early Literacy bSTAR Reading cWinter Spring Fall Corrected dTotal Sample Fall r e 0.75 0.69 0.64 0.71N f 1,265 1,382 1,740Winter r – 0.78 0.67 0.76N – 2,022 2,182Spring r – – 0.70 0.79N – – 2,810K to 2nd Fall r 0.52 0.50 0.47 0.56N 511 543 572Winter r – 0.64 0.57 0.70N – 922 880Spring r – – 0.59 0.73N – – 1,0951st to 3rd Fall r 0.66 0.56 0.54 0.67N 600 663 811Winter r – 0.68 0.62 0.76N – 881 1,012Spring r – – 0.66 0.78N – – 1,2552nd to 4th Fall r 0.56 0.58 0.51 0.61N 154 176 357Winter r – 0.75 0.55 0.64N – 219 290Spring r – – 0.58 0.68N – – 460a. All coefficients are statistically significant (p < 0.001).b. STAR Early Literacy Enterprise scores were taken within the same school year.c. STAR Reading was taken two-years after the fall administration of STAR Early Literacy.d. Corrected for measurement error.e. “r” indicates the validity coefficient rounded to two decimal places.f. “N” indicates the number of students used to calculate the validity coefficient.In summary, the data displayed in Tables 27 and 28 of this section provide supportfrom a substantial longitudinal study, for both the validity of STAR Early Literacyas a measure of developing skills, and for its long-term validity for predicting laterreading achievement.STAR Early LiteracyTechnical Manual76