Istation’s reading curriculum and assessments are based on data from scientific and independent research studies that have proven Istation's effectiveness in elevating reading fluency and the product's applicability to the classroom.
Predictability Study of ISIP Reading and STAAR Reading: Prediction Bands
Predictability Study of ISIP Reading and STAAR Reading: Prediction Bands (318KB) March 2014
This study provides evidence of the ability of ISIP Reading cut scores to predict passing the of STAAR across grades 3-8. Predictability bands were computed to obtain ISIP cut scores to predict passing STAAR. Data from 20,493 students was collected from the Garland Independent School District, in Garland, TX. ISIP Early Reading and ISIP Advanced Reading overall reading scores and STAAR Reading scores from the 2012-2013 school year were compared.
ISIP Reading versus STAAR Reading: The Predictability Study
ISIP Reading versus STAAR Reading: The Predictability Study (2MB) January 2014
This study provides measurable evidence that the ISIP Reading measures are predictive of STAAR Reading scores across grades 3 - 8. It indicates the ISIP tests can be used as a prediction of how a student will score on STAAR. Data from 20,493 students was collected from the Garland Independent School District, in Garland, TX. ISIP Early Reading and ISIP Advanced Reading overall reading scores and STAAR Reading scores from the 2012-2013 school year were compared.
Report of Istation 2009 Second Grade - 2010 Third Grade Users (244KB) October 2011
This is an independent report from Hillsborough County Public Schools in Florida. A two-year study reported ISIP correlates strongly with the Stanford Achievement Test-10 and the Florida Comprehensive Assessment Test (FCAT 2.0).
ISIP™, Istation’s Indicators of Progress, Early Reading Validity and Reliability Evidence for Pre-Kindergarten
ISIP Validity and Reliability Research Report for Pre-K (201KB) March 15, 2010
During the 2009–10 school year, a study using ISIP, Istation’s Indicators of Progress, Early Reading assessment program was conducted in eleven pre-kindergarten classes from a large North Texas school district. Data were examined for concurrent validity with external measures, as well as internal consistency and test-retest reliability. Results show large to very large evidence of reliability and validity with regard to letter knowledge, vocabulary, phonemic awareness, and comprehensive reading ability for students in pre-kindergarten.
ISIP™ Early Reading Reliability and Validity Evidence
ISIP Early Reading Reliability and Validity Evidence (289KB) August 21, 2009
During the 2008–09 school year, a validity and reliability study using ISIP, Istation’s Indicators of Progress computer-adaptive reading assessment program, was conducted in five elementary schools from a North Texas school district. Data were examined for internal consistency, test‐retest reliability, concurrent validity with external measures, including DIBELS, TPRI, AND ITBS, and predictive validity with TAKS. Results show moderate to strong evidence of reliability and validity with regard to phonemic awareness, alphabetic knowledge, vocabulary, and reading comprehension.
ISIP™ Concurrent and Predictive Validity Study
ISIP Concurrent and Predictive Validity Study (291KB) April 16, 2007
In this study, concurrent validity information was gathered on ISIP (Istation's Indicators of Progress) kindergarten, first, second, and third grade benchmark assessments compared to Dynamic Indicators of Basic Early Literacy Skills kindergarten, first, second, and third grade benchmark assessments (DIBELS, Good, Kaminski, & Dill, 2002). Further, predictive validity information was gathered on ISIP third grade benchmarks compared to the Texas Assessment of Knowledge and Skills (TAKS) at third grade.
These white papers detail the scientifically based methods that build the foundation of Istation's products.
Predicting Student Performance on the Developmental Reading Assessment, 2nd Edition: An Independent Comparison of Two Different Tests
(1.4MB), March 2012
Results from an independent study using data gathered from K–5th grade students from the 2010–2011 school year in a large suburban district in Texas show (1) Istation's reading assessment, Istation's Indicators of Progress (ISIP), was moderately to highly correlated with the DRA2 and (2) Istation's ISIP was more highly correlated with the DRA2 than the Measures of Academic Progress (MAP) reading assessment was.
The effectiveness of Istation in a school: East Baton Rouge Parish School System (714KB), November 2011
This study describes the effects of using Istation in a single school. It compares performance at the beginning of the school year on EduSoft for English language arts with performance at the end of the school year on the same assessment for 1st through 5th grades. The results show a very dramatic increase in student performance at all levels, especially in 1st and 2nd grades.
English Language Learners and Istation's Reading Curriculum (101KB), August 2010
Correlation Paradox (8KB), September 2009
Early Intervening Services and Response to Intervention (140KB), December 2006
Research-Based Preschool Early Literacy Curriculum (40KB), August 2006
Supplemental Educational Services (216KB), August 2006
Istation's Supplemental Reading and Intervention Program (117KB), July 2004
ISIP Español Technical Report (916KB), January 2012
Validity Studies for ISIP Español Assessment
ISIP Advanced Reading Technical Report (8KB), January 2012
Validity Studies for ISIP Advanced Reading Assessment
ISIP Early Reading Technical Report (6.3MB), 2011
Validity Studies for ISIP Early Reading Assessment
Studies are in PDF format. To read, please be sure to have Adobe Reader on your computer.