The following charts represent the percentile gains (converted from standard scores) made by our students on standardized tests. The median percentile is the 50th. Generally, the average range is from the 25th to the 63rd percentile. Research data from 2006 through October 2011 Sample Size: 166 Students Age Range 6-9 to 20-6 Males: 101 Females: 65 ______________________________________________________________ Word Reading & Spelling Progress  Average improvement on: Wide Range Achievement Test-3 and Wide Range Achievement Test-4 Sample Size: 153 Students ______________________________________________________________ Sight Word Recognition & Word Attack Progress  Average improvement on: Woodcock Reading Mastery Test, Revised NU Sample Size: 105 Students ______________________________________________________________ Reading Rate & Accuracy Progress  Average improvement on: Gray Oral Reading Test-Fourth Edition Sample Size: 157 Students Due to the severity of many of our students’ reading disabilities, they have not been exposed to enough words through reading prior to their treatment at Northwest Reading Clinic, Inc. Consequently, their reading rate takes much longer to improve. With strong reading accuracy skills and increased exposure to reading, we expect that reading rate will gradually continue to improve after students complete treatment. ______________________________________________________________ Reading Comprehension Progress  Average improvement on comprehension subtest on: Gray Oral Reading Test-Fourth Edition Sample Size: 163 Students All students are included in Reading Comprehension research sample regardless of programs received. ______________________________________________________________ Phonemic Awareness Improvement  Average gains in phonemic awareness as measured by: Lindamood Auditory Conceptualization Test-3© Sample Size: 147 Students ______________________________________________________________ Expressive Vocabulary Gains  Average improvement on: Expressive Vocabulary Test, First and Second Edition Sample Size: 53 Students ______________________________________________________________ Receptive Vocabulary Gains  Average improvement on: Peabody Picture Vocabulary Test, Fourth Edition Sample Size: 75 Students
 (includes English as a Second Language 
 students from lower socioeconomic 
 schools) ______________________________________________________________ Treatment Time: The average time in treatment is 120 to 160 hours. Some students attend for enhancement of their skills for 40 to 80 hours. Others return to the clinic for brief refreshers for several weeks or months. Individuals with severe disabilities may attend for a year of more. Sample Size: The sample size fluctuates on each graph based on the program or programs received. In addition, not all students receive all of the tests during their retesting. For instance, if a student has performed well on their initial diagnostic testing on a particular test, they are generally not tested again on this measure. This also impacts the number of students included in the graph data. Northwest Reading Clinic, Inc. is not Lindamood-Bell Learning Processes® nor is it affiliated with, certified, endorsed, licensed, monitored or sponsored by Lindamood-Bell®, Nanci Bell, Phyllis Lindamood or Pat Lindamood. Staff FAQ Research Programs Diagnostic Testing About Us Resources Home NEWS!