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 2009
 
 
  1. ‣Sample Size: 82 Students
  2. ‣Age Range 6-9 to 16-0
  3. ‣Males: 49
  4. ‣Females: 33
  5. ______________________________________________________
  6.  
  7. Word Reading and Spelling Progress
  8.  
  9.  
  10. ‣Average improvement on:
  11.   Wide Range Achievement Test-3 and      
  12.   Wide Range Achievement Test-4
  13. ‣Sample Size: 73 Students
  14.  
  15.  
  16.  
  17.  
  18. ______________________________________________________
  19.  
  20. Sight Word Recognition and Word Attack Progress
  21.  
  22.  
  23. ‣Average improvement on:
  24.   Woodcock Reading Mastery Test,
  25.   Revised NU      
  26. ‣Sample Size: 25 Students
  27.  
  28.  
  29.  
  30. ______________________________________________________
  31.  
  32. Reading Rate and Accuracy Progress
  33.  
  34.  
  35. ‣Average improvement on:
  36.   Gray Oral Reading Test-Fourth Edition  
  37. ‣Sample Size: 73 Students
  38.  
  39.  
  40.  
  41.  
  42.  
  43.  
  44. 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.
  45. ______________________________________________________
  46.  
  47. Reading Comprehension Progress
  48.  
  49.  
  50. ‣Average improvement on
  51.   comprehension subtest on:
  52.   Gray Oral Reading Test-Fourth Edition  
  53. ‣Sample Size: 79 Students
  54.  
  55.  
  56.  
  57.  
  58.  
  59. All students are included in Reading Comprehension research sample regardless of programs received.
  60. ______________________________________________________
  61.  
  62. Phonemic Awareness Improvement
  63.  
  64.  
  65. ‣Average gains in phonemic  
  66.   awareness as measured by:
  67.   Lindamood Auditory Conceptualization  
  68.   Test-3©  
  69. ‣Sample Size: 68 Students
  70.  
  71. ______________________________________________________
  72.  
  73. Expressive Vocabulary Gains
  74.  
  75.  
  76. ‣Average improvement on:
  77.   Expressive Vocabulary Test,
  78.   First and Second Edition  
  79. ‣Sample Size: 39 Students
  80.  
  81.  
  82.  
  83.  
  84. ______________________________________________________
  85.  
  86. Receptive Vocabulary Gains
  87.  
  88.  
  89. ‣Average improvement on:
  90.   Peabody Picture Vocabulary Test,
  91.   Fourth Edition  
  92. ‣Sample Size: 21 Students
  93.  
  94.  
  95.  
  96.  
  97. ______________________________________________________
 
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. For the purposes of this research, students that attend beyond 220 hours or less that 100 hours were not included in the data since they do not represent the norm.
 
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.
 
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