![Woodcock Johnson Standard Scores Chart Woodcock Johnson Standard Scores Chart](https://m4.healio.com/~/media/journals/jpos/2012/5_may/10_3928_01913913_20111101_03/table3.jpg)
As another example, an RPI of 60/90 means Sheila has a 60% chance of being successful on things her grade-level peers can complete with 90% success. For example, if Sheila has an RPI of 45/90, this means she has a 45% chance of success on tasks that her typical grade-level peers have a 90% chance of completing successfully. The RPI is the child's likelihood of being successful on tasks that her same-grade level peers have a 90% chance of being successful at. But to actually, directly answer the question of growth using nationally-normed tests, it helps to know about the W score and the RPI. You can also look at circumstantial evidence, such as the child displaying less frustration and anxiety when faced with academic tasks. There are also curriculum based measures, which will cover in another post. Well, there are informal methods, like teacher or tutor reports.
![Woodcock Johnson Standard Scores Chart Woodcock Johnson Standard Scores Chart](https://image.slidesharecdn.com/wj4ga-141207135916-conversion-gate01/95/the-wj-iv-measurement-of-auditory-processing-ga-13-638.jpg)
It's hard to answer these questions with Standard Scores (we'll go more into why later in this post). Did the child actually get worse with treatment? Or did she stay the same, or maybe even make some progress? More importantly, did she learn anything? Did she get any better at the skill we're measuring? For example, let's say you test a child who gets a WJ-IV Letter-Word Identification Standard Score of 89 at Time 1, and a Standard Score of 88 a year later at Time 2. These questions are difficult to answer with Standard Scores. Usually, parents and teachers want to know, "Did the student make gains over time? Did they respond well, adequately, or not at all to the intervention? Did they actually lose ground? Did they catch up with their peers?" When re-evaluating a student, we're often faced with a tricky situation: How do you effectively measure a student's growth?