Characterization of potential outcome measures for future clinical trials in fragile X syndrome.

Berry-Kravis et al. (2008) asked which paper-and-pencil memory and thinking tests stay steady in people with fragile X. They gave the same tests twice, a few weeks apart, to a small group. Then they checked if each test gave the same score both times.

Four tests held up well. List and Story Memory from the RBANS, the NEPSY Tower, W-J Spatial Relations, and CPT commission errors all scored between 0.7 and 0.9 on the reliability scale. That range means the tests are solid enough to track small changes in short drug or behavior studies.

Falcomata et al. (2012) built on this work by adding a 15-minute computer game that also gives a stable learning-rate score. The new tool is faster and auto-records data, but it aims for the same goal: a trusty endpoint for fragile X trials.

Berry-Kravis (2022) folds both papers into a bigger plan. The review says the field will keep the 2008 paper tests while also using the 2012 digital task. Together they give teams a mix of classic and tech options.

Mulder et al. (2020) pushes the idea further. They argue we should stop looking at norm tables and start tracking each person’s own ability line. This method could make the 2008 tests even better at spotting true change.

If you run or join a fragile X study, you now have a short list of proven cognitive endpoints. You can pick from paper tasks, add the quick computer test, or mix both. Using tools with known reliability keeps your data clean and your trial short, saving time for you and the families you serve.