Evaluating Scoring Mechanisms for Measuring the Stroop Effect in Individuals With Down Syndrome.
E Denne, D Fidler, S Wiley and 2 others
PMID 42396886WHAT IT FOUND
Scoring the Cat/Dog Stroop task by dividing correct responses by completion time was the only method that worked well for both children and adults with Down syndrome.
Most existing studies used accuracy alone, which produced skewed data and made comparisons between papers difficult.
Key findings
01The most common scoring method, accuracy alone, produced data that did not follow a normal distribution for children, adults, or the combined sample.
02A combined score using both accuracy and time was the only mechanism that met statistical criteria for normality in children and was recommended for adults as well.
03No single scoring mechanism was statistically appropriate for samples that included both children and adults together.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The adult sample was small (31 participants) and restricted to ages 18–29, so findings do not apply to older adults with Down syndrome or those experiencing cognitive decline. The task requires verbal responses, meaning performance can be confounded by expressive language and speech difficulties rather than just cognitive control. The study did not test scoring mechanisms for patients using sign language or augmentative and alternative communication (AAC) devices. The sample was primarily White and non-Hispanic (87%), which may limit generalizability to other cultural or linguistic backgrounds.
Declared interests
The authors declared no conflicts of interest. The work was funded by the Eunice Kennedy Shriver National Institute of Child Health and Human Development and Fondation Jérôme Lejeune.
The easy way to misread this
Do not assume that a high accuracy score indicates strong cognitive control. The study found that accuracy alone produced invalid statistical distributions, and a patient may achieve high accuracy simply by responding very slowly. You must account for time to get a meaningful measure of inhibitory control.