Neuropsychological test battery in the follow-up of patients with juvenile neuronal ceroid lipofuscinosis.
An adapted NEPSY battery can chart steady cognitive loss in blind JNCL patients, but today’s teams should also weigh Vineland-3 to avoid floor effects.
01Research in Context
What this study did
Doctors followed kids with juvenile neuronal ceroid lipofuscinosis for five years.
They gave an adapted NEPSY battery that works for children who are almost blind.
The team wanted to see if the test could track slow loss of thinking skills.
What they found
Every child except one lost verbal IQ points year after year.
The same drop showed up in time-orientation and naming tasks.
The short battery caught the slide, even with vision problems in the room.
How this fits with other research
Thurm et al. (2020) warn that regular IQ tests often miss real change in ID.
Roane et al. (2001) proves one fix: tweak the tool for the sensory loss.
Halladay (2025) tells us to swap to Vineland-3 to dodge floor effects.
The JNCL study did not use Vineland, so today you might pick that instead.
Why it matters
If you assess youth with rare neuro-degenerative disorders, borrow the tweak idea.
Swap vision-heavy items for verbal or touch ones, then re-norm on your caseload.
Track the same child every six months; small drops guide goals and family talks.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Pull your current cognitive tool, list every vision item, and write a verbal or tactile replacement so you can keep tracking if sight fades.
02At a glance
03Original abstract
The aim of the present study was to develop a neuropsychological test battery for patients with juvenile neuronal ceroid lipofuscinosis (JNCL) and to study the development of cognitive functions during the first 5 years after diagnosis. Fourteen patients with JNCL entered the study. Nine patients were homozygous for the major mutation, whereas five were compound heterozygotes. All patients were studied annually with a special neuropsychological test battery (NEPSY) adapted from Luria's neuropsychological test, and modified for the visually handicapped; the Wechsler Intelligence Scale for Children - Revised (WISC-R) was also included. The neurological examinations were scored. Furthermore, 1.OT magnetic resonance imaging scan was performed at the beginning of follow-up and after a mean of 5 years. A decline in verbal IQ (WISC-R) during the follow-up period was found in all subjects except one compound heterozygous male. Short-term memory and digit memory span were already impaired at an early stage of the disease. Orientation to time was found to decline more than orientation to person and place. Motor speed usually became impaired after 10 years of age. Spatial orientation was impaired only in the patients homozygous for the major mutation. The test battery was found to be reliable and easy to use, and offered valuable information on the progress of the disease. It also provided important guidelines for rehabilitation.
Journal of intellectual disability research : JIDR, 2001 · doi:10.1046/j.1365-2788.2001.00288.x