Short forms of Prudhoe Cognitive Function Test in adults and aging people with intellectual disabilities: Italian validation study.
The Italian s-PCFT-I is a fast, reliable cognitive screener you can slot into your ID assessment battery today.
01Research in Context
What this study did
de Korte et al. (2021) checked if a 10-minute Italian short form of the Prudhoe Cognitive Function Test works for adults with intellectual disability. They looked at internal consistency, test-retest reliability, and how well scores line up with other cognitive tests.
The study focused on aging clients with ID who speak Italian. The goal was a quick screener clinicians can give in everyday settings.
What they found
The Italian s-PCFT-I showed good internal consistency and test-retest reliability. Scores also matched well with longer cognitive tests, meaning the short form gives similar answers.
Overall, the tool met standard psychometric benchmarks for a cognitive screener in this population.
How this fits with other research
Poppes et al. (2010) already showed that short and long PCFT forms are interchangeable in English speakers with ID. The 2021 study extends that work by confirming the same holds true in Italian, adding cross-language evidence.
Katz et al. (2003) found near-perfect inter-rater reliability for the original PCFT in adults with Down syndrome. The new short form keeps that strength while cutting test time to one-third, a practical upgrade for busy clinics.
Wilkinson et al. (1998) warned that the Short IQCODE had weak reliability in elderly clients with ID, leaving clinicians unsure. The s-PCFT-I now offers a brief alternative with solid psychometrics, filling the gap the IQCODE left open.
Why it matters
You now have a 10-minute, Italian-language cognitive screener you can trust for adults and older adults with ID. Use it during intake, annual reviews, or whenever you need a quick cognitive snapshot before starting skill-building programs. Pair it with the 17-item ID-FI Short Form (D et al., 2022) to add frailty data without much extra time.
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02At a glance
03Original abstract
BACKGROUND: We aimed to validate the Italian version of the two parallel short forms of the Prudhoe Cognitive Function Test (s-PCFT-I) in adults and seniors with intellectual disabilities (ID) of any aetiology and level of severity. METHODS: Our validation is a multicentre study attended by 211 subjects with ID, 125 male and 86 female, aged 40 years and above for people with Down syndrome and aged 50 years for people with other forms of disabilities. RESULTS: The s-PCFT-I shows a wide range of scores in the absence of floor effects with minimal ceiling effects. A Cronbach's α coefficient of 0.85 and a mean inter-item correlation of 0.21 indicate high internal consistency. The tool demonstrates good agreement between testers and near excellent temporal stability with intraclass correlation coefficients respectively of 0.85 and 0.90. s-PCFT-I total scores do not differ by sex or age, while statistically significant differences are observed between people with different levels of severity of ID. Moderate to good and highly significant correlations (-0.40 to -0.66) among the s-PCFT-I total scores and subscores and the Sum of Cognitive Score of the informant-based Dementia Questionnaire for Persons with Intellectual Disabilities suggest an acceptable level of concurrent criterion validity. Cognitive decliners according to Prasher's Dementia Questionnaire for Persons with Intellectual Disabilities cut-off scores perform significantly lower on s-PCFT-I than non-decliners. CONCLUSIONS: The s-PCFT-I has good psychometric properties and user friendliness and may therefore be a valuable addition to the current informant-rated tools for screening and assessment of cognition in aging people with ID.
Journal of intellectual disability research : JIDR, 2021 · doi:10.1111/jir.12799