Adaptation and validation of the European Portuguese Communication and Symbolic Behaviour Scales Developmental Profile™ (CSBS DP™) Infant-Toddler Checklist.
Marisa G Filipe, Cátia Severino, Marina Vigário and 1 others
PMID 37528522WHAT IT FOUND
The European Portuguese version of the Infant-Toddler Checklist is a reliable screening tool for early communication.
Scores for Portuguese toddlers matched American peers on almost all measures, confirming the tool's validity for use in Portugal.
Key findings
01Internal consistency for the adapted checklist was excellent for the total score and good for the three composites.
02Test-retest reliability remained strong across intervals up to 90 days, with correlations between 0.84 and 0.98.
03European Portuguese toddlers' scores matched the US standardization sample on almost all measures, with only two minor differences observed.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The sample was recruited primarily from the Lisbon Metropolitan Area, which may not represent rural Portugal or the islands. Participants skewed towards higher education and socioeconomic status, potentially limiting generalizability to lower-income families. Most children attended childcare centers, which may differ from care arrangements in other regions. The study validated the checklist's reliability and norms but did not test its diagnostic accuracy against a clinical gold standard in this specific population.
Declared interests
The authors declared no conflicts of interest. The study was funded by the Portuguese Foundation for Science and Technology and European Regional Development Fund.
The easy way to misread this
Do not assume this tool is equally valid for all Portuguese families. The norms were derived from an urban, higher-education sample in Lisbon, so scores for children in rural areas or from families with lower educational backgrounds may not be comparable.