Translation, Cultural Adaptation, and Psychometric Validation of the European Portuguese Version of the Iceland-Expressive Family Functioning Questionnaire (ICE-EFFQ).
Maria do Carmo Lemos Vieira Gouveia, Eydis Kristin Sveinbjarnardottir, Maria João Barreira Rodrigues and 3 others
PMID 38041390WHAT IT FOUND
The Portuguese version of the family functioning questionnaire works well for the whole scale but splits into four different factors than the original.
Subscale reliability is weak, so total scores are trustworthy but individual domain scores are not.
Key findings
01The global scale showed good internal consistency (Cronbach's alpha = .86), but the four subscales had poor or weak reliability (alphas ranging from .61 to .79).
02Exploratory factor analysis confirmed a four-factor structure, but it differed from the original instrument: the 'behavior' factor was removed, and 'collaboration and problem-solving' split into two separate factors.
03Test-retest reliability was acceptable for the global scale (r = .75) but lower for subscales, ranging from .55 for expression of emotions to .66 for communication.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The sample was small (121 participants) and non-random, selected from specific health centers and psychiatric facilities in Madeira. The validity and reliability are established only for families dealing with depression; results cannot be extrapolated to other illnesses or cultural contexts. Subscale reliability was weak, limiting the utility of domain-specific scores. The study did not assess correlations between different subgroups (e.g., patients vs. family members, or gender differences).
Declared interests
The authors declared no potential conflicts of interest. Funding was provided by the Nursing Research, Innovation and Development Centre of Lisbon (CIDNUR), the European Science Foundation Research Networking Programme ‘REFLECTION’, and Fundação para a Ciência e a Tecnologia.
The easy way to misread this
Do not assume the Portuguese version measures the same four family domains as the original Icelandic tool. The factor structure changed significantly, and subscale reliability was too low to support clinical decision-making based on individual domain scores.