Abstract
Ziel der vorliegenden Arbeit ist die psychometrische Überprüfung der 14-Item Version des Freiburger Fragebogens zur Achtsamkeit auf der Grundlage der Rasch-Analyse. Da sowohl eine ein- (Achtsamkeit als Generalfaktor) als auch zweifaktorielle Lösung (Achtsamkeit zusammengesetzt aus Präsenz und Akzeptanz) für den FFA-14 vorgeschlagen wurde, werden in dieser Studie die psychometrischen Kennwerte für beide Lösungen auf der Grundlage des Ratingskalenmodell (RSM) verglichen. Die psychometrische Analyse belegte mit Ausnahme eines Items die psychometrische Qualität des Instruments und zeigte die Überlegenheit der zweifaktoriellen Lösung auf. Jedoch waren auch Boden- und Deckeneffekte nachzuweisen, die die Messung bei Probanden mit sehr hohen bzw. niedrigen Achtsamkeitsausprägungen eventuell verzerren könnten.
This study examines the psychometric properties of the 14 item short form of the Freiburg Mindfulness Inventory (FMI) employing Rasch modelling. As both a once-factorial (mindfulness as a generic construct) and a two-factorial solution (mindfulness comprised of the two subcomponents presence and acceptance) have been suggested, this study compares the psychometric properties of both models. Results corroborated the psychometric qualities of the instrument with the exception of one item and suggest that the two-factor solution is more desirable from a psychometric point of view. However, there is evidence for bottom and ceiling effects that may blur measurement in individuals extremely high and low in mindfulness.
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