Boelen, P. A., Bout, J. van den, Keijser, J. de, & Hoijtink, H. (2003). Reliability and validity of the Dutch version of the Inventory of Traumatic Grief . Death Studies, 27, 227-247.
The psychometric properties of the Dutch version of the Inventory of Traumatic Grief (ITG) were investigated in two studies with bereaved adults who had suffered the loss of a first-degree relative. In Study 1, exploratory factor analysis indicated that the items of the ITG clustered together into one underlying factor. In addition, the internal consistency of the ITG and its short-term temporal stability were found to be high. In Study 2 it was found that the ITG exhibited adequate discriminative, concurrent, and construct validity. Furthermore, an ITG cutoff score for a diagnosis of traumatic grief was determined, with a sensitivity of 86% and a specificity of 76%, providing evidence in favor of the predictive validity of the ITG.