Behavioural Dysfunction Questionnaire (BDQ)

Description

The BDQ is a 50-item other-report questionnaire comprising five behavioural disorders, which are typical for the behavioural variant frontotemporal dementia (bvFTD). The questionnaire is based on the diagnostic criteria of Rascovsky et al. (2011)¹. The 50 items of the questionnaire are distributed across the five behavioural disorders as follows:

• Behavioural disinhibition (18 items)
• Apathy (4 items)
• Loss of empathy (8 items)
• Perseverative, stereotyped, or compulsive behaviour (16 items)
• Hyperorality/dietary changes (4 items)

Scoring

Each item is rated from “none” to “very often or very severe”.

The following scores can be calculated:

• Domain scores are mean scores of the items of each behavioural disorder
• The total score is the mean score of all domain scores

Administration

Paper-pencil format

Administration time

5-10 minutes

Languages

German, English, French, Italian, Spanish

More information about the BDQ can be found in Literature

1. Rascovsky, K., Hodges, J. R., Knopman, D., … Miller, B. L. (2011). Sensitivity of revised diagnostic criteria for the behavioural variant of frontotemporal dementia. Brain : a journal of neurology, 134(Pt 9), 2456–2477.https://doi.org/10.1093/brain/awr179