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DDF Differential Depression Questionnaire

P. Steck


Assesses the level of depressive symptoms.
The self-assessment tool DDF is used mainly for differential assessment of various aspects of depressive mood. The depressive syndrome is assessed in this questionnaire by six subscales, which can also be administered independently of each other. Because of this detailed analysis of subjective experience, this test is used in clinical neuropsychology.


Respondents provide information on whether they experience various physical and mental complaints. The previous answer can be corrected.

Test forms

S1: Full form
S2: Form A – short form
S3: Form B – parallel form of form A


The following main variables are scored, depending on the test form:

  • Phobic: Measure of fear of failure, phobic avoidance reactions and abnormal physical sensations within the depressive syndrome.
  • Somatized: The level of pain sensations – frequently associated with dizziness and unsteady gait – in the head, neck or back.
  • Hypochondriac: The levels of thoughts and worries about physical illness.
  • Self-tormenting: Measure of the extent to which the respondent is governed by feelings of guilt or self-reproach. The items address the person’s sense of injustice and inferiority.
  • Paranoid: Measure of mistrust of others and thoughts of being harmed by others.

In Form S1 also:

  • Anancastic: Measure of obsessive thought processes, control or counting compulsions and exaggerated, paralyzing precision or orderliness.

Scoring elements

Working time
Confidence interval
Profile analysis
Test protocol
Item analysis protocol
Progress chart
Special diagrammatic representation of results
Personalized Word report
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Test type

Clinical Tests

Test information

language-free item material
parallel test form
conforms to the Rasch-model
additional device required
high level of test security
wide norm spectrum
test form available for online presentation - open mode
links to CogniPlus
supervisor-supported testing




approx. 5-10 minutes, depending on test form


Norms for ages 17+ (clinical convenience sample).