Persistent Depressive Disorder Technology & Digital Applications 3 — Questions and Answers
Question 1: A patient with PDD reports that using a light therapy lamp for 30 minutes each morning has improved their mood. Which neurobiological mechanism explains this benefit?
- Infrared heat warms the muscles and reduces tension
- Bright light suppresses melatonin and resets circadian rhythms (Correct answer)
- The lamp provides a placebo effect through expectation
- Blue light stimulates dopamine release in the skin
Correct answer: Bright light suppresses melatonin and resets circadian rhythms
Bright light therapy suppresses melatonin production and resets disrupted circadian rhythms, which are commonly dysregulated in PDD.
Question 2: Which practice is recommended when integrating a mental health app into formal PDD treatment?
- Using the app as a complete replacement for therapy once symptoms stabilize
- Selecting apps validated by clinical research or professional organizations (Correct answer)
- Choosing apps with the highest number of downloads as a quality proxy
- Avoiding apps that track mood data to protect patient privacy
Correct answer: Selecting apps validated by clinical research or professional organizations
Clinicians should recommend apps with evidence of clinical validation to ensure they provide safe, effective support for PDD.
Question 3: A person with PDD sets a digital 'screen time limit' on social media apps. This strategy most directly addresses which symptom?
- Sleep disturbance caused by blue light exposure
- Ruminative negative thinking amplified by passive scrolling (Correct answer)
- Appetite disruption related to food content
- Concentration difficulties caused by notification overload
Correct answer: Ruminative negative thinking amplified by passive scrolling
Limiting passive social media scrolling reduces exposure to content that fuels ruminative negative thinking, a core PDD feature.
Question 4: A clinician uses a validated e-PHQ-9 delivered via smartphone to monitor a PDD patient between appointments. What is the primary advantage of this approach?
- It eliminates the need for any in-person appointments
- It provides real-time symptom tracking enabling timely clinical response (Correct answer)
- It is significantly cheaper than paper-based assessments
- It prevents patients from underreporting symptoms
Correct answer: It provides real-time symptom tracking enabling timely clinical response
Electronic ecological momentary assessment provides real-time data that allows clinicians to identify symptom worsening and intervene before the next appointment.
Question 5: Wearable devices that track heart rate variability (HRV) are being studied in PDD because low HRV correlates with what?
- Higher risk of cardiovascular disease only
- Reduced autonomic nervous system flexibility and emotional regulation capacity (Correct answer)
- Better sleep quality and mood stability
- Increased physical activity levels
Correct answer: Reduced autonomic nervous system flexibility and emotional regulation capacity
Low HRV reflects reduced autonomic nervous system flexibility, which is associated with impaired emotional regulation seen in persistent depressive states.
Question 6: A digital CBT program for PDD asks users to complete a 'thought record' exercise. What is the purpose of this digital tool?
- To document medication side effects for the prescribing doctor
- To identify and challenge automatic negative thoughts (Correct answer)
- To track physical symptoms like sleep and appetite only
- To create a legal record of the patient's treatment history
Correct answer: To identify and challenge automatic negative thoughts
Thought records are a core CBT technique for identifying, examining, and restructuring the automatic negative thoughts central to depression.
Question 7: Which statement about internet-delivered cognitive behavioral therapy (iCBT) for PDD is supported by research evidence?
- iCBT is equally effective as face-to-face CBT for all severity levels
- Guided iCBT with therapist support outperforms fully self-directed programs (Correct answer)
- iCBT works best when combined with antipsychotic medication
- iCBT has no evidence base and should not be recommended
Correct answer: Guided iCBT with therapist support outperforms fully self-directed programs
Research consistently shows that therapist-guided iCBT produces better outcomes than unguided programs due to accountability and personalized feedback.
Persistent Depressive Disorder Technology & Digital Applications 3
A patient with PDD reports that using a light therapy lamp for 30 minutes each morning has improved their mood.
Which neurobiological mechanism explains this benefit?