Investigating the (cost-) effectiveness of attention bias modification (ABM) for outpatients with major depressive disorder (MDD): a randomized controlled trial protocol

Table 1 Overview of all measures and corresponding time points

Domain	Target Concept (Measure)	T0	T1	Training 1	Training 2–8	T2	T3	T4	T5
Screening measures	Inclusion Criteria Interview	•
Screening measures	Diagnostic status (MINI)	•							•
Primary outcome measures	Attentional Bias (Dot-probe)		•			•
	Depressive Symptomatology (IDS-SR)		•			•	•	•	•
	Mood response and recovery from speech task (I PANAS-SF & short STAI-S)					•
Secondary outcome measures	Trait Anxiety (STAI-T)		•			•	•	•
	Positive and Negative Affect (PANAS)		•			•	•	•
	Rumination (RRS)		•			•	•	•
	Resilience (RS)		•				•	•
	Cognitive transfer -Verbal attentional bias (emotional Stroop task) -Attentional control (classical Stroop task) -Mental imagery (PIT, SUIS)		•			•
Process measures	Attentional Bias (Dot-probe training trials)			•	•
	Mood in response to training (VAS)			•	•
	Credibility and Expectancy (CEQ)			•
Cost-effectiveness	Quality of Life (EQ-5D-3 L)		•			•	•	•	•
Cost-effectiveness	Costs (TIC-P)		•						•

Note. T0 = Intake; T1 = Baseline; T2 = Post-assessment; T3 = One month follow-up; T4 =Six months follow-up; T5 = 12 months follow-up; Measures at T1, Training 1 and T2 are administered by an experimenter, who is blinded to the training conditions. Training 2–8 and all follow-up measures (T3–T5) are administered via the internet