"Ein Training Kognitiver Kontrolle Emotionaler Inhalte im Arbeitsgedächtnis: Effekte Auf Die Häufigkeit Und Auswirkungen Von Grübeln Bei Depressiven Patienten" (English: Training Cognitive Control Over Emotional Information in Working Memory: Effects on the Frequency of Rumination and Its Impact on Mood in the Daily Lives of Depressed Patients)
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 65
- 试验地点
- 1
- 主要终点
- Change in rumination frequency in daily life
研究概览
简要总结
The present study examines whether a computerized cognitive control training as compared to a placebo (fake) training will reduce the frequency of depressive rumination in depressed individuals. Rumination has been identified as a major risk factor for the onset and recurrence of depressive episodes and it has been suggested that it is linked to deficits in cognitive control functions. It is thus expected that training cognitive control will reduce the frequency of rumination as well as ameliorate its detrimental effect on negative mood states.
详细描述
Rumination has been shown to intensify dysphoric mood and is one of the best researched risk factors for the onset and recurrence of depressive episodes. Accumulating evidence suggests that the tendency to ruminate is linked to impairments in cognitive control functions, especially to problems discarding no longer relevant negative material from working memory (=working memory updating).
The aim of the present study is to examine whether training to update emotional material in working memory will have an effect on the frequency of using rumination as well as on the impact of rumination on mood in the daily lives of clinically depressed participants. Participants will be randomly assigned to 10 sessions of either online cognitive control training or an online placebo condition. The ability to update emotional material in working memory will be assessed pre and post training by two computer tasks (close and far transfer tasks). The effects of the training on daily rumination and the dynamics between daily mood and rumination will be assessed pre- and post-training, as well as at 3-months follow-up using ambulatory assessment (via smartphone app). It is expected that individuals in the training as compared to the placebo group will show a greater reduction in rumination frequency as well as a reduction in the negative impact of rumination on mood.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Participant)
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Diagnostic and Statistical Manual of Mental Disorders 5th edition (DSM-5) criteria for a current major depressive episode
- •18-65 years of age
- •German native language (due to verbal task requirements)
排除标准
- •life time diagnosis of any bipolar or psychotic disorder, or substance dependence
- •substance use disorder within past 12 months
- •current obsessive-compulsive disorder (OCD) or borderline personality disorder (BPS)
- •reporting severe underweight (BMI<18), any neurological disease, severe head injury (e.g. severe concussion), or any brain damage (e.g. due to stroke)
- •concurrent psychotherapy during the duration of the study
研究组 & 干预措施
Adaptive emotional cognitive control training
Adaptive emotional n-back task: On each trial of this task, participants are presented with an emotional facial expression. Participants have to indicate whether the emotion presented in the current trial is the same as n trials back. In order to train participants at their individual ability level, the n-level varies by trial block based on participants' performance on the previous block.
The adaptive emotional n-back task is assumed to train the ability to continuously update emotional material in working memory.
干预措施: Adaptive emotional cognitive control training (Behavioral)
Placebo training
Adaptive non-emotional feature match task: On each trial of this task, participants are presented with two panels containing 8-12 shapes each. Participants are asked to compare the two panels and decide whether or not they are identical. The panels contain a minimum of 8 shapes and a maximum of 12 shapes, depending on participants' performance on the previous block.
The adaptive non-emotional feature match task is assumed to train the speed of responding (involving processes like visual search and concentration). It does not trait working memory updating.
干预措施: Adaptive non-emotional feature match task (Behavioral)
结局指标
主要结局
Change in rumination frequency in daily life
时间窗: from 7-day assessment at pre-training (baseline) to (a) 7-day assessment at post-training (within a week after the end of the training phase), and (b) 7-day assessment at 3-months follow-up
Rumination frequency is measured by 2 items in the ambulatory assessment. The ambulatory assessment is employed for 7 days pre-training, 7 days post-training (within a week after the end of the training phase), and 7 days at 3-months follow-up with 8 prompts per day during each assessment period
Change in the impact of daily rumination on daily mood
时间窗: from 7-day assessment at pre-training (baseline) to (a) 7-day assessment at post-training (within a week after the end of the training phase), and (b) 7-day assessment at 3-months follow-up
The impact of rumination on mood is assessed as the effect of rumination at time t on depressed and positive mood at time t+1 in a multi level model; Time t refers to consecutive assessment points in the ambulatory assessment. The ambulatory assessment is employed for 7 days pre-training, 7 days post-training (within a week after the end of the training phase), and 7 days at 3-months follow-up with 8 prompts per day during each assessment period. Rumination frequency is assessed by two items; depressed and positive mood are each assessed by the average score of two items.
次要结局
- Change in the ability to update emotional material in working memory(from pre-training to post-training (within a week after the end of the training phase))
- Change in depressed mood and depressive symptoms(from 7-day assessment at pre-training (baseline) to (a) 7-day assessment at post-training (within a week after the end of the training phase), and (b) 7-day assessment at 3-months follow-up)
- Change in levels of disability(from pre-training to post-training (within a week after the end of the training phase))
研究者
Ulrike Zetsche
Dr. rer. nat.
Freie Universität Berlin