Can increased cognitive load help people with subthreshold depression to forget negative information?

Area of Science:

• Cognitive Psychology
• Clinical Psychology
• Neuroscience

Background:

• Sub-threshold depression (SD) is a significant risk factor for major depressive disorder.
• Interventions for SD are increasingly important due to its public health impact.
• Understanding memory processes in SD is crucial for developing effective treatments.

Purpose of the Study:

• To investigate the effect of cognitive load on the directed forgetting of negative memories in individuals with SD.
• To propose and evaluate a cognitive load intervention (CLI) for reducing depression symptoms in SD.

Main Methods:

• Study 1: Compared directed forgetting of negative items between 53 SDs and 52 controls under varying cognitive loads.
• Study 2: Assessed the efficacy of an 8-week CLI program in 62 SDs, monitoring depression symptom changes.
• Participants regularly recorded depression symptoms throughout the intervention period.

Main Results:

• Individuals with SD experienced greater difficulty forgetting negative items compared to controls.
• Increased cognitive load facilitated the directed forgetting of negative memories in SDs.
• The 8-week CLI significantly reduced depression symptoms in SD participants (e.g., BDI-II scores).

Conclusions:

• Cognitive load can enhance the ability of individuals with SD to forget negative information.
• The CLI program demonstrated effectiveness in reducing depression levels in SD.
• These findings provide initial support for using CLI as a treatment for sub-threshold depression.