Affective working memory in depression

Area of Science:

• Cognitive Psychology
• Clinical Psychology
• Neuroscience

Background:

• Depression is linked to executive functioning deficits, particularly in working memory (WM).
• Theoretical models suggest affective contexts exacerbate these WM difficulties in depression.
• Previous research on affective WM in depression has yielded inconsistent findings.

Purpose of the Study:

• To investigate affective working memory (WM) capacity in individuals with current depression, in remission from depression, and healthy controls.
• To determine if affective contexts disproportionately impair WM capacity in depressed individuals.
• To compare WM performance across neutral and affective (negative distractor) contexts.

Main Methods:

• A preregistered complex span task was employed to assess WM capacity.
• Participants included individuals with current depression (n=24), in remission (n=25), and healthy controls (n=30).
• WM capacity was measured using performance in neutral versus negative distractor image conditions.

Main Results:

• Overall WM capacity was significantly impaired in the presence of negative distractor images compared to neutral images.
• Individuals with any lifetime history of depression (current or remitted) performed worse than healthy controls.
• No evidence supported a greater disruption of WM capacity in affective versus neutral contexts for those with a lifetime history of depression.

Conclusions:

• While overall WM capacity is reduced in depression and sensitive to negative distractors, the hypothesized affective exacerbation was not supported.
• Findings contribute to understanding executive function deficits in depression and inform theoretical models.
• Further research is needed to clarify the precise role of affective context in depression-related WM impairments.