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Design and Implementation of an fMRI Study Examining Thought Suppression in Young Women with, and At-risk, for Depression

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Published on: May 19, 2015

Rumination and impaired resource allocation in depression.

Sara M Levens¹, Luma Muhtadie, Ian H Gotlib

¹Department of Psychology, Stanford University, CA 94305, USA. slevens@stanford.edu

Journal of Abnormal Psychology

|November 11, 2009

Summary

Depression is linked to cognitive deficits, particularly in allocating mental resources. This study found that depressed individuals struggle more with complex tasks, a difficulty associated with rumination.

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Area of Science:

Cognitive Psychology
Clinical Psychology
Neuroscience

Background:

Depression is associated with cognitive impairments.
Rumination is theorized to capture cognitive resources, contributing to these deficits.

Purpose of the Study:

To investigate the relationship between rumination and cognitive resource allocation in depression.
To determine if impaired resource allocation in depressed individuals is linked to rumination.

Main Methods:

A modified dual-task recency-probes task was used to assess cognitive resource allocation.
Twenty-five depressed and 25 non-depressed participants completed low- and high-interference conditions.
Performance was compared across conditions to measure controlled allocation of cognitive resources.

Main Results:

Depressed participants showed significantly worse performance than non-depressed participants only in the high-interference condition.
Performance was comparable between groups in low-interference conditions.
Impairment in the high-interference condition strongly correlated with rumination levels in depressed individuals (r=.74).

Conclusions:

Impaired cognitive resource allocation is a key feature of depression.
Rumination is significantly associated with these allocation impairments.
These findings suggest a mechanism linking rumination to cognitive deficits in depression.