Related Experiment Video
Updated: Jan 22, 2026

Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke
Published on: June 6, 2025
Cognitive Rehabilitation and Exposure/Sorting Therapy for Late-Life Hoarding: Effects on Neuropsychological
Catherine R Ayers1,2, Eliza J Davidson3,4, Mary E Dozier3,4,5
1Mental Healthcare Line, VA San Diego Healthcare System, California.
Insights
Cognitive Rehabilitation and Exposure/Sorting Therapy (CREST) improved executive functioning in older adults with hoarding disorder. Specifically, CREST enhanced cognitive flexibility and inhibition, aiding task switching.
Area of Science:
- Gerontology
- Neuropsychology
- Psychiatry
Background:
- Hoarding disorder (HD) is marked by compulsive saving and clutter, often linked to executive functioning deficits.
- Previous research established Cognitive Rehabilitation and Exposure/Sorting Therapy (CREST) as effective for reducing hoarding symptoms in older adults.
Purpose of the Study:
- To investigate the impact of CREST on executive functioning in older adults diagnosed with hoarding disorder.
- To determine if CREST improves specific executive functions beyond its effects on hoarding symptoms.
Main Methods:
- A randomized controlled trial compared CREST with a care management control group.
- Participants underwent neurocognitive assessments at baseline and posttreatment.
- Linear mixed models analyzed changes in global and specific executive functioning variables.
Main Results:
- No significant improvement was observed in the Global Deficit score between groups.
- Participants receiving CREST showed significant improvements in cognitive flexibility and inhibition compared to the control group.
- These improvements suggest enhanced task switching abilities in the CREST group.
Conclusions:
- CREST demonstrates potential for improving specific executive functions, such as cognitive flexibility and inhibition, in older adults with hoarding disorder.
- These findings suggest CREST may enhance task switching capabilities, a crucial aspect of executive functioning.
Objectives:
Hoarding disorder (HD) is characterized by urges to save items, difficulty discarding possessions, and excessive clutter and has been associated with executive functioning deficits. A randomized controlled trial comparing Cognitive Rehabilitation and Exposure/Sorting Therapy (CREST) with a care management control condition demonstrated the efficacy of CREST in reducing hoarding symptoms in older adults. The purpose of the current study was to assess whether CREST may also lead to improved executive functioning.
Method:
All participants were administered a neurocognitive battery at baseline and posttreatment. Linear mixed models with random intercepts were used to evaluate change in global neuropsychological functioning as well as change in individual executive functioning variables.
Results:
There was no significant group by time interaction for the Global Deficit score; however, there were significant group by time interactions on two of the executive functioning variables examined, such that participants in the CREST condition demonstrated significant improvement in cognitive flexibility and inhibition over time compared with the participants in the care management condition.
Discussion:
Our initial findings support the notion that CREST may be able to improve task switching, an important component of executive functioning, in older adults with HD.
Related Concept Videos
Cognitive Therapy
Beck's Cognitive Therapy
Arbitrary Inference
Arbitrary inference involves making conclusions without sufficient...
Cognitive Dissonance
Half-life of a Reaction
Characteristics of Life
The Angiosperm Life Cycle

