The emotional Stroop task and posttraumatic stress disorder: a meta-analysis

Area of Science:

• Psychology
• Neuroscience
• Clinical Psychology

Background:

• Posttraumatic stress disorder (PTSD) significantly impacts quality of life.
• The emotional Stroop task (EST) is used to study cognitive deficits in PTSD, but findings are inconsistent.
• A meta-analysis is needed to synthesize existing EST research in PTSD.

Purpose of the Study:

• To conduct a meta-analysis of emotional Stroop task (EST) studies in posttraumatic stress disorder (PTSD) populations.
• To synthesize inconsistent findings regarding EST performance in PTSD.
• To identify factors influencing EST performance in PTSD.

Main Methods:

• Meta-analysis of 26 studies involving 538 PTSD participants, 254 non-trauma controls (NTC), and 276 trauma-exposed controls (TC).
• Analysis of EST performance differences between PTSD, TC, and NTC groups.
• Moderator analyses examining design (blocked vs. randomized), stimuli (unmasked vs. masked), and trauma type (assaultive vs. non-assaultive).

Main Results:

• PTSD-relevant words impaired EST performance in PTSD and TC groups more than in NTC groups.
• Within-subject analyses showed PTSD-relevant and generally threatening words impaired performance in PTSD groups, while only PTSD-relevant words impaired performance in TC groups.
• Effects were stronger in blocked designs, with unmasked stimuli, and for assaultive trauma samples.

Conclusions:

• Emotional Stroop task (EST) performance is differentially affected by trauma-related stimuli in individuals with posttraumatic stress disorder (PTSD) and trauma-exposed controls.
• Methodological factors like study design and stimulus presentation significantly moderate EST effects in PTSD.
• Findings have implications for understanding PTSD cognitive mechanisms and developing targeted interventions.