Meta-analytic evidence for the complex mechanisms underlying congruency sequence effect.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Experimental Psychology

Background:

• The congruency sequence effect (CSE) describes a phenomenon in conflict-inducing tasks where the impact of incongruent trials is reduced following prior incongruent trials.
• Existing research presents ongoing debate regarding the precise cognitive mechanisms driving the CSE, necessitating further investigation.

Purpose of the Study:

• To conduct a comprehensive meta-analysis of studies investigating the CSE over the past 31 years (1992-2023).
• To determine the extent to which top-down versus bottom-up mechanisms contribute to the CSE.
• To differentiate between local task-specific and global experiment-wide control mechanisms influencing the CSE.

Main Methods:

• Systematic meta-analysis of published CSE research from 1992 to 2023.
• Calculation of mean effect sizes (Hedges' g) across diverse tasks and experimental procedures.
• Analysis of CSE magnitude in relation to the presence of bottom-up confounds and task structure (within-task vs. between-task).

Main Results:

• The CSE was significant regardless of bottom-up confounds (Hedges' g = 0.95), though larger when present (Hedges' g = 1.28).
• CSE was robust both within-task (Hedges' g = 1.54) and between-task (Hedges' g = 0.27), indicating influence on both local and global control.
• Findings suggest the congruency effect and CSE may rely on distinct control mechanisms, and tasks like prime-probe and flanker tasks effectively isolate CSE mechanisms.

Conclusions:

• The meta-analysis provides converging evidence supporting previous findings on the CSE.
• The results underscore the intricate interplay of factors, including local and global control mechanisms, contributing to the CSE.
• Specific experimental paradigms are recommended for future research to further elucidate the CSE.