Investigating the Optimal Baseline Positioning to Maximize Cognitive Experimental Outcome

Area of Science:

• Cognitive Neuroscience
• Neuroscience
• Psychology

Background:

• Baselines are crucial for standardizing activation measurements in cognitive and emotional research.
• Optimal timing for baseline evaluation in experimental protocols remains uninvestigated.

Purpose of the Study:

• To determine the most effective time interval for baseline evaluation in cognitive tasks.
• To identify optimal baseline periods for differentiating between baseline states and cognitive effort.

Main Methods:

• EEG signals were analyzed during baseline stimuli and cognitive tasks (reaction and working memory).
• Global Field Power (GFP) indexes (Attention, Memorization) and Engagement Index (EI) were extracted.
• Experimental protocol designed to compare different baseline intervals.

Main Results:

• The last baseline stimulus effectively highlighted differences in cognitive workload for Attention and Memorization indexes.
• The Engagement Index showed the greatest difference between the reaction task and baseline after a post-task relaxation period.

Conclusions:

• The optimal baseline period for maximizing cognitive workload differences varies by index.
• Confounding effects and individual differences influence baseline effectiveness.
• Further research is needed to validate these findings on baseline optimization.