The Effect of Working Memory Load on Impulsivity During Smoking Abstinence: An Eye-Tracking Study

Area of Science:

• Cognitive psychology
• Neuroscience of addiction
• Behavioral economics

Background:

• Understanding tobacco addiction requires identifying cognitive processes.
• Young smokers exhibit higher impulsivity than non-smokers.
• Working memory (WM) is crucial for inhibiting impulsive behaviors.

Purpose of the Study:

• Examine the relationship between WM capacity and impulsivity.
• Investigate how WM load affects impulsive decision-making in smokers, non-smokers, and abstinent individuals.
• Utilize eye-tracking to analyze attentional strategies during cognitive tasks.

Main Methods:

• Employed a dual-task paradigm combining the N-back (WM) and delay discounting (DD) tasks.
• Recruited 36 participants across three groups: smokers, non-smokers, and abstinent individuals.
• Monitored participants' eye movements throughout task performance.

Main Results:

• N-back task accuracy decreased as task difficulty (n) increased.
• No significant delay discounting (impulsivity) was observed in any group.
• No correlation found between WM capacity (WMC) and trait impulsivity.
• First fixation durations increased with higher WM load, indicating altered information processing.
• Participants showed shorter fixation durations and more revisits on proximal rewards compared to distal rewards.

Conclusions:

• WM load may influence attentional strategies.
• Eye movement patterns, reflecting attentional processes, could serve as potential indicators of impulsivity in addiction.
• Further research is needed to elucidate the role of attention and WM in maintaining tobacco use.