Task switching with probabilistic reward schemes

Area of Science:

• Cognitive Psychology
• Decision Making
• Behavioral Neuroscience

Background:

• Previous research links reward prospect changes to task switching behavior.
• Increased reward prospect generally enhances cognitive flexibility and voluntary switch rate (VSR).
• Random rewards in prior tasks often lead to lower VSR, suggesting task persistence.

Purpose of the Study:

• To investigate the effect of probabilistic reward schemes on task switching.
• To examine how high versus low reward probabilities influence voluntary switch rate (VSR).
• To determine if reward history impacts switch costs.

Main Methods:

• Three experiments involving voluntary and cued task switching paradigms.
• Probabilistic reward conditions (high vs. low reward probability) were implemented.
• Voluntary switch rate (VSR) and switch costs were measured.

Main Results:

• Participants exhibited a lower VSR after receiving a reward, irrespective of reward probability (win-stay, lose-shift strategy).
• Reward history did not influence switch costs, suggesting preserved cognitive flexibility.
• The findings extend previous observations on reward prospect transitions and task switching.

Conclusions:

• A win-stay, lose-shift (WSLS) strategy appears dominant in probabilistic reward environments for task switching.
• Reward history influences task repetition but not the cognitive cost of switching.
• Results contribute to understanding decision-making strategies and cognitive control under varying reward contingencies.