A trained perceptual bias that lasts for weeks.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Classical (Pavlovian) conditioning can modify stimulus perception.
• Perceptual learning aims to enhance accuracy by aligning prior beliefs with statistical likelihoods.
• Long-lasting effects are crucial for the functional significance of learned perceptual biases.

Purpose of the Study:

• To investigate the long-term persistence of learned perceptual biases.
• To determine if conditioning influences the perceived rotation direction of a Necker cube.
• To assess the duration of perceptual bias over several weeks.

Main Methods:

• Trained participants to associate specific retinal locations with different biases in Necker cube apparent rotation direction.
• Utilized interleaved presentations of ambiguous and disambiguated (using disparity and occlusion cues) cubes.
• Tested four groups at 1, 7, 14, and 28 days post-training using counter-conditioning.

Main Results:

• All participant groups exhibited incomplete re-learning of the reversed contingency after the initial training.
• A subset of participants showed an increased reverse bias after repeating counter-conditioning, indicating a lasting effect of the first session.
• Original learning effects were still detectable four weeks after initial training.

Conclusions:

• Learned perceptual biases, specifically for Necker cube rotation, can be long-lasting, persisting for at least four weeks.
• The persistence of these biases suggests underlying mechanisms that enhance perceptual accuracy and efficiency.
• Initial counter-conditioning sessions themselves can induce long-lasting effects on perceptual bias.