Optimizing perception: Attended and ignored stimuli create opposing perceptual biases.

Area of Science:

• Cognitive Neuroscience
• Visual Perception
• Human Vision

Background:

• Human visual perception maintains continuity despite constant sensory change.
• Previous research focused on attended stimuli's role in perceptual continuity.
• The influence of actively ignored stimuli on visual continuity remains largely unexplored.

Purpose of the Study:

• To investigate how both attended targets and ignored distractors influence visual perception.
• To determine if ignored stimuli bias perception differently than attended stimuli.
• To understand the role of ignored information in maintaining perceptual continuity.

Main Methods:

• An odd-one-out visual search task was employed.
• Observers searched for a uniquely oriented line among distractors.
• Perceptual biases were measured using a target orientation adjustment task.

Main Results:

• Perception is influenced by at least two opposing biases from past stimuli.
• Serial dependence causes a positive bias, pulling perception toward previous target features.
• Ignored distractor features induce a negative bias, pushing perception away from the distractor distribution.

Conclusions:

• Actively ignored stimuli significantly contribute to visual perceptual continuity.
• Ignored items generate a perceptual bias that operates in parallel with biases from attended items.
• This study provides the first evidence for the role of actively ignored information in optimizing visual perception.