Beyond scene gist: Objects guide search more than scene background.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Visual search is facilitated by contextual information.
• The independent contributions of different contextual cues in scenes are not well understood.

Purpose of the Study:

• To isolate and quantify the benefits of distinct contextual cues (object co-occurrence, multiple object configurations, background category) on visual search.
• To understand how these cues impact target detectability, decision bias, confidence, and eye movement guidance.
• To relate the effectiveness of contextual cues to their informativeness about target location.

Main Methods:

• Manipulation of three types of contextual information: object co-occurrence, multiple object configurations, and background category.
• Isolation of the benefits of each cue on target detectability, decision bias, confidence, and eye movement guidance.
• Measurement of cue informativeness using explicit human judgments of likely target locations.

Main Results:

• Object-based contextual information provides greater guidance for eye movements and facilitates perceptual judgments compared to scene background.
• The degree of guidance and facilitation offered by each contextual cue correlates with its informativeness regarding the target's spatial location.
• Human explicit judgments of likely target locations reflect the inherent informativeness of contextual cues.

Conclusions:

• Object-based contextual information plays a crucial role in guiding visual search and improving perceptual judgments.
• The brain's use of contextual cues to direct eye movements is closely linked to the cue's predictive value for target location.
• Distinct contextual scene components contribute differently to search efficiency, with object-level cues being particularly influential.