Contingent orienting or contingent capture: a size singleton matching the target-distractor size relation cannot...

Area of Science:

• Cognitive Psychology
• Visual Attention Research

Background:

• Understanding attentional capture is crucial for explaining visual processing.
• The role of distractor properties, such as size and color, in guiding attention is a key area of investigation.

Purpose of the Study:

• To investigate if a peripheral size-singleton distractor, matching the target-distractor size relation, can capture attention.
• To compare the attentional capture efficacy of size-relation-matched distractors versus color-matched distractors.

Main Methods:

• Three experiments were conducted using visual search paradigms.
• Participants identified central targets amidst peripheral distractors manipulated for size and color properties.
• The position of distractors relative to the attentional window was varied.

Main Results:

• A size singleton matching the target-distractor size relation did not capture attention when presented outside the attentional window.
• The same size singleton did produce a cuing effect, indicating some processing.
• A color singleton matching the target color successfully captured attention when outside the attentional window.

Conclusions:

• Size-relation-matched distractors are significantly weaker in capturing attention compared to color-matched distractors.
• Distractors must appear within the attentional window to effectively capture attention, particularly for size-based properties.