Salience drives overt selection of two equally relevant visual targets

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Understanding attentional selection is crucial for explaining visual search behavior.
• Previous research has explored factors influencing attentional guidance, including task relevance and stimulus properties.
• The interplay between salience and task relevance in sequential object selection remains an area of interest.

Purpose of the Study:

• To investigate whether physical salience dictates the order of attentional selection when participants search for two equally task-relevant visual targets.
• To determine the influence of differing stimulus salience on the sequence of eye movements during visual search.

Main Methods:

• Tracking overt attentional selection through participants' eye movements.
• Presenting observers with two task-relevant singleton targets of differing physical salience (color vs. shape).
• Instructing participants to make natural eye movements to assess target features.

Main Results:

• Observers fixated both task-relevant targets in most trials.
• Saccades to the more salient color singleton consistently preceded saccades to the less salient shape singleton.
• Stimulus salience significantly influenced the sequence of object selection.

Conclusions:

• Visual salience is a primary determinant of attentional object selection order when task relevance is equated.
• This finding contributes to models of visual attention and search.
• The results highlight the automatic influence of stimulus properties on guiding attention.