Eye movements and the label feedback effect: Speaking modulates visual search via template integrity

Area of Science:

• Cognitive Psychology
• Visual Perception
• Psycholinguistics

Background:

• The label-feedback hypothesis suggests language influences visual processing.
• Previous research indicated repeating target names speeds visual search.
• The current study extends this by investigating language's role in attentional guidance versus object perception.

Purpose of the Study:

• To determine if self-directed speech affects target locating (attentional guidance) or object perception (distractor rejection, target appreciation).
• To replicate and extend prior findings on language and visual search.
• To explore the mechanisms by which language impacts visual search efficiency.

Main Methods:

• Three experiments involving object search tasks.
• Participants spoke target names, nonwords, or irrelevant object names during search.
• Response times, accuracy, and eye movements (eye-tracking) were recorded.

Main Results:

• Speaking target names significantly improved search speed and accuracy compared to other conditions.
• Eye-tracking data indicated language primarily affects distractor rejection and target appreciation, not attentional guidance.
• A linear order of performance was observed: target name, nonword, distractor-absent, distractor-present conditions.

Conclusions:

• Self-directed speech, specifically naming targets, enhances visual search by improving object perception.
• Language appears to aid in maintaining a search template, facilitating target-distractor differentiation.
• Findings support the label-feedback hypothesis regarding language's role in visual processing.