The attentional blink with targets in different spatial locations

Area of Science:

• Cognitive Psychology
• Neuroscience
• Experimental Psychology

Background:

• The attentional blink (AB) describes impaired identification of a second target (T2) when it closely follows a first target (T1).
• Lag 1 sparing, where T2 identification is unimpaired at the shortest lag, is a debated phenomenon.
• Previous research has yielded conflicting results regarding the conditions for Lag 1 sparing.

Purpose of the Study:

• To investigate the role of spatial attention shifts in Lag 1 sparing.
• To determine if attentional switches between targets in different locations affect Lag 1 sparing.
• To refine existing attentional gating models of cognitive processing.

Main Methods:

• Participants identified targets (T1 and T2) presented in rapid serial visual presentation (RSVP).
• The spatial relationship between T1 and T2 was manipulated (same vs. different locations).
• Temporal lag between T1 and T2 was varied, with a focus on Lag 1.

Main Results:

• Lag 1 sparing was observed when T1 and T2 appeared in the same location.
• Lag 1 sparing was abolished when T1 and T2 required an attentional switch to different locations.
• Performance on T2 was significantly impaired at Lag 1 when spatial shifts were necessary.

Conclusions:

• Spatial attentional shifts are critical for the occurrence of Lag 1 sparing.
• Attention cannot be reallocated to a new spatial location while processing a preceding stimulus.
• Findings support a modified attentional gating model, emphasizing spatial constraints on attentional processing.