Temporal processing of global and local information varies with global precedence.
The concept of global precedence, which suggests that the global aspect of a scene is processed more rapidly than local details, was examined using the attentional blink paradigm. Eighteen adult subjects observed multiple sequences of complex global-local letter figures to see whether the attentional blink duration would be affected by the visual angle size of the stimulus. Within each sequence, the subject was directed to identify either a global or local red target letter and to detect whether a global or local probe letter (X) was presented in the sequence following the target letter. Stimuli were presented at three different sizes. Results showed significantly higher probe detection rates for global probes than for local at small stimulus sizes. However, using large stimulus sizes, mean correct probe detection was significantly higher in conditions requiring local attention compared to global. No significant difference in probe detection performance was observed between global and local conditions at medium stimulus sizes. The results suggest that the rate of visual information processing varies according to the visual angle of the particular information. The results support the suggestion that the precedence of information is an important factor in the temporal processing of global-local information.
Lawson
Murray L
ML
School of Psychological Science, La Trobe University, Melbourne, Victoria, Australia. m.lawson@latrobe.edu.au
Crewther
Sheila G
SG
Blume-Tari
Astrid
A
Guminsky
Michael
M
Perdikeas
Nektaria
N
Roebuck
Gillian
G
Simmonds
Sara
S
Crewther
David P
DP
D000293:Adolescent; D000328:Adult; D001288:Attention; D001767:Blinking / Q000502:physiology*; D006801:Humans; D014796:Visual Perception / Q000502:physiology*