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Updated: Jan 25, 2026
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Measuring Attentional Biases for Threat in Children and Adults
Published on: October 19, 2014
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Interactions between spatial attention and alertness in healthy adults: A meta-analysis
Dilushi Chandrakumar1, Hannah A D Keage1, Daria Gutteridge1
1Cognitive Ageing and Impairment Neurosciences Laboratory, University of South Australia, Australia.
Summary
Alertness influences spatial attention, with higher alertness shifting focus leftward. Handedness significantly modulates this relationship, impacting attention allocation in healthy adults.
Area of Science:
- Cognitive Neuroscience
- Experimental Psychology
Background:
- Visuospatial attention is critical for safety, and deficits can have severe consequences.
- Alertness levels are known to influence the speed and accuracy of attending to stimuli.
- A prevailing model suggests low alertness correlates with a rightward attention bias, while increased alertness shifts attention leftward.
Purpose of the Study:
- To synthesize existing literature on the relationship between spatial attention and alertness.
- To identify factors that modulate this relationship in healthy adults.
- To evaluate the potential of alertness enhancement as a rehabilitation strategy for attentional deficits.
Main Methods:
- A meta-analysis was conducted on 19 peer-reviewed articles meeting specific inclusion criteria.
- The study examined the effect size of alertness on spatial bias.
- Five potential modulators were investigated: experimental design, alertness manipulation, alertness measurement, spatial task type, and handedness.
Main Results:
- A small, statistically significant effect of alertness on spatial bias was found (d = .302).
- No evidence of systematic publication bias was detected.
- Handedness emerged as the sole significant modulator of the alertness-spatial attention relationship among the factors investigated.
Conclusions:
- The findings align with established models of spatial attention and alertness.
- Enhancing alertness may be a viable approach to mitigate left-sided inattention in clinical populations like neglect patients.
- Further research is needed to explore the underlying neurological mechanisms and real-world applicability of these findings.
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