Posner Cueing Task
The Posner Cueing Task is a cognitive psychology experiment that measures spatial attention and response time. In this task, you will respond to visual targets that appear after spatial cues, which can be either valid (correctly indicating where the target will appear) or invalid (indicating the wrong location).
Frequently Asked Questions
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What is spatial orientation in the Posner task?
Spatial orientation occurs when attention is drawn to a specific location. In the Posner task, this drawing of attention to a location is called cueing. We are quicker to detect objects at places that have been cued before.
What are valid and invalid cues?
Valid cues inform a participant about the location where something task-relevant will happen (e.g., a flash at the location where a to-be detected stimulus will appear). Invalid cues occur at a location where nothing relevant will happen.
What are informative vs uninformative cues?
If the location of a cue is random, it is uninformative. In this experiment, the cue has 80% validity (in 4 out of 5 times, the target appears at the cued location), making it informative.
How many trials are in this implementation?
This implementation contains 100 trials. 80% have valid cues (the target appears at the cued location), and 20% have invalid cues (the target appears at the opposite location). The cue flashes briefly (75 ms) and the target appears 75 ms after the cue disappears; responses faster than 200 ms are counted as anticipations and excluded from the reaction-time averages. Note that this version uses a single cue–target interval (150 ms), so it shows overall orienting but cannot separate early facilitation from later inhibition of return (IOR) — distinguishing those two effects requires comparing multiple cue–target intervals.
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About the Posner Cueing Task
The Posner Cueing Task, developed by Michael Posner in 1980, is a fundamental paradigm in cognitive psychology used to study spatial attention. The task demonstrates how visual cues can direct attention to specific locations, affecting reaction times to subsequent targets.
In a typical trial, participants fixate on a central point, then a cue appears briefly on one side. Shortly after, a target appears either at the cued location (valid trial) or at the opposite location (invalid trial). Participants typically respond faster to targets at validly cued locations, demonstrating the "cueing effect."
The difference in reaction time between invalid and valid trials (the "cueing effect") is a measure of attentional orienting. This effect has been used to study various aspects of attention, including automatic vs. controlled attention, and has applications in understanding attention-related disorders.
References
- Posner, M. I. (1980). Orienting of attention. Quarterly Journal of Experimental Psychology, 32(1), 3-25. 10.1080/00335558008248231
- Chun, M. M. (2000). Contextual cueing of visual attention. Trends in Cognitive Sciences, 4(5), 170-178.
- Posner, M. I., Snyder, C. R. R., & Davidson, B. J. (1980). Attention and the detection of signals. Journal of Experimental Psychology: General, 109(2), 160-174. 10.1037/0096-3445.109.2.160
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About This Experiment
This experiment is an educational adaptation for demonstration purposes. It is not a clinical diagnostic tool. Results reflect your performance in this specific session and should not be interpreted as an assessment of your cognitive abilities.
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