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221 results
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The attentional blink in space and time.
Kristjánsson A, Nakayama K. Kristjánsson A, et al. Vision Res. 2002 Aug;42(17):2039-50. doi: 10.1016/s0042-6989(02)00129-3. Vision Res. 2002. PMID: 12169423
In the first experiment, six streams of letters were presented simultaneously around a circle on a screen. The identity of the letters changed every 140 ms. ...Similar results were obtained in a second experiment where observers performed a cued discri …
In the first experiment, six streams of letters were presented simultaneously around a circle on a screen. The identity of the …
In search of remembrance: evidence for memory in visual search.
Kristjánsson A. Kristjánsson A. Psychol Sci. 2000 Jul;11(4):328-32. doi: 10.1111/1467-9280.00265. Psychol Sci. 2000. PMID: 11273394
Observers searched for a target among distractors while the display items traded places every 110 ms. Search was slower when the target was always relocated to a position previously occupied by a distractor than when the items remained in place, showing the i …
Observers searched for a target among distractors while the display items traded places every 110 ms. Search was slower when the targ …
Increased sensitivity to speed changes during adaptation to first-order, but not to second-order motion.
Kristjánsson A. Kristjánsson A. Vision Res. 2001 Jun;41(14):1825-32. doi: 10.1016/s0042-6989(01)00055-4. Vision Res. 2001. PMID: 11369046
Curvature discontinuities are cues for rapid shape analysis.
Kristjánsson A, Tse PU. Kristjánsson A, et al. Percept Psychophys. 2001 Apr;63(3):390-403. doi: 10.3758/bf03194407. Percept Psychophys. 2001. PMID: 11414128
Less attention is more in the preparation of antisaccades, but not prosaccades.
Kristjánsson A, Chen Y, Nakayama K. Kristjánsson A, et al. Nat Neurosci. 2001 Oct;4(10):1037-42. doi: 10.1038/nn723. Nat Neurosci. 2001. PMID: 11547337
To make a saccadic eye movement to a target we must first attend to it. It is therefore not surprising that diverting attention increases saccade latency, but is latency increased in all cases? We show that attending to a peripheral discrimination task has …
To make a saccadic eye movement to a target we must first attend to it. It is therefore not surprising that diverting attentio …
Rapid, object-based learning in the deployment of transient attention.
Kristjánsson A, Mackeben M, Nakayama K. Kristjánsson A, et al. Perception. 2001;30(11):1375-87. doi: 10.1068/p3251. Perception. 2001. PMID: 11768490
We show that transient attention summoned by an exogenous cue shows rapid learning of the relationship between the cue and a subsequent target in a discrimination task. In experiment 1, performance was unaffected when a target always appeared in the same posi …
We show that transient attention summoned by an exogenous cue shows rapid learning of the relationship between the cue and a subseque …
The role of priming in conjunctive visual search.
Kristjánsson A, Wang D, Nakayama K. Kristjánsson A, et al. Cognition. 2002 Aug;85(1):37-52. doi: 10.1016/s0010-0277(02)00074-4. Cognition. 2002. PMID: 12086712
The role of priming was also demonstrated on a trial-by-trial basis in a 'streak' condition where target and distractor identity was unpredictable yet was consistent within streaks. When the target to be found was the same for a few trials in a row, se …
The role of priming was also demonstrated on a trial-by-trial basis in a 'streak' condition where target and distractor identi …
A primitive memory system for the deployment of transient attention.
Kristjánsson A, Nakayama K. Kristjánsson A, et al. Percept Psychophys. 2003 Jul;65(5):711-24. doi: 10.3758/bf03194808. Percept Psychophys. 2003. PMID: 12956579
When transient attention is summoned by the sudden appearance of a large cue, it can be deployed to a small portion of the cue where a target appeared on previous trials (Kristjánsson, Mackeben, & Nakayama, 2001). ...Thus, transient attention can be summo …
When transient attention is summoned by the sudden appearance of a large cue, it can be deployed to a small portion of the cue …
When pros become cons for anti- versus prosaccades: factors with opposite or common effects on different saccade types.
Kristjánsson A, Vandenbroucke MW, Driver J. Kristjánsson A, et al. Exp Brain Res. 2004 Mar;155(2):231-44. doi: 10.1007/s00221-003-1717-9. Epub 2003 Dec 6. Exp Brain Res. 2004. PMID: 14661119 Clinical Trial.
The novel finding was that the opposite pattern was observed for antisaccades, consistent with a difficulty in overcoming a stronger prosaccade tendency after temporal-hemifield stimulation. A second experiment showed that these results were not simply due to …
The novel finding was that the opposite pattern was observed for antisaccades, consistent with a difficulty in overcoming a st …
Priming of color and position during visual search in unilateral spatial neglect.
Kristjánsson A, Vuilleumier P, Malhotra P, Husain M, Driver J. Kristjánsson A, et al. J Cogn Neurosci. 2005 Jun;17(6):859-73. doi: 10.1162/0898929054021148. J Cogn Neurosci. 2005. PMID: 15969905 Clinical Trial.
Both patients, like the healthy controls we tested, showed intact priming, with performance speeded when either the location or color of a singleton target was repeated over successive trials in a standard search condition (Experiment 1). ...Moreover, priming of sea …
Both patients, like the healthy controls we tested, showed intact priming, with performance speeded when either the location or color of …
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