| Autor: |
Jannati A; Simon Fraser University, Burnaby, BC, Canada. ali_jannati@alumni.sfu.ca, Spalek TM, Lagroix HE, Di Lollo V |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of experimental psychology. Human perception and performance [J Exp Psychol Hum Percept Perform] 2012 Feb; Vol. 38 (1), pp. 161-8. Date of Electronic Publication: 2011 Nov 07. |
| DOI: |
10.1037/a0025985 |
| Abstrakt: |
Identification of the second of two targets (T2) is impaired when presented shortly after the first (T1). This attentional blink (AB) is thought to arise from a delay in T2 processing during which T2 is vulnerable to masking. Conventional studies have measured T2 accuracy which is constrained by the 100% ceiling. We avoided this problem by using a dynamic threshold-tracking procedure that is inherently free from ceiling constraints. In two experiments we examined how AB magnitude is affected by three masking-related factors: (a) presence/absence of T2 mask, (b) T2-mask stimulus onset asynchrony (SOA), and (c) level of T2 impoverishment (signal-to-noise ratio [SNR]). In Experiment 1, overall accuracy decreased with T2-mask SOA. The magnitude of the AB, however, was invariant with SOA and with mask presence/absence. Experiment 2 further showed that the AB was invariant with T2 SNR. The relationship among mask presence/absence, SOA, and T2 SNR and the AB is encompassed in a qualitative model. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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