FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4251162016> ?p ?o ?g. }

• W4251162016 endingPage "209" @default.
• W4251162016 startingPage "209" @default.
• W4251162016 abstract "The responses of motion mechanisms have been shown, neurophysiologically and psychophysically, to depend not only on the direction of stimulus motion, but also on contrast, coherence and speed. We examined interactions between contrast, coherence and directional selectivity by measuring directional tuning psychophysically across a wide range of motion coherence and contrast levels. A 2-IFC procedure was used; the ‘noise’ interval contained randomly moving dots and the ‘signal’ interval contained noise plus two superimposed fields of coherently moving dots. Observers reported which interval contained global motion. We tested 7 angular differences between the directions of the two dot fields (d=0, 22.5, 45, 67.5, 90, 135, and 180 ). We obtained two types of thresholds for 3 subjects: (1) coherence thresholds: the proportion of dots moving coherently in the ‘signal’ interval was varied to obtain a coherence threshold for several fixed contrasts (rms, 3.2 – 30.2%) and (2) contrast thresholds: dot contrast was varied to obtain a contrast threshold for several fixed coherence levels (20 – 100% coherence). Thresholds for a given contrast-coherence pairing did not depend on whether coherence was fixed and contrast varied, or vice versa. We assumed the response to each dot field depended multiplicatively on both the contrast and the coherence that dot field, and that the ability to detect global motion in the pair of dot fields depended on the amount of summation between the two fields. Contrast and coherence gain parameters were fixed based on neurophysiological estimates. This very constrained model describes the data well, and estimates a directional tuning bandwidth of ∼83 for directionally selective mechanisms across a wide range of contrasts and coherences. The good fit of the model demonstrates that directional tuning is nearly invariant across a wide range of luminance contrasts and coherence levels, as predicted by models of contrast normalization." @default.
• W4251162016 created "2022-05-12" @default.
• W4251162016 creator A5006872338 @default.
• W4251162016 creator A5024490276 @default.
• W4251162016 creator A5064683287 @default.
• W4251162016 creator A5067084665 @default.
• W4251162016 date "2004-08-01" @default.
• W4251162016 modified "2023-09-30" @default.
• W4251162016 title "Interactions between contrast, coherence and directional tuning" @default.
• W4251162016 doi "https://doi.org/10.1167/4.8.209" @default.
• W4251162016 hasPublicationYear "2004" @default.
• W4251162016 type Work @default.
• W4251162016 citedByCount "0" @default.
• W4251162016 crossrefType "journal-article" @default.
• W4251162016 hasAuthorship W4251162016A5006872338 @default.
• W4251162016 hasAuthorship W4251162016A5024490276 @default.
• W4251162016 hasAuthorship W4251162016A5064683287 @default.
• W4251162016 hasAuthorship W4251162016A5067084665 @default.
• W4251162016 hasBestOaLocation W42511620161 @default.
• W4251162016 hasConcept C10801956 @default.
• W4251162016 hasConcept C120665830 @default.
• W4251162016 hasConcept C121332964 @default.
• W4251162016 hasConcept C168553754 @default.
• W4251162016 hasConcept C2776502983 @default.
• W4251162016 hasConcept C2781181686 @default.
• W4251162016 hasConcept C47091857 @default.
• W4251162016 hasConcept C54101563 @default.
• W4251162016 hasConcept C62520636 @default.
• W4251162016 hasConceptScore W4251162016C10801956 @default.
• W4251162016 hasConceptScore W4251162016C120665830 @default.
• W4251162016 hasConceptScore W4251162016C121332964 @default.
• W4251162016 hasConceptScore W4251162016C168553754 @default.
• W4251162016 hasConceptScore W4251162016C2776502983 @default.
• W4251162016 hasConceptScore W4251162016C2781181686 @default.
• W4251162016 hasConceptScore W4251162016C47091857 @default.
• W4251162016 hasConceptScore W4251162016C54101563 @default.
• W4251162016 hasConceptScore W4251162016C62520636 @default.
• W4251162016 hasIssue "8" @default.
• W4251162016 hasLocation W42511620161 @default.
• W4251162016 hasOpenAccess W4251162016 @default.
• W4251162016 hasPrimaryLocation W42511620161 @default.
• W4251162016 hasRelatedWork W1970223218 @default.
• W4251162016 hasRelatedWork W1983832339 @default.
• W4251162016 hasRelatedWork W2004776498 @default.
• W4251162016 hasRelatedWork W2030857749 @default.
• W4251162016 hasRelatedWork W2033391712 @default.
• W4251162016 hasRelatedWork W2034359634 @default.
• W4251162016 hasRelatedWork W2093074619 @default.
• W4251162016 hasRelatedWork W2137876877 @default.
• W4251162016 hasRelatedWork W2224533880 @default.
• W4251162016 hasRelatedWork W3120832057 @default.
• W4251162016 hasVolume "4" @default.
• W4251162016 isParatext "false" @default.
• W4251162016 isRetracted "false" @default.
• W4251162016 workType "article" @default.