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The Franssen effect illusion in budgerigars (Melopsittacus undulatus) and zebra finches (Taeniopygia guttata)
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10.1121/1.2799493
/content/asa/journal/jasa/122/6/10.1121/1.2799493
http://aip.metastore.ingenta.com/content/asa/journal/jasa/122/6/10.1121/1.2799493
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematics of (a) SS and (b) FE stimuli. The SS stimulus was a single stimulus presented to either the right or left. This stimulus had an abrupt onset, a offset ramp, and lasted total. The FE stimuli were presented to two locations simultaneously (transient to the left and sustained to the right or vice versa). The transient stimulus had an abrupt onset, a offset ramp, and lasted a total of . The sustained stimulus had a onset ramp, a offset ramp, and lasted total.

Image of FIG. 2.
FIG. 2.

Results for budgerigars with a 180° speaker separation distance. (a) The mean percent of trials where subjects incorrectly classified the SS stimuli as a function of stimulus frequency under echoic (black bars) and echo-reduced (white bars) conditions. Error bars represent between-subject standard errors. (b) The mean percent of trials where subjects indicated that they perceived the paired FE stimuli at the location of the transient as a function of stimulus frequency under echoic (black bars) and echo-reduced (white bars) conditions. Error bars represent between-subject standard errors. (c) Correlations between the percent of SS error and the percent of trials the subjects indicated that they perceived the paired FE stimuli at the location of the transient under echoic conditions. Each symbol type represents a different individual subject and each data point represents a different frequency. Regression lines for all data are also shown. (d) The same graph as in (c), except the results were collected under echo-reduced conditions.

Image of FIG. 3.
FIG. 3.

Results for zebra finches with a 180° speaker separation distance. Plots are as in Fig. 2.

Image of FIG. 4.
FIG. 4.

Results for budgerigars with a 60° speaker separation distance. Plots are as in Fig. 2.

Image of FIG. 5.
FIG. 5.

Results for zebra finches with a 60° speaker separation distance. Plots are as in Fig. 2.

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/content/asa/journal/jasa/122/6/10.1121/1.2799493
2007-12-01
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The Franssen effect illusion in budgerigars (Melopsittacus undulatus) and zebra finches (Taeniopygia guttata)
http://aip.metastore.ingenta.com/content/asa/journal/jasa/122/6/10.1121/1.2799493
10.1121/1.2799493
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