The influence of dichotical fusion on the redundant signals effect, localization performance, and the mismatch negativity

Abstract

In two experiments, each including a simple reaction time (RT) task, a localization task, and a passive oddball paradigm, the physical similarity between two dichotically presented auditory stimuli was manipulated.In both experiments, a redundant signals effect (RSE), high localization performance, and a reliable mismatch negativity (MMN) was observed for largely differing stimuli, suggesting that these are coded separately in auditory memory. In contrast, no RSE and a localization rate close to chance level (experiment 1) or at chance (experiment 2) were observed for stimuli differing to a lesser degree. Crucially, for such stimuli a small (experiment 1) or no (experiment 2) MMN were observed. These MMN results indicate that such stimuli tend to fuse into a single percept and that this fusion occurs rather early within information processing.

A new perspective on binaural integration using response time methodology: super capacity revealed in conditions of binaural masking release

“…The only other research of which we are aware, that has applied concepts from the redundant signals RT approach to binaural perception is a seminal study by Schröter et al (2007) and extended in Schröter et al (2009) and Fiedler et al (2011). Schröter et al (2007) employed the Miller (1982) inequality to assess binaural vs. monaural performance but did not assess performance in terms of the standard parallel model or the Grice bound for extreme limited capacity.…”

Altered perception‐action binding modulates inhibitory control in Gilles de la Tourette syndrome

“…Crucially, ‘actions’ also encompass inhibition of motor responses (Hommel et al., ). In addition, also bimodal stimuli affect response inhibition (Cavina‐Pratesi, Bricolo, Prior, & Marzi, ; Chmielewski, Mückschel, Dippel, & Beste, ; Chmielewski, Wolff, Mückschel, Roessner, & Beste, ; Fiedler, Schröter, Seibold, & Ulrich, ; Gondan, Götze, & Greenlee, ). Such ‘inhibitory control’ is of particular interest since GTS has long been considered a disorder of inhibitory control.…”

Binaural Fusion and Listening Effort in Children Who Use Bilateral Cochlear Implants: A Psychoacoustic and Pupillometric Study

“…Integration at higher centers in the auditory system is important for the perception of one fused auditory image. Fiedler and colleagues found that dichotically presented pure tones were both perceived as fused and integrated cortically, as indicated by the absence of a mismatch negativity waveform [ 46 ]. Despite normal cortical development promoted by CI use [ 5 , 6 , 94 ], deviations from normal remain [ 7 , 120 ].…”

“…Activity in the cortex is also believed to reflect integration [ 46 ]. When cortical activity was recorded with electroencephalography during a passive oddball task, the mismatch negativity waveform was only non-significant for stimuli presented dichotically and with small interaural frequency differences.…”

“…As it stands, the clinical tests most commonly used to assess temporal resolution are the Auditory Fusion Test-Revised, the Random Gap Detection Test for Tones/Clicks, the Gaps-In-Noise for the Right/Left ear, and the Binaural Fusion Test. Because dichotic stimuli have been used to assess binaural integration objectively [ 39 , 46 , 47 ], psychophysical tests that use dichotic stimuli to assess fusion (eg. Binaural Fusion Test) were considered to be most relevant for the present study.…”