Contribution of the left ear stimulus to dichotic listening performance following commissurotomy was studied in five patients. In two tasks, subjects were asked to identify in writing both members of a pair of competing stimuli, either digits or CV syllables. A third task required subjects to integrate high and low frequency components of a single word presented dichotically. Left ear performan...

Two patterns of appropriately filtered acoustic white noise can be binaurally fused by the human auditory system to extract pitch and location information that is not available to either ear alone. This phenomenon is called dichotic pitch. Here we present a new method for generating more effective and useful dichotic pitch stimuli. These novel stimuli allow the psychophysical assessment of dich...

The authors examined the right ear advantage in a dichotic listening task in healthy aging and very mild and mild stages of Alzheimer's disease. Subjects were simultaneously presented 3 pairs of digits to the left and right ears (e.g., left ear: 4, 3, 1; right ear: 9, 2, 5) for immediate ordered recall. Four lists of triads were presented, varying in presentation rate between digit pairs within...

One test of dichotic listening utilizing nonverbal stimuli is included on the VA-CD Tonal and Speech Materials for Auditory Perceptual Assessment, Disc 1.0. It is a test using three tone complexes that meet the definition of musical chords. The dichotic chords were included as a complement to the three dichotic speech procedures on the VA disc because musical chords may depend on right hemisphe...

This case study reports the auditory findings in one patient with left temporal lobectomy. Behavioral and electrophysiologic central auditory tests were administered just before and 1 week after surgical removal of the left anterior temporal lobe, including the amygdala and portions of the hippocampus. The dichotic digits test and late auditory evoked potentials with P-300 showed marked improve...

OBJECTIVE To analyze auditory processing test results in children suffering from otitis media in their first five years of age, considering their age. Furthermore, to classify central auditory processing test findings regarding the hearing skills evaluated. METHODS A total of 109 students between 8 and 12 years old were divided into three groups. The control group consisted of 40 students fro...

Dichotic listening (DL) procedures are commonly employed in the evaluation of auditory processing in children. Review of the various clinical tests reveals considerable diversity in both the signals employed and their mode of administration. The extent to which other non auditory-specific factors influence the test outcome is often difficult to determine. Individual differences in memory, atten...

.........................................................................................................................................5 ACKNOWLEDGEMENTS .................................................................................................................7 1. ATTENTION.....................................................................................................................

Most of the studies I will be describing have been done with normal subjects, but I want first to review briefly some clinical studies which provide a background for the normal data. This work originated at the Montreal Neurological Institute while I was doing research, with Dr. Brenda Milner, on the functional differentiation of the right and left temporal lobes. One of the tests employed in i...

1. Introduction Since Broadbent (1954) [1] first conducted a dichotic listening task by simultaneously presenting a pair of similar speech sounds at each ear, many aspects of dichotic listening have been studied, including Kimura's early interpretation from a neurological point of view [2]. In a dichotic listening task, a right-ear advantage is often observed, because language processing takes ...