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At least 19 recordsLinked to original sources
PubMed1990

[Effects of unilateral temporal lobectomy on verbal dichotic listening test].

Verbal dichotic listening test was conducted before and after anterior temporal lobectomy on 25 patients who underwent the operation because of their medication-resistant epileptic seizures. Their speech dominance by Wada test was all left sided. 1. Preoperatively, patients having the epileptogenic focus in the right temporal lobe (R-TLE) and those having the focus in the left (L-TLE) were, as expected, all right-ear dominant. The mean number of correct responses was fewer in L-TLE than in R-TLE group. 2. Postoperatively, no detrimental effects for recognition of verbal auditory stimuli by the ear contralateral to the focus was observed both in L-TLE and in R-TLE group. 3. Postoperatively, the ear-dominance shifted: to the left in patients with L-TLE, and to the right more conspicuously in patients with R-TLE compared to the preoperative scores. In other words, the recognition ability by the ears ipsilateral to the side of focus, or of resected temporal lobe, was ameliorated. Summarizing, the unilateral anterior temporal lobectomy did not cause "lesion effect" but yielded improvement of verbal auditory recognition by ears ipsilateral to the epileptogenic focus. Diminished epileptic bombardment resulted in by the resection surgery may be a possible explanation.

Adult↗
PubMed1979

[Neuropsychological studies of two subjects after the transection of the splenium of the corpus callosum. (Part 2. The auditory recognition by the dichotic listening test) (author's transl)].

We made the neuropsychological auditory studies of two right-handed subjects who had undergone the transection of the splenium of the corpus callosum for the pineal operation (the teratoma by the histopathological examination). The transection grades were 2.0 cm and 2.5 cm. The truncus and splenium of the second subject were flat by the compression of the tumor. We examined these subjects by the some audiolocigal methods. 1. Pure tone audiometry. 2. Fixed frequency Békésy audiometry. 3. SISI test (short increment sensitivity index test). 4. Speech audiometry. 5. Distorted speech test (filtered speech test). 6. Binaural fusion test. 7. Dichotic listening test. The tasks used for the dichotic listening test were following. Different digits (one pair, three pairs), different words (from two to four syllables) and different vowels and consonants were presented simultaneously to the two ears by means of a dual-channel tape recorder with stereophonic earphone. The result shows that the first subject (whose section of the spelenium was 2.0 cm) shows a slight but not significant superiority on the right ear to the one pair digits and words (p less than 0.1), and the second subject (whose section of the splenium was 2.5 cm and whose splenium and truncus of the corpus callusum were flatten by the compression of the tumor) shows a significant superiority on the right ear to the one pair digits, words, three pairs digits and vowels (p less than 0.05). But there was no definitive abnormalities at the pure tone audiometry, the fixed frequency Békésy audiometry, SISI test, distorted speech test and binaural fusion test of two cases. The result shows that the commissure fibres of the auditory perception of the speech of two hemispheres connect through from splenium to the truncus of the corpus callosum.

Brain Neoplasms↗
PubMed1986

Hand, foot, eye and ear preferences and performance on a dichotic listening test.

Normal adult men and women were given a dichotic listening test to determine ear advantage. On the basis of a lateral preference questionnaire, subjects were classified as to handedness, footedness, eyedness, earedness and overall congruency across lateral preferences. Ear preference was the most successful variable in predicting ear advantage on the dichotic listening test.

Adult↗
PubMed1983

Item analysis of a single response dichotic listening test.

Ten left-handed and eight right-handed subjects were tested on five replications of a single-response dichotic listening test. Nine CV dichotic pairings of the six stop consonants plus /a/ were used. Computer synthesis guaranteed that these pairs differed on only a single phonemic feature, thus permitting fusion. Mean laterality scores were significantly higher (greater right ear advantage) for right-handers than for left-handers. Selective attention instructions did not alter laterality scores. Test-retest correlation coefficients were consistently high (greater than .70 for all adjacent replication comparisons). Error rates were low (averaging 5.5%) and 39% of these were psychoacoustic confusions rather than true (guessing) errors. These confusions were found for only two of the nine pairs. Stimulus dominance, as opposed to ear dominance, was considered separately. Two dichotic pairs had such strong stimulus dominance for all subjects that little ear advantage information was available from those pairs. It was recommended that the three dichotic pairs prone to psychoacoustic confusions and/or overwhelming stimulus dominance be removed from the test.

Dominance, Cerebral↗
PubMed1995

Significance of unilateral ear extinction on the dichotic listening test.

The association between unilateral ear extinction on the dichotic listening test and the lateralization of epileptogenic foci was examined in a sample of 49 seizure patients undergoing preoperative evaluation for epilepsy surgery. Results from patients who were left hemisphere dominant for speech indicated that right ear impairment was always predictive of a unilateral left hemisphere focus, but left ear extinction was associated with unilateral lesions of either hemisphere. In this patient sample, dichotic listening performance reflected an interaction of both lateralized foci and hemispheric preference of language processing. Implications concerning clinical use of the dichotic listening test are discussed.

Adolescent↗
PubMed2002

Interaural asymmetries revealed by dichotic listening tests in normal and dyslexic children.

Normal and dyslexic right-handed children were assessed with three dichotic listening tests, the Dichotic Digits test, the Competing Words subtest of the SCAN, and the Dichotic Consonant-Vowel test. Performance was measured as both number and percentage of correct responses in the right and left ears. Laterality was defined as a simple difference in percentage between the two ears. Differences across the tests were revealed for all children, with the greatest differences occurring for left-ear responses. Only one dichotic listening test, Competing Words from the SCAN, produced a consistent right-ear advantage across all of the children tested. Between groups of children, differences in performance and in laterality were demonstrated. Using a criterion of poorer than 76 percent correct for the left ear, the Competing Words subtest of the SCAN identified 7 of the 10 dyslexic children as abnormal, with no false alarms in the control group.

Auditory Perceptual Disorders↗
PubMedDate not supplied

[Dichotic listening test in Spanish: pairs of disyllabic words].

INTRODUCTION AND AIMS: Spanish dichotic listening tests make use of either monosyllabic words or single syllables. Here we present a dichotic listening test with 19 pairs of two-syllable words, since this type of words is more in accordance with the syllabic structure of the Spanish language. SUBJECTS AND METHODS: The test was applied to a total of 164 psychology students. Two studies were carried out--one exploratory and the other to obtain test-retest reliability. Responses were obtained with a distinction being made between four visual distractors. In the first study, up to two of the four alternatives could be chosen. In the second study, a single response was imposed and the test was performed twice with a gap of 15 days between sessions. RESULTS: Significant right ear advantage was observed both in the first study (t(39) = -9.57, p < 0.0001) and in the second (t(37) = -11.75, p < 0.0001). When the sample was separated into right-handed and left-handed subjects, significant differences between their medians were obtained in the first study with respect to the laterality index (t(14) = 2.23, p < 0.04). The test-retest correlation was found to be highly significant (r = 0.88, p < 0.0001). CONCLUSIONS: The present test appears to be a good indicator of laterality and we have implemented a computer program that allows us to modify the time intervals between pairs of stimuli and to obtain the laterality indexes automatically. Thus, the test can be used in a wide range of clinical populations.

Adult↗
PubMedDate not supplied

Relationship between two dichotic listening tests and the Token test for children.

The relationship between two dichotic listening tasks was studied. The two dichotic tests used were the Staggered Spondaic Word (SSW) test and the directed Dichotic Consonant-Vowel (CV) test. These measures were administered to 104 children between the ages of 6.0 and 8.0 yrs. The subjects were divided into two groups according to their Token test scores with group I having normal Token test scores and group II having below average scores on the Token test. When the performances of the two groups on the SSW test were compared, a significant difference was found between them on the right and left competing conditions of the test. There was no difference between the groups on any response bias. On the directed Dichotic CV test the two groups were significantly different on the right ear scores but not on the left ear scores under both directed conditions. The groups were also significantly different on the directed right task when the difference between the two ear scores was compared but not on the directed left task. It was concluded that there is a relationship between these two dichotic measures and the Token Test for Children.

Auditory Pathways↗
PubMedDate not supplied

[The dichotic listening test in the determination of cerebral dominance in normal subjects (author's transl)].

The dichotic listening test is supposed to produce lateral differences in performance that would be in relationship with the functional asymmetry of the brain. Although the existence of this relationship is beyond doubt, the review of the literature shows that it may be affected by many uncontrolled factors and that cerebral dominance in normal people cannot be predicted on the basis of the test of dichotic listening. Some attempts to identify those uncontrolled factors are examined here. It appears, in addition, that the main contribution of the structural interpretation of the auditory laterality effect is that it provided a description of the neural course of auditory information. Regarding the hypotheses that inferiority of one ear would be due either to a delay in reaching the processing centers, or to a loss of information as a consequence of a longer pathway, it is claimed that the first is inconsistent with some empirical data and the second is, until now, entirely speculative.

Auditory Perception↗
PubMed1990

[Development of the right ear advantage in dichotic listening test: comparison of the findings by cross-sectional and longitudinal studies].

The right ear advantage in dichotic listening test for VCV word pairs was investigated using both longitudinal and cross-sectional methods with children whose age ranged from four to six. The degree of a right ear advantage and the population of those who showed a right ear advantage increased with age in the cross-sectional method. In the longitudinal method, however, the above findings could not be confirmed. These results suggest that the application of dichotic listening test may be inappropriate to young children.

Age Factors↗
PubMed1983

Peripheral hearing loss: implications for clinical dichotic listening tests.

This experiment assessed the extent to which a peripheral hearing loss may confound interpretation of dichotic listening test results in assessment of central auditory deficit. A normal-hearing listener was tested monotically and dichotically with CV nonsense syllables in two conditions. In one, an EAR plug was inserted in the auditory canal to simulate a unilateral conductive hearing loss. In the second, no plus was inserted. Syllables were presented with equal intensity to the two ears for dichotic testing and testing was conducted at several different intensities. With the plug inserted, both magnitude and direction of percent ear advantage varied with test intensity even when monotic speech recognition scores exceeded 95% for both ears. When dichotic tests are used to assess central auditory deficit in patients with peripheral hearing loss, we recommend that the test intensity be at least 10 dB from both the lower and upper knees of monotic performance-intensity functions.

Dichotic Listening Tests↗
PubMed1982

[Tachistoscope and dichotic listening test of the subject after the transection of the posterior part of the corpus callosum].

The authors made neuropsychological studies by the tachistoscope and the dichotic listening test on a subject who had undergone the transection of the posterior part of the corpus callosum. As to the tachistoscopic recognition, stimulus material was composed with the various Japanese letters (Katakana, Hiragana, Kanji), various faces (variations of the eyebrow form and the mouth form) and various slopes of line. Table 1 shows results of the cases (the subject was the present case, subjects 1 and subject 2 were past cases). It was seen that the performance of the subject on Japanese letters tasks showed greater right visual field superiority than the one of subject 1 and subject 2. As to the auditory recognition, the tasks used for the dichotic listening test were the following (Table 2, 3, 4). Different digits (three pairs) of the subject showed greater right ear superiority (right ear: 61.1, left ear 5.9) than the ones of subject 1 and subject 2.

Brain Neoplasms↗
PubMed2000

Test-retest performance for the consonant-vowel dichotic listening test with and without attentional manipulations.

The present work aimed to replicate Hugdahl and Hammar's (1997) study on the reliability of dichotic listening under divided or focused attention conditions. With the same consonant-vowel syllable dichotic listening procedure, 16 subjects were tested twice, 2 weeks apart. The design included a condition without attentional instructions (nonforced) and two conditions with the instruction to attend either to the right- or the left-ear input. The results showed a significant correlation coefficient of.82 for the standard nonforced condition, indicating temporal stability for the ear advantages. There were also high correlation coefficients for the focused attention conditions (.77 and.76), although the subjects performed the attentional instructions more accurately in session two.

Adult↗
PubMed1985

[Cerebral activation during pursuit eye movements: localization by the dichotic listening test].

The level of cerebral hemispheres activation is studied here during pursuit eye movement by means of a dichotic listening test. Visual pursuit, whatever the direction, clearly activates the right hemisphere; this is probably related to the phenomenon of attention. Each hemisphere is activated by contralateral pursuit eye movement, which suggests that each hemisphere plays a role in pursuit eye movement towards that direction.

Adult↗
PubMed2004

[Abnormal findings of dichotic listening test in patients with childhood adrenoleukodystrophy].

Ten Japanese boys with childhood-onset adrenoleukoqdystrophy (ALD) were evaluated with dichotic listening test (DLT). Six cases showed abnormal findings especially of laterality index (L.I.) calculated from the score of each ear. Some of them showed no abnormal findings with other auditory examinations containing auditory brainstem responses (ABR). One patient showed abnormal L.I. of DLT at an early stage. The abnormality of laterality index was similar to the so-called "strong left-ear suppression" in patients who underwent callosotomy. Although all of these six patients had a high signal lesion at the splenium of the corpus callosum in a T3-weighted MRI sequence, it was difficult to evaluate the width of demyelinated area. DLT could detect the early damage of connecting fibers mediating inter-hemispheric transfer of auditory information, and might be a useful method for evaluating the cerebral function of auditory processing in patients with childhood ALD.

Adolescent↗
PubMed1998

[New interactive verbal dichotic listening test].

INTRODUCTION AND OBJECTIVE: From the multimedia technology and of the digital recording of the voice, we have redesigned the verbal dichotic listening test. The recognition of 15 monosyllabic word pairs offered though some earphones is presented in an interactive program. METHODS: Using the mouse button, the subject decides the moment in which each stimuli coupe will take place. Likewise, the screen displays 10 words, among which you have to recognize the words supplied by the earphones. Finally, the program results in complete right answers and right answers cross or referred to the opposite ear. RESULTS: Applied the test to a sample of 92 subjects, apparently normal, with a middle and high cultural level, from among 19 and 60 years (44 females and 48 males), the test resulted in a predominance of rights answers in the right ear (p < 0.0064). Separated the sample in in left-handed and right-handed men (67 right handed and 25 left-handed), it hasn't been found meaningful differences among their averages. Separated the sample by sex, the differences among the slightly meaningful averages (p < 0.04, according to the Student's t test). CONCLUSIONS: The test is offered as a resource appropriate for laterality studies, and for differential disorder study of gnosias and praxias of the dyslexias of aphasias, hearing aids, multiple sclerosis, and aptitudes studies.

Adult↗
PubMed2001

[Assessment of the Dichotic Listening Test by Feldmann in children with developmental reading and spelling disorders].

In Germany the dD by Feldmann is a frequently used test in child assessment. Unknown, however, is the validity of the dD in the assessment of children with specific developmental language disorders. The dD by Feldmann are pairs of three-syllable content words which are presented dichotically. In this controlled cross-sectional study 65 children took the dichotic listening test by Feldmann (dD). The experimental group comprised 34 children with developmental reading and spelling disorders. The control group comprised 31 children with normal reading and spelling development. Age and nonverbal IQ were matched in both groups. The mean age was 9.8 years (range 7 - 11 years). The dichotic listening performance of right and left ear was registered separately. Twenty word pairs were presented dichotically at a constant amplitude of 65 dB. Memorisation of word pairs was tested under free recall conditions. A score of 100 % can be attained, if all word pairs are repeated correctly. Results demonstrated that no child attained a score of 100 %. As expected, the children with the developmental reading and spelling disorders attained significantly lower scores than the children in the control group (42.4 % versus 64 %). The reason for the lower results in the experimental group was left ear dichotic listening performance. There were no significant differences in right dichotic listening performance. Raw score overlaps occurred to some extent in both groups, but scores of 30 % or less were only observed in the experimental group. Scores correlated significantly with age, but not with nonverbal IQ. However, dD performance significantly correlated with several measures of phonological and syntactic language development as well as with auditory working memory. Based on these results it is our opinion that performance scores of the dD by Feldmann should be interpreted cautiously until validation studies have been carried out.

Agraphia↗