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Topic: Dichotic listening

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	Jahrbuch-CD der MPG 2003 - Dichotic listening in patients
		Dichotic listening in patients with splenial and nonsplenial callosal lesions
		The authors found splenial lesions to be associated with left ear suppression in dichotic listening of consonant-vowel syllables.
		This was found in both a rapid presentation dichotic monitoring task and a standard dichotic listening task, ruling out attentional limitations in the processing of high stimulus loads as a confounding factor.
	www.mpg.de /forschungsergebnisse/wissVeroeffentlichungen/archivListenJahrbuch/2002/15/publZIM101.html (154 words)

	Conferencias (Site not responding. Last check: 2007-10-16)
		The dichotic listening method is presented from a historical perspective, followed by an outline of the empirical procedure used in our laboratory.
		A major argument in the present paper is that the dichotic listening technique is a method to study the interaction between bottom-up, or stimulus-driven, versus top-down, or instruction-driven laterality.
		Dichotic listening literally mean presenting two auditory stimuli simultaneously, and the standard experiment requires that the subject report after each trial which of the two stimuli he/she perceived best.
	www.uninet.edu /union99/congress/04Hugdahl.html (4660 words)

	SparkNotes: Attention: Channels
		They must listen carefully to one of the voices and repeat each word that it says as the words are spoken, a task called shadowing.
		Broadbent, a researcher who performed some of the first dichotic listening experiments, theorized that our mind can be conceived as a radio receiving many channels at once.
		So, you can listen to the friend channel for a few seconds, and then you can switch to the Oprah channel and retrieve her last few words from sensory store.
	www.sparknotes.com /psychology/cognitive/attention/section1.html (768 words)

	Cerebral Specialization and Lateralization Down Syndrome Abstracts
		In the present study, a recent adaptation of the dichotic listening procedure was employed to examine interhemispheric integration during the performance of a lateralized verbal-motor task.
		Based on a comparison of the laterality indices obtained from both dichotic listening procedures, it appears that the manifestation of lateral ear advantages in persons DS may dependent on the response requirements of the task.
		Although dichotic listening studies seem to indicate that individuals with Down syndrome are more likely than those without Down syndrome to display a left ear/right hemisphere advantage for speech sounds, evidence from other experimental paradigms makes a simple model of reversed cerebral specialization for individuals with Down syndrome untenable.
	www.altonweb.com /cs/downsyndrome/lateralityab.html (2167 words)

	Dichotic (Site not responding. Last check: 2007-10-16)
		This site lets you try a dichotic listening experiment to test the side of your brain that is dominant for language processing.
		A series of studies on the use of dichotic listening as a method to study brain-behavior...
		The dichotic listening method is presented from a...
	www.musicbyartist.com /Dichotic.html (540 words)

	[No title]
		One uses auditory input to the brain and is termed the dichotic listening procedure.
		Dichotic listening was first introduced by Broadbent (1954) and used by Kimura (1961a, 1961b) as a procedure for studying laterality effects.
		The research participant's task is to listen to the 30 CV pairs in sequence, though the order is randomized for each participant.
	psychexps.olemiss.edu /InstrOnly_Page/dichotic.htm (885 words)

	Relationship between the Aviation Selection Test and a Psychomotor Battery
		They are the stick (S) task, the dichotic listening task (DLT), the S and DLT simultaneously, the S and rudder task (SR), the SRDLT, the SR and throttle task (SRT), a horizontal tracking task (HT), and absolute difference task (AD), and the MANIKIN test.
		DLT is purely a dichotic listening task and SDLT and SRDLT are multi-tasks that contain components of dichotic listening as well.
		The tracking and the dichotic listening tasks are similar to the real world environment of the aviator and do not seem to have common factors in association with the paper-and pencil ASTB.
	www.internationalmta.org /1998/9803.html (1361 words)

	PSP 2005
		One of the main advantages of using a dichotic listening task to investigate hemispheric lateralisation to auditory stimuli is that since there is ipsilateral suppression of the auditory pathways (Bryden, 1988), any lateralised response is more pronounced.
		Dichotic listening tasks using speech sounds have often shown a right-ear advantage, indicating left-hemisphere dominance (Schwartz and Tallal, 1980).
		The aim of this study was to investigate the extent of left and right hemisphere contribution to MMN strength, for both meaningful words and meaningless pseudowords, using a dichotic presentation.
	www.phon.ucl.ac.uk /psp/full_abstracts_get.php?Abstract_option=255 (288 words)

	American Auditory Society
		All children demonstrated greater activation during dichotic listening than during any other listening task with preferential activation in the transverse temporal gyrus of the right hemisphere and the superior temporal gyrus of the left hemisphere.
		Listeners were 14 7-9-month-olds and 19 young adults, healthy and without risk factors for hearing loss, tested using an observer-based behavioral procedure.
		Listening problems were operationally defined as (1) parental concern about listening abilities and (2) poor performance on at least one of five behavioral measures conventionally used to evaluate aspects of auditory processing.
	www.amauditorysoc.org /pages/abstracts/2004/podiumsessions-tues.html (5298 words)

	Tramadol, buy tramadol, antibiotics, Weight Loss drugs, weight loss herbs, weight loss herbal formula, hair loss, hair ... (Site not responding. Last check: 2007-10-16)
		In the present investigation, the dichotic word listening performance of a sample of 25 dysphoric neuropsychiatric patients who endorsed multiple partial seizure-like symptoms was compared with that of matched samples of normal controls and patients with mood disorders who did not endorse multiple seizure-like symptoms.
		Eighty percent of the patients who endorsed multiple episodic phenomena failed the dichotic listening task, compared with 8% of normal controls and 28% of patients with typical mood disorders.
		Because it is sensitive to this type of presumed cerebral dysfunction and relatively specific, impaired dichotic listening performance is likely to be a useful clinical marker for this complex neuropsychiatric syndrome.
	www.darwinpharmacy.com /ref-anxiety-004/anxiety-004-research-abs3.173.html (591 words)

	EAR-DOMINANCE FOR PITCH STIMULI USING INTERTONE METHODS AND UNTRAINED LISTENERS
		regarding ear-dominance to pitch stimuli was reinvestigated using the same dichotic "intertone" technique, but with subjects inexperienced in the dichotic listening technique.
		Her systematic work using the dichotic listening method gave scientific reason to believe in a vague idea that the left hemisphere is more efficient for tasks involving analysis, such as speech, and the right hemisphere is more efficient for tasks more heuristic, such as music listening.
		The listener hears the 320 ms stimulus and then 500 ms later binaurally hears a single second tone 320 ms in duration initially at the center frequency.
	ccrma-www.stanford.edu /~sturm/eardom.htm (1857 words)

	SCAN-C (Test for Auditory Processing Disorders In Children-Revised)
		The last two, Competing Words and Competing Sentences, are dichotic listening tests in which different words or sentences are presented simultaneously, one to each ear.
		As a directed listening task the child is instructed to repeat both words, repeating the word heard in the right ear first.
		The Competing Sentences subtest also consists of a directed ear listening task, but in this case the child is instructed to direct attention to the stimuli presented in one ear, while ignoring stimuli presented to the other ear.
	www.capdtest.com /scan_c.cfm (1057 words)

	Listening
		Covert listening device A 'bug' is the common name for a covert listening device, usually a combination of a miniature...
		Dichotic listening Dichotic Listening is a procedure used commonly in investigating selective attention in the auditory...
		Time spent listening Time spent listening (TSL) is one of the measurements surveyed by Arbitron in determining ratings...
	www.brainyencyclopedia.com /topics/listening.html (79 words)

	Detection and direction-discrimination of diotic and dichotic ramp modulations in amplitude and phase. (Site not responding. Last check: 2007-10-16)
		When the source of a tone moves with respect to a listeners ears, dichotic (or interaural) phase and amplitude modulations (PM and AM) are produced.
		Dichotic PM discrimination thresholds were similar to detection thresholds.
		Sensitivity to dichotic AM and PM, and diotic AM increased as duration was increased from 20 ms to 200 ms.
	www.accelerated-learning-online.com /research/detection-direction-discrimination-diotic-dichotic-ramp-modulations.asp (575 words)

	Attentional and executive dysfunctions in schizophrenia and depression: evidence from dichotic listening performance. (Site not responding. Last check: 2007-10-16)
		They were tested with a consonant-vowel syllables dichotic listening task under three attentional instructions.
		Functional brain asymmetry and attentional modulation in young and stabilised schizophrenic patients: a dichotic listening study.
		Replication of a premenstrual decrease in right-ear advantage on language-related dichotic listening tests of cerebral laterality.
	www.accelerated-learning-online.com /research/attentional-executive-dysfunctions-schizophrenia-depression-evidence.asp (590 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		Studies of dichotic listening in normal adults have consistently shown that the right hemisphere is superior to the left hemisphere in the perception of emotions conveyed by prosody patterns.
		Example of dichotic pairing.Each stimulus was limited monaurally to either the left or right channel, then paired with another stimulus limited to the opposite channel in order to create a dichotic pair.
		Dichotic pairs were separated into 48 stimuli for emotion and 36 for syntax.
	students.washington.edu /mstonega/home_files/emotax.doc.doc (2750 words)

	BruDer - MoinMap (Site not responding. Last check: 2007-10-16)
		In dichotic tests, paired stimuli (two different words or two different tones) are simultaneously presented to the two ears, and the difference in perceiving the stimulus in the right and left ear provides an index of perceptual asymmetry.
		The present study was designed to overcome these limitations by assessing dichotic listening measures of lateralized cognitive processing in groups of patients with social phobia alone, with a depressive disorder alone, or with comorbidity of social phobia and a depressive disorder.
		A factorial design with two grouping factors was used to contrast the dichotic listening performance of subjects with versus without social phobia as one factor and subjects with versus without a depressive disorder as the second factor.
	collord.net /moinmap/BruDer (4678 words)

	Focused attention in a simple dichotic listening task: an fMRI experiment. (Site not responding. Last check: 2007-10-16)
		Three different dichotic listening tasks were used: the subjects were instructed to either concentrate on the stimuli presented in both ears (DIV), or only in the left (FL) or right (FR) ear and to monitor the auditory input for a specific target tone.
		Thus, it is clear that dichotic listening makes use of various cognitive functions located within the dorsal and ventral stream of auditory information processing (i.e., the 'what' and 'where' streams).
		These findings were taken as evidence that even a simple dichotic listening task such as the one used here, makes use of a distributed neural network comprising of the dorsal and ventral stream of auditory information processing.
	www.accelerated-learning-online.com /research/focused-attention-simple-dichotic-listening-task-fmri-experiment.asp (710 words)

	Dichotic time compression and spatialization (Site not responding. Last check: 2007-10-16)
		One technique for increasing listening capacity is by time compressing an auditory signal--to play back an audio recording in less time than it took to record.
		The dichotic speech sounds a bit annoying at first, as most listeners switched attention between their ears, but this unusual sensation became less noticeable over time.
		These two-eared presentation styles can be used to (1) increase the time efficiency of the listener, (2) increase the intelligibility and comprehension of the material, or (3) a combination of the two.
	xenia.media.mit.edu /~barons/icad94.html (2757 words)

	Dichotic listening and manual performance in relation to magnetic resonance imaging after closed head injury -- Levin ...
		Dichotic listening and manual performance in relation to magnetic resonance imaging after closed head injury -- Levin et al.
		Dichotic listening and manual performance in relation to magnetic resonance imaging after closed head injury
		dichotic listening and intermanual tasks were administered to 69 patients
	jnnp.bmjjournals.com /cgi/content/abstract/52/10/1162 (245 words)

	WOBIB: 14 - Hugdahl, et al. (2000) Effects of attention ... (Site not responding. Last check: 2007-10-16)
		The present study investigated the effect of attention on brain activation in a dichotic listening situation.
		Dichotic listening is a technique to study laterality effects in the auditory sensory modality.
		Twelve subjects listened to lists of consonant-vowel syllables, or short musical instrument passages, with the task of detecting a "target" syllable or musical instrument by pressing a button.
	hendrix.imm.dtu.dk /services/jerne/brede/WOBIB_14.html (1145 words)

	Interesting dichotic effect (Mitchell Sommers ) (Site not responding. Last check: 2007-10-16)
		In the course of calibrating headphones for a = dichotic listening task, we generated stimuli consisting of two pure = tones.
		That is, stimuli 1 and 2 presented = dichotically, should sound identical to stimuli 3 and 4 presented = dichotically because the spectral content is the same, we just switched = the ear to which each was presented.
		Interestingly of 4 listeners 2 perceived a = decrease in pitch and 2 perceived an increase (i.e., when 3 and 4 were = presented dichotically after hearing 1 and 2, there was either a = decrease or increase in pitch).
	www.auditory.org /postings/2001/57.html (358 words)

	NFI søk: litteratur: Dichotic listening studies of brain asymmetry in brain damaged patients. (Site not responding. Last check: 2007-10-16)
		NFI søk: litteratur: Dichotic listening studies of brain asymmetry in brain damaged patients.
		Dichotic listening studies of brain asymmetry in brain damaged patients.
		Kenneth Hugdahl, Knut Wester: Dichotic listening studies of brain asymmetry in brain damaged patients.
	dbh.nsd.uib.no /nfi/litteratur/?key=338666 (82 words)

	Re: Interesting dichotic effect ("Jesteadt, Walt" ) (Site not responding. Last check: 2007-10-16)
		In the course of calibrating headphones for a dichotic listening task, we generated stimuli consisting of two pure tones.
		That is, stimuli 1 and 2 presented dichotically, should sound identical to stimuli 3 and 4 presented dichotically because the spectral content is the same, we just switched the ear to which each was presented.
		Interestingly of 4 listeners 2 perceived a decrease in pitch and 2 perceived an increase (i.e., when 3 and 4 were presented dichotically after hearing 1 and 2, there was either a decrease or increase in pitch).
	www.auditory.org /postings/2001/61.html (391 words)

	Differential effects of congenital versus acquired unilateral brain injury on dichotic listening performance: evidence ... (Site not responding. Last check: 2007-10-16)
		We assessed dichotic speech and complex-pitch discrimination in nine young patients with unilateral left-hemisphere injury and eight young patients with unilateral right-hemisphere injury incurred in the pre-perinatal (congenital) period.
		These results indicate that although congenital damage produces a "lesion effect" in dichotic listening similar to that after damage acquired in adulthood, overall function is relatively spared.
		To the extent that complex-pitch discrimination is affected by congenital damage to either hemisphere but speech discrimination is not, the present results are consistent with an asymmetric form of crowding during reorganization after congenital unilateral brain damage.
	www.arclab.org /medlineupdates/abstract_1407579.html (222 words)

	Dichotic Listening before and after Fluoxetine Treatment for Major Depression: Relations of Laterality to Therapeutic ... (Site not responding. Last check: 2007-10-16)
		Studies have suggested the possible value of dichotic listening measures of perceptual asymmetry (PA) as predictors of treatment response.
		As part of a multisite study, 86 outpatients with major depression were tested on dichotic fused-words and complex-tones tests both before and during treatment.
		Findings from two clinical centers support the hypothesis that a characteristic tendency for relatively greater left-than right-hemispheric activation during dichotic listening is associated with better outcome of fluoxetine treatment.
	www.nature.com /cgi-taf/dynapage.taf?file=/npp/journal/v15/n2/abs/1380459a.html (309 words)

	template (Site not responding. Last check: 2007-10-16)
		The dichotic listening (DL) technique is frequently used as a tool for the study of hemispheric function in normal subjects and brain-lesioned patients.
		In dichotic listening, two similar, but not identical, sounds are presented, one to each ear.
		Numerous studies have shown that under dichotic listening conditions, lexical material, such as words or consonant-vowel (CV) syllables, is detected more easily in the right ear in subjects with a language-dominant left hemisphere (for an overview, cf.
	www.cbru.helsinki.fi /hscn2001/hugdahl.html (244 words)

	dichotic method (Site not responding. Last check: 2007-10-16)
		Dichotic listening refers to a technique used in the psychology laboratory, whereby a person wearing headphones hears different messages in the left and right ear.
		The technique has been used with some success in teaching foreign language words - the foreign word is heard in the right ear while simultaneously the native translation is heard in the left ear (most people process speech better in the right ear).
		Permission is granted to copy and distribute this material in educational settings, provided that the author is advised and due acknowledgment is made of the source on any handouts.
	www.memory-key.com /Language/dichotic.htm (161 words)

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