Biomaterial Database

Stimulus-dependent ear asymmetry in a dichotic monitoring task. 1992

L Jäncke

Department of Psychobiology and Psychocybernetics, Heinrich-Heine University, Düsseldorf, Federal Republic of Germany.

Auditory lateralization was investigated in 26 right-handed and 26 left-handed, normal subjects using two dichotic monitoring tasks in each proband [dichotic consonant-vowel (CV) syllable monitoring once with the syllable /ta/ and once with the syllable /da/ as target]. Subjects were instructed to monitor for the presence of a target CV which could occur in either ear. They responded by depressing a response button; reaction time (RT) and hit rates were recorded. In right-handers the syllable /ta/ presented to the right ear was detected more frequently, on the average, than presented to the left ear. Also, RT was shorter for detection of /ta/ in the right ear than for detection in the left ear for both right- and left-handers. The detection of /da/ showed no ear advantage in hit rate and RT either for right-handers or for left-handers. These results demonstrate the existence of a right-ear advantage in dichotic monitoring of the target syllable /ta/ but not for the target syllable /da/. This difference in evoking a right-ear advantage is attributed to a difference in the difficulty of detection of both targets. It is argued that the detection of /da/ is too difficult to evoke phonetic processing, leading to a right-ear advantage.

UI	MeSH Term	Description	Entries
D007839	Functional Laterality	Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot.	Ambidexterity,Behavioral Laterality,Handedness,Laterality of Motor Control,Mirror Writing,Laterality, Behavioral,Laterality, Functional,Mirror Writings,Motor Control Laterality,Writing, Mirror,Writings, Mirror
D008297	Male		Males
D010700	Phonetics	The science or study of speech sounds and their production, transmission, and reception, and their analysis, classification, and transcription. (Random House Unabridged Dictionary, 2d ed)	Speech Sounds,Sound, Speech,Sounds, Speech,Speech Sound
D011930	Reaction Time	The time from the onset of a stimulus until a response is observed.	Response Latency,Response Speed,Response Time,Latency, Response,Reaction Times,Response Latencies,Response Times,Speed, Response,Speeds, Response
D004007	Dichotic Listening Tests	Tests for central hearing disorders based on the competing message technique (binaural separation).	Dichotic Listening Test,Listening Test, Dichotic,Listening Tests, Dichotic,Test, Dichotic Listening,Tests, Dichotic Listening
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D013647	Task Performance and Analysis	The detailed examination of observable activity or behavior associated with the execution or completion of a required function or unit of work.	Critical Incident Technique,Critical Incident Technic,Task Performance,Task Performance, Analysis,Critical Incident Technics,Critical Incident Techniques,Incident Technic, Critical,Incident Technics, Critical,Incident Technique, Critical,Incident Techniques, Critical,Performance, Analysis Task,Performance, Task,Performances, Analysis Task,Performances, Task,Task Performances,Task Performances, Analysis,Technic, Critical Incident,Technics, Critical Incident,Technique, Critical Incident,Techniques, Critical Incident