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Evaluation of a cognitive test battery in young and elderly normal-hearing and hearing-impaired persons
Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
Linköping University, Department of Behavioural Sciences and Learning. Linköping University, Faculty of Arts and Sciences. Östergötlands Läns Landsting, Reconstruction Centre, Department of ENT - Head and Neck Surgery UHL.
Linköping University, Department of Clinical and Experimental Medicine, Oto-Rhiono-Laryngology and Head & Neck Surgery . Linköping University, Faculty of Health Sciences.
2001 (English)In: Journal of the American Academy of Audiology, ISSN 1050-0545, Vol. 12, no 7, 357-370 p.Article in journal (Refereed) Published
Abstract [en]

A cognitive test battery sensitive to processes important for speech understanding was developed and investigated. Test stimuli are presented as text or in an auditory or audiovisual modality. The tests investigate phonologic processing and verbal information processing. Four subject groups, young/elderly with normal-hearing and young/elderly with hearing impairment, each including 12 subjects, participated in the study. The only significant effect in the text modality was an age effect in the speed of performance, seen also in the auditory and audiovisual modalities. In the auditory and audiovisual modalities, the effects of hearing status and modality were seen in accuracy parameters. Interactions between hearing status and modality, both in accuracy and in reaction times, show that hearing-impaired subjects have difficulties without visual cues. Performing the test battery in noise made the tasks more difficult, especially in the auditory modality and for the elderly, affecting both accuracy and speed. Test-retest measurements showed learning effects and a modality-dependent variability. The test battery has proven useful in assessing the relative contribution of different input signals and the effects of age, hearing impairment, and visual contribution on functions important for speech processing.

Place, publisher, year, edition, pages
2001. Vol. 12, no 7, 357-370 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-13585OAI: oai:DiVA.org:liu-13585DiVA: diva2:20990
Available from: 2005-05-28 Created: 2005-05-28 Last updated: 2013-11-13
In thesis
1. Hearing and cognition in speech comprehension. Methods and applications
Open this publication in new window or tab >>Hearing and cognition in speech comprehension. Methods and applications
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Central auditory processing is complex and can not be evaluated by a single method. This thesis focuses on assessment of some aspects of central auditory functions by the use of dichotic speech tests and cognitive tests that tax functions important for speech processing.

Paper A deals with the cognitive effects in dichotic speech testing in elderly hearing-impaired subjects. It was found that different listening tasks in the dichotic tests put different demands on cognitive ability, shown by a varying degree of correlation between cognitive functions and dichotic test parameters. Age-related cognitive decline was strongly connected with problems to perceive stimuli presented to the left ear.

Paper B presents a new cognitive test battery sensitive for functions important for speech processing and understanding, performed in text, auditory and audiovisual modalities. The test battery was evaluated in four groups, differing in age and hearing status, and has proven to be useful in assessing the relative contribution of different input-modalities and the effect of age, hearingimpairment and visual contribution on functions important for speech processing.

In Paper C the test battery developed in Paper B was used to study listening situations with different kinds of background noise. Interfering noise at +10 dB signal-to-noise ratio has significant negative effects on performance in speech processing tasks and on the effort perceived. Hearing-impaired subjects showed poorer results in noise with temporal variations, and elderly subjects were more distracted by noise with temporal variations, especially by noise with meaningful content. In noise, all subjects, particularly those with impaired hearing, were more dependent upon visual cues than in the quiet condition.

Hearing aid benefit in speech processing with and without background noise was studied in Paper D. The test battery developed in Paper B was used together with a standard measure of speech recognition. With hearing aids, speech recognition was improved in the background condition without noise and in the background condition of ordinary speech. Significantly less effort was perceived in the cognitive tests when hearing aids were used, although only minor benefits of hearing aid amplification were seen. This underlines the importance of considering perceived effort as a dimension when evaluating hearing aid benefit, in further research as well as in clinical practice.

The results from the studies contribute to the knowledge about speech processing but also to the search for more specific evaluation of speech understanding, incorporating both sensory and cognitive factors.

Place, publisher, year, edition, pages
Linköping: Institutionen för nervsystem och rörelseorgan, 2005. 37 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 927Linköping University Medical Dissertations, ISSN 0345-0082 ; 888Studies from the Swedish Institute for Disability Research, ISSN 1650-1128 ; 14
Keyword
Aging, physiology, cognition, cognition disorders, dichotic listening tests, hearing loss, sensorineural, neuropsychological tests, speech perception
National Category
Otorhinolaryngology
Identifiers
urn:nbn:se:liu:diva-5039 (URN)91-85297-93-3 (ISBN)
Public defence
2005-04-22, Elsa Brändströms föreläsningssal, Hälsouniversitetet, Campus US, Linköpings universitet, Linköping, 13:00 (English)
Opponent
Supervisors
Note
The ISBN 91-85297-49-6 in the printed verison is incorrect. The correct ISBN is 91-85297-93-3.Available from: 2005-05-28 Created: 2005-05-28 Last updated: 2010-01-13Bibliographically approved
2. Assessment of central auditory functions: methods and applications
Open this publication in new window or tab >>Assessment of central auditory functions: methods and applications
2001 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Central auditory processing is complex and can not be completely evaluated by a single method. This thesis focuses on assessment of some aspects of central auditory functions by the use of dichotic speech tests, cognitive tests that tax functions important for speech processing and electrophysiological tests.

Paper A deals with the cognitive effects in dichotic speech testing in elderly hearing impaired subjects. Dichotic speech tests and cognitive tests were performed on 30 hearing impaired subjects ranging in age from 42 to 84 years. The dichotic test material consisted of digits, short sentences and consonant-vowel-syllables. The cognitive test material comprised tests for short-term memory, verbal information processing and phonological processing. Effects of age in dichotic speech tests in elderly were verified. The degree of effect was dependent upon focusing condition and test material. The different listening tasks in the dichotic tests put different demands on cognitive ability, shown by a varying degree of correlation between cognitive functions and dichotic test parameters. Age-related cognitive decline in the elderly was strongly connected with problems to perceive stimuli presented to the left ear.

Paper B presents a new cognitive test battery, performed in text, auditory and audiovisual modalities. The tests are sensitive for functions important for speech processing and understanding. The test battery was evaluated in four groups, differing in age and hearing status. Each group comprised twelve subjects. The effect of low-level noise on cognitive functions was investigated. The only significant result in the text modality was an age effect in speed of performance, which was also seen in the auditory and audiovisual modalities. In the auditory and audiovisual modalities effects of hearing status and modality were seen in accuracy parameters. Interaction between hearing status and modality, both in accuracy and speed of performance, shows that hearing-impaired subjects benefit more from visual cues. In noise generally poorer results were obtained, especially in the auditory modality and for the elderly, affecting both accuracy and speed. The test battery has proven to be useful in assessing the relative contribution of different input-modalities and the effect of age, hearing-impairment and visual contribution on functions important for speech processing.

Paper C describes the development of a system for recording of auditory evoked potentials. The system is built around a personal computer with a data-acquisition board with analogue input and output channels. Acoustic stimuli are presented to the test subject and responses to the acoustic stimuli are recorded in an EEG-recording system. The program is written in the graphical programming environment LabView (National Instruments). With the system it is possible to perform all clinical standard measurements. In addition, test-procedures not available in commercial auditory evoked potential systems have been developed. For the assessment of auditory discrimination a toolkit for evaluation of the mismatch negativity potential was developed and evaluated in six normal-hearing subjects.

Place, publisher, year, edition, pages
Linköping: Linköpings University Electronic Press, 2001. 22 p.
Series
Linköping Studies in Health Sciences. Thesis, ISSN 1100-6013 ; 47Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 871
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-28044 (URN)12805 (Local ID)91-7219-956-3 (ISBN)12805 (Archive number)12805 (OAI)
Presentation
(English)
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2013-11-13

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Hällgren, MathiasLarsby, BirgittaLyxell, BjörnArlinger, Stig

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Technical Audiology Faculty of Health SciencesDepartment of Behavioural Sciences and LearningFaculty of Arts and SciencesDepartment of ENT - Head and Neck Surgery UHLOto-Rhiono-Laryngology and Head & Neck Surgery
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