A laboratory study of diagnostic indices of bilateral neuromuscular organization in stutterers and normal speakers.

Jasper, Herbert H.

doi:10.1037/h0093289

Cited by 47 publications

(23 citation statements)

References 46 publications

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“…A second approach to variable preference has been to assign scores to questionnaire responses, sometimes weighted according to the subject's opinion as to the strength of preferences, and to derive a laterality quotient ranging from extreme right to extreme left (Jasper, 1932;Crovitz & Zener, 1962;Oldfield, 1969). The distribution of preference on such scales is always approximately J -shaped, the majority of individuals expressing strong right preference, a few strong left preference, and almost none in the centre or indifferent range.…”

Section: Marian Annettmentioning

confidence: 99%

A Classification of Hand Preference by Association Analysis

Annett

1970

British J of Psychology

2,154

940

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An association analysis was made of the responses of young adults to a hand-preference questionnaire. Many patterns of preference were distinguished and there were no marked differences between adjacent classes. These findings are believed to demonstrate that hand preference is distributed continuously and not discretely. When it is necessary to classify handedness, the preference continuum can be divided at several levels of discrimination. A second study of hand preference and manual speed showed that it is possible to order the main preference groups for asymmetry of manual skill. Some of the problems of studies of laterality are examined as possible consequences of the treatment of a continuous distribution as if it were discrete.For many everyday purposes human hand preference can be classified as left or right on the basis of the writing hand. When preferences for several actions are taken into account this simple dichotomy is insufficient; a large variety of patterns of preference can be distinguished. There are, for example, dextral writers who throw or deal playing cards with the left hand and sinistral writers who throw or hammer or use scissors with the right hand. There is a spectrum of varying preference and no clear-cut division between left and right. In attempts to tackle questions about handedness scientifically, this spectrum of preference has been treated in several ways and it will be argued below that none of these ways is entirely satisfactory. Lateral asymmetry has interested many writers over a long period of time (Uhrbrock, 1965) and is of current relevance in many fields of psychological inquiry including perception, motor skill and language, as well as in education, neurology and genetics. Despite this long-standing and continuing interest, there are few facts unequivocally established aboub human handedness. One of the reasons for this is that the terms 'left ' and 'right ' are deceptively simple; they have been used in almost as many ways as there have been writers on the topic because consistent criteria of lefthandedness have not been adopted. The aim of the present investigation was to discover how varieties of preference would be classified by an objective technique, association analysis. The purpose was to describe the main types of hand preference so that they could be defined on empirical rather than a priori grounds. A second part of the report evaluates the classes suggested by the association analysis against an independent criterion, differences between the hands in manual skill.The first and most common approach to the spectrum of variable preference has been to argue that the variability is a product of cultural pressure on the natural sinistral t o use the right hand. On this ground, all those showing any tendencies toward left usage are regarded as left-handers who have been shifted toward righthandedness to varying extents. Rife (Isao), for example, classified as left those who performed any one of ten unimanual actions with the left hand. By treating all degrees of...

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Section: Marian Annettmentioning

confidence: 99%

A Classification of Hand Preference by Association Analysis

Annett

1970

British J of Psychology

2,154

940

View full text Add to dashboard Cite

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“…While evidence available at that time was suggestive (Jasper, 1932;Bryngelson, 1935Bryngelson, , 1940Lindsley, 1940;Douglass, 1943), further research was unable to vindicate this theory and interest in it subsequently dwindled. In the last decade, however, the results of new investigatory techniques have led to renewed interest in the Orton-Travis theory.…”

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confidence: 99%

Stuttering: an investigation into cerebral dominance for speech

Andrews

Quinn

Sorby

1972

Journal of Neurology, Neurosurgery & Psychiatry

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SUMMARY Over the past decade research has suggested that stutterers have bilateral cerebral motor or auditory speech areas. Three typical adult stutterers showed normal unilateral left cerebral dominance for speech on the intracarotid sodium amylobarbitone (amytal) test, but one 'dysphatic' stutterer had bilateral cortical speech representation. The latter is a very rare finding in right handed individuals and presumably is a consequence of the head injury induced aphasia that preceded the onset of stuttering.Some 40o of children stutter, and while most subsequently remit, stuttering persists in about

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“…ganization of some stutterers is different from that of normally fluent speakers and might not, in fact, be limited to just one specific level of brain functioning (Quinn, 1975;Zimmerman and Knott, 1974). Other levels of possible neurological dysfunction include visual perceptual laterality (Jasper, 1932), unilateral eyelid movement (Barrett and Stoeckel, 1979), oral and laryngeal reaction times (Adams and Hayden, 1976;Adler and Starkweather, 1979), attending problems (Riley and Riley, 1979), and auditory laterality (Curry and Gregory, 1969).…”

Section: Discussionmentioning

confidence: 99%

Auditory processing and perceptual abilities of “organic” and “functional” stutterers

Liebetrau

Daly

1981

Journal of Fluency Disorders

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The present investigation was undertaken to determine whether significant differences in auditory processing and perceptual abilities exist between (1) stutterers as a supposedly homogeneous group when compared with controls, (2) two differentiated subgroups of stutterers, and (3) either of the stuttering subgroups when separately compared with controls. Dichotic listening and masking level difference (MLD) tasks were administered to the two groups of school-age stutterers and an age-matched nonstuttering control group. Stuttering subjects were differentiated into "organic" and "functional" subgroups on the basis of neuropsychological test performances. Organic stutterers performed significantly poorer than did controls on one MLD experimental condition. Functional stutterers performed more like control subjects than like organic stutterers. Starkweather, Hirschman, and Tannenbaum, 1976), atypical performance on neuropsychological tests (Daly and Smith, 1976; Daly, Kimbarrow, and Smith, 1977), lack of cerebral dominance (Curry and Gregory, 1969; Brady and Berson, 1975), and dysfunction of auditory processing and perceptual abilities (Hall and Jerger, 1978; Toscher and Rupp, 1978). The hypothesis that some type of organic dysfunction may

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A laboratory study of diagnostic indices of bilateral neuromuscular organization in stutterers and normal speakers.

Cited by 47 publications

References 46 publications

A Classification of Hand Preference by Association Analysis

A Classification of Hand Preference by Association Analysis

Stuttering: an investigation into cerebral dominance for speech

Auditory processing and perceptual abilities of “organic” and “functional” stutterers

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