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  • 1980-1984  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 18 (1981), S. 0 
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Thirty-two subjects participated in 6 biofeedback training sessions to produce increases and decreases in skin conductance (SC) or heart rate (HR). Performance on control trials was examined with respect to SC and HR, as well as respiratory and somatomotor variables. The subjects also participated in 3 test sessions (on days 2, 5, and 9), which evaluated their ability to discriminate the target autonomic response, and sought to identify the bases for SC and HR discriminations. This design permitted examination of three major predictions from Brener's theory about the process which underlies the acquisition of autonomic control through biofeedback. The first prediction, that positive correlations should be obtained between control and discrimination performance throughout training, was not supported by the data. The other predictions, that control and discrimination performance both should become more specific to the target response as a function of training, were likewise not supported. On the whole, neither for SC nor for HR control was the pattern of results favorable to Brener's views.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 18 (1981), S. 0 
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Brener has proposed a general theory of the development of voluntary control which offers as its focus an account of the process underlying the acquisition of control over autonomic responses. This account views the acquisition process as consequent to the development of the subject's ability to discriminate afferentation related to the response state to be produced and to his formulating an appropriate response image on the basis of this afferentation. The paper begins with an extensive review of biofeedback studies pertinent to the theory. This review yields little convincing evidence for Brener's views. Selected studies on the performance and the acquisition of motor skills and on the nature of the image are then examined. These suggest that the development of control of a response may rely primarily on efferent processes, with afferent processes playing, at most, a secondary role. A two-process theory of the acquisition of autonomic control is then presented. The theory proposes that, in most instances, biofeedback training leads to autonomic control through a process consisting primarily in the identification of efferent behavioural programmes already within the subject's repertoire. The theory further proposes that an afferent acquisition process such as postulated by Brener may also underlie the development of autonomic control, but only under conditions where behavioural programmes effective in controlling the target response are either unavailable or inaccessible to the subject.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Larvae of Pleurodeles poireti were maintained during their development at a high temperature (31° C). In several species of amphibians, such a treatment is known to change the sex ratio through the inversion of genotypic females into phenotypic males. Pleurodeles poireti is an exception. It is the first reported amphibian in which heat induces an inversion of genotypic males into functional phenotypic females. The sexual genotype of standard and experimental phenotypic females was determined through heterochromosomes in lampbrush stage. In the present study, we have utilised another technique for identification of sexual genotype, applicable to both phenotypic males and females. It is based on the differential expression of a sexlinked gene, the peptidase 1.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Applied psychophysiology and biofeedback 9 (1984), S. 407-410 
    ISSN: 1573-3270
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Applied psychophysiology and biofeedback 8 (1983), S. 281-292 
    ISSN: 1573-3270
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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