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  • 1
    Electronic Resource
    Electronic Resource
    Correcting Baseline Drift Artifact in Slow Potential Recording (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 19 (1982), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: A problem frequently encountered by investigators measuring scalp-recorded DC potentials is baseline drift artifact. The sources of baseline drift are many and it is often very difficult to remove drift from the primary data. The problem is particularly acute when long recording epochs are under investigation. The present paper proposes a software solution. A FORTRAN IV computer program defines drift as a significant linear trend in prestimulus voltage on successive experimental trials. When drift is determined to be present, its slope is computed and statistically removed from the data in the poststimulus (response) period. A sample data set is included which demonstrates the method's marked improvement of signal-to-noise ratios, as represented by reduced error variance and improved statistical discrimination between the independent variables of an experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1469-8986.1982.tb02526.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    How we think about cognition, emotion, and biology in psychopathology (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 33 (1996), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: The variety of potential relationships assumed between psychological and biological concepts fosters considerable misunderstanding of what our data can tell us. A naively reductionistic view of psychological concepts is prevalent, particularly in the psychopathology literature. A series of examples of the application of psychophysiological methods in studies of cognition, emotion; and psychopathology provides a background for a discussion of these problems. Unwarranted distinctions between cognition and emotion, between classes of measures, and between psychological and biological approaches to understanding normal functioning and psychopathology undermine the ability of cognitive neuroscience to achieve its considerable potential. A nondualistic, nonreductionistic, noninteractive relationship is recommended, with psychological and biological concepts both having central, necessary, and distinct roles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1469-8986.1996.tb02356.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Digital Filtering: Background and Tutorial for Psychophysiologists (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 29 (1992), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Digital filtering offers more to psychophysiologists than is commonly appreciated. An introduction is offered here to foster the explicit design and use of digital filters. Because of considerable confusion in the literature about terminology important to both analog and digital filtering, basic concepts are reviewed and clarified. Because some time series concepts are fundamental to digital filtering, these are also presented. Examples of filters commonly used in psychophysiology are given, and procedures are presented for the design and use of one type of digital filter. Properties of some types of digital filters are described, and the relative advantages of simple analog and digital filters are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1469-8986.1992.tb01709.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Editorial (2000)
    Oxford, UK : Blackwell Publishing
    Psychophysiology 37 (2000), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: In 1960, the newly founded Society for Psychophysiological Research captured the already considerable breadth of the just-forming field of psychophysiology. The Society began publishing Psychophysiology in 1964 with the mandate to address that breadth. As the field has grown rather enormously in the past 40 years, the journal has expanded accordingly. Whole new (and still overlapping) fields such as behavioral medicine have taken root, and new technologies such as hemodynamic brain imaging continue to enrich the psychophysiologist's toolbox. Beyond important domains of clinical, developmental, and human-factors application and exciting methodological developments, psychophysiology has made great progress on basic substantive questions such as the relationship of fundamental reflexes to emotional behavior and the role of regional brain specialization in perceptual and cognitive function. In so doing, the field has necessarily faced up to conceptual challenges such as what is involved in manipulating emotion in the laboratory and in verifying the manipulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1469-8986.3710001
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Contrasting patterns of brain activity in anxious apprehension and anxious arousal (1999)
    Oxford, UK : Blackwell Publishing
    Psychophysiology 36 (1999), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Evidence suggests that a distinction between anxious apprehension (worry) and anxious arousal (somatic anxiety) might account for some discrepancies in the literature examining brain activity in anxiety. In the current study, we compared the regional brain activity of groups of anxious apprehension and anxious arousal participants, selected on the basis of self-report measures previously shown to be psychometrically distinct from each other and from a specific measure of depression. Patterns of hemispheric asymmetry in electroencephalogram alpha distinguished the two types of anxiety, with the anxious arousal group showing more right than left activity. No significant asymmetry was found for the anxious apprehension group. The results provide further support for contrasting patterns of brain activity in distinct types of anxiety. Research is needed to specify further the topography and functional significance of this distinction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1469-8986.3650628
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Converging evidence for a cognitive anomaly in early psychopathology (1999)
    Oxford, UK : Blackwell Publishing
    Psychophysiology 36 (1999), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Subcomponents of the N200 component of the event-related brain potential believed to be differentially sensitive to involuntary and voluntary cognitive processes were examined. Nonpatients (N= 131) identified initially by the Chapman and Depue research scales and classified later on the basis of diagnostic symptom clusters and family psychiatric history provided converging evidence for an intact mismatch negativity subcomponent. In contrast, the N2b subcomponent distinguished several groups of subjects. Results suggested abnormal voluntary cognitive processing, perhaps reflecting compensatory efforts in subjects at risk for or manifesting psychopathology, particularly those showing negative symptoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0048577299951727
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Memory template comparison processes in anhedonia and dysthymia (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 30 (1993), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Anhedonic subjects, potentially at risk for psychopathology because of a deficient ability to experience pleasure, have demonstrated a large N200 component in the event-related brain potential (ERP). The present experiment attempted to determine the psychological significance of this finding in light of Näätänen's (1990) distinction between N2a and N2b subcomponents. Anhedonics were contrasted with controls and dysthymics, an at-risk group reporting depression. Across groups, N2a was larger when a tone mismatched a longer run of preceding identical tones. Thus, an involuntary mismatch process appears to be intact in both at-risk groups. However, the three groups produced distinct N2bs as a function of stimulus sequence. The N2b finding for anhedonics is consistent with Knight's (1984, 1992) model of early stimulus processing deficits in schizophrenia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1469-8986.1993.tb02090.x
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    DMA-Mode Timing Question for A/D Converters (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 27 (1990), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1469-8986.1990.tb00397.x
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Cross-modal generality of the gating deficit (2005)
    Oxford, UK : Blackwell Publishing
    Psychophysiology 42 (2005), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Auditory P50/M50 paired-click studies have established an association between schizophrenia and impaired sensory gating in the auditory modality. However, the presumed cross-modal generality of the gating deficit has received little study. The present study examined gating in area 3b of primary somatosensory cortex to evaluate patients' somatosensory gating at this first stage of cortical processing. One hundred twenty-two channels of magnetoencephalography (MEG) data were collected from 27 subjects with chronic schizophrenia and 21 controls during a somatosensory paired-pulse paradigm with a 75- or 500-ms interstimulus interval. M20 somatosensory responses were localized using magnetic source imaging, and a gating ratio was calculated. In a subset of these subjects, MEG was also done for the standard auditory paradigm to assess M50 gating. Patients showed abnormal auditory M50 gating but normal somatosensory M20 gating. Results argue against a cross-modal gating deficit in primary somatosensory cortex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1469-8986.2005.00292.x
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  • 10
    Electronic Resource
    Electronic Resource
    Generalized Implementation of an Eye Movement Correction Procedure (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 25 (1988), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1469-8986.1988.tb00999.x
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    Paper (German National Licenses)
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