PubMed Health⌕ Search

Biomedical subjects

J M Giesen

Publications and source records attributed to J M Giesen.

7 recordsLinked to original sources

Some empirical evidence for ecological dissonance theory.

Using Festinger's cognitive dissonance theory as a model, the extension to Barker's ecological theory, referred to as ecological dissonance theory, was developed. Designed to examine the motivational dynamics involved when environmental systems are in conflict with each other or with cognitive systems, ecological dissonance theory yielded five propositions which were tested in 10 studies. This summary of the studies suggests operationally defined measures of ecological dissonance may correlate with workers' satisfaction with their jobs, involvement with their jobs, alienation from their work, and to a lesser extent, workers' conflict resolution behavior and communication style.

Adaptation, Psychological↗

An evaluation of chiropractic manipulation as a treatment of hyperactivity in children.

The principle aim of this study was to determine the effectiveness of chiropractic manipulative therapy in the treatment of children with hyperactivity. Using blinds between investigators and a single subject research design, the investigators evaluated the effectiveness of the treatment for reducing activity levels of hyperactive children. Data collection included independent evaluations of behavior using a unique wrist-watch type device to mechanically measure activity while the children completed tasks simulating school-work. Further evaluations included electrodermal tests to measure autonomic nervous system activity. Chiropractic clinical evaluations to measure improvement in spinal biomechanics were also completed. Placebo care was given prior to chiropractic intervention. Data were analyzed visually and using nonparametric statistical methods. Five of seven children showed improvement in mean behavioral scores from placebo care to treatment. Four of seven showed improvement in arousal levels, and the improvement in the group as a whole was highly significant (p = 0.009). Agreement between tests was also high in this study. For all seven children, three of the four principal tests used to detect improvement were in agreement either positively or negatively (parent ratings of activity, motion recorder scores, electrodermal measures, and X-rays of spinal distortions). While the behavioral improvement taken alone can only be considered suggestive, the strong interest agreement can be taken as more impressive evidence that the majority of the children in this study did, in fact, improve under specific chiropractic care. The results of this study, then, are not conclusive, however, they do suggest that chiropractic manipulation has the potential to become an important nondrug intervention for children with hyperactivity. Further investigation in this area is certainly warranted.

Attention Deficit Disorder with Hyperactivity↗

Skin conductance and heart-rate responsivity to public speaking imagery among students with high and low self-reported fear: a comparative analysis of "response" definitions.

The experiment evaluated the feasibility of using self-report measures of public speaking anxiety to select autonomically responsive Ss for behavior therapy research and the influence of E's definition of "response" on empirical generalizations derived from the study. Heartrate and skin conductance responses of Ss who scored high and of Ss who scored low on self-report fear measures were monitored during neutral and speech-related imagery. High-scoring Ss were more responsive than were low-scoring Ss, but the surplus responsivity was not cued uniquely by speech-related imagery. Examination of four definitions (transformations) of heart-rate response and five definitions of skin conductance response showed that different conclusions were yielded by differing response definitions. Implications of the findings for further research are presented.

Fear↗

Correlates of myoelectric asymmetry detected in low back pain patients using hand-held post-style surface electromyography.

OBJECTIVE: Paraspinal surface electromyographic (SEMG) scanning, utilizing post-style hand-held electrodes, was conducted to determine the usefulness of the technique as an assessment for myoelectric indicators of low back pain (LBP). A secondary objective was to correlate myoelectric abnormalities with other known outcome measures of the manipulable lesion. DESIGN: Blinded SEMG assessments with the patients standing upright, fully flexed and extended at the trunk, and measures of pressure pain thresholds (PPT) were made after four tests administered by another examiner. SETTING: The research was conducted on patients in a private chiropractic practice. PATIENTS: A convenience sample of 10 of the practitioner's most acute LBP patients without neurological deficit were asked to participate and none refused. Six patients without recent LBP volunteered as controls. MAIN OUTCOME MEASURES: Preset myoelectric indicators included: thoracolumbar asymmetry (T-L/A: first seen in an earlier pilot study), loss of flexion/relaxation (F/R) at L3, contralateral responsivity (increased myoelectric activity opposite the side of leg pain) and right/left asymmetry (R-L/A) at L3. RESULTS: Significant differences between groups were seen in T-L/A (p = .04) and R-L/A [data averaged from three postures (p = .04)], and robust group differences were seen in F/R (p = .011 right; p = .026 left). Contralateral responsivity was not significant. Loss of F/R was the only indicator that correlated with diminished PPT (r = .52 right; r = .46 left) and with Oswestry disability (r = .42), and that negatively correlated, as expected, with straight leg raising (r = -.50 right; r = -.74 left). CONCLUSIONS: Results support use of the technique to detect muscle dysfunction related to LBP. Further research of SEMG correlations with measures of the manipulable lesion is warranted.

Chiropractic↗