Why the study?
Do new scoring methods incorporating prestimulus variability improve correlations between physiological variables and self-reported mood compared to Autonomic Lability Scores?
Do new scoring methods incorporating prestimulus variability improve correlations between physiological variables and self-reported mood compared to Autonomic Lability Scores?
Adjusting for prestimulus variability using covariance and changing sampling methods improves the correlation between physiological reactivity and self-reported mood.
Covariance adjustment may strengthen physiological-mood research metrics; leaves open clinical translation pending validation.
In an attempt to improve the scoring of physiological responses, in terms of higher inter‐correlations of physiological variables and correlations with self‐report measures of mood change, three new scores were compared with Autonomic Lability Scores. The first score was produced by changing the sampling of physiological records to minimize spontaneous fluctuations. This increased the physiological‐mood correlations. The second and third scores provided, additionally, corrections for individual prestimulus variability. Such corrections, done by covariance adjustment, tended to increase the physiological‐mood correlations further. When done by a division procedure, no improvements were observed. None of the three scoring methods affected substantially the inter‐correlations of physiological variables. Heart rate, skin conductance, and forehead muscle tension were measured during two stimuli: a noxious movie and a mild noise.
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Edward J. Malmstrom (1968) studied this question.
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