Measuring Executive Behavior in Psychiatric Patients and Controls With Recurrence Quantification Analysis
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2018-07-06
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en
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Abstract
Executive functioning is impaired in mental disorders and defined as being dynamical. However,
it is often analyzed with linear measures. In recent years nonlinearity is used more often when
studying dynamical systems but has been sparsely used for researching executive functioning in
mentally ill patients. The purpose of the current study was to examine the range of utility of
nonlinear measures with recurrence quantification analysis in quantifying executive functioning
within the random number generation task in patients and controls. To this aim, a multivariate
analysis and two multinomial regressions were performed. Results showed group differences in
randomness on three linear measures being coupon, adjacency and phi 2-gram scores, and four
nonlinear measures being determinism, entropy, laminarity and recurrence rate between groups.
Furthermore, the presented random number generation task was able to differentiate between
patients and healthy participants, based on a linear measure being Adjacency, and a nonlinear
measure, being recurrence rate. Future research should further examine the sensitivity and
specificity of the different linear and nonlinear measures, collect normative data, and compare
the random number generation paradigm with other neuropsychological tasks.
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Faculteit der Sociale Wetenschappen