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Tonic and phasic co-variation of peripheral arousal indices in infants.

Wass SV, de Barbaro K, Clackson K - Biol Psychol (2015)

Bottom Line: Tonic pupil size showed significant positive covariation, but phasic pupil changes were inconsistent.We conclude that: (i) there is high covariation between autonomic indices in infants, but that EDA may only be sensitive at extreme arousal levels, (ii) that tonic pupil size covaries with other indices, but does not show predicted patterns of phasic change and (iii) that motor activity appears to be a good proxy measure of ANS activity.The strongest patterns of covariation were observed using epoch durations of 40s per epoch, although significant covariation between indices was also observed using shorter epochs (1 and 5s).

View Article: PubMed Central - PubMed

Affiliation: Medical Research Council Cognition and Brain Sciences Unit, Cambridge, UK. Electronic address: samwass@gmail.com.

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Correlation matrix showing the relationship between the baseline arousal indices. Histograms showing the distribution of each variable are shown diagonally on the 1:1 line. Below this line, scatterplots show the relationships between variables. Linear regression lines have been drawn in black. Above the 1:1 line, the Pearson’s product moment correlation shows the relationship between the two variables. The stars show the significance levels of the bivariate correlation: **p(2-tailed) < .01, *p < .05, and (*)p < .10. The autonomic measures used to compare with the pupil size recording have been obtained from a different section of the testing battery, as described in Section 3.
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fig0015: Correlation matrix showing the relationship between the baseline arousal indices. Histograms showing the distribution of each variable are shown diagonally on the 1:1 line. Below this line, scatterplots show the relationships between variables. Linear regression lines have been drawn in black. Above the 1:1 line, the Pearson’s product moment correlation shows the relationship between the two variables. The stars show the significance levels of the bivariate correlation: **p(2-tailed) < .01, *p < .05, and (*)p < .10. The autonomic measures used to compare with the pupil size recording have been obtained from a different section of the testing battery, as described in Section 3.

Mentions: Fig. 3 shows the bivariate relationships between the baseline arousal measures. 2-Tailed significance values are reported. Significant relationships were observed between the following pairs of variables: HV vs HR: r(27) = .48, p < .01; HV vs PA: r(29) = .54 p < .005; HR vs PA: r(27) = .44 p < .05; HR vs PS: r(26) = .49, p = .01. All other relationships were non-significant. In addition, an identical parallel comparison was conducted to examine how pupil size co-varied with other measures during the two baseline videos, when it was not possible to control for on-screen luminance. Pearson’s product-moment correlations suggested consistent but weaker and non-significant correlations between pupil size and: HV r = .28, HR r = .16, PA r = .19 and EDA r = .14.


Tonic and phasic co-variation of peripheral arousal indices in infants.

Wass SV, de Barbaro K, Clackson K - Biol Psychol (2015)

Correlation matrix showing the relationship between the baseline arousal indices. Histograms showing the distribution of each variable are shown diagonally on the 1:1 line. Below this line, scatterplots show the relationships between variables. Linear regression lines have been drawn in black. Above the 1:1 line, the Pearson’s product moment correlation shows the relationship between the two variables. The stars show the significance levels of the bivariate correlation: **p(2-tailed) < .01, *p < .05, and (*)p < .10. The autonomic measures used to compare with the pupil size recording have been obtained from a different section of the testing battery, as described in Section 3.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4645095&req=5

fig0015: Correlation matrix showing the relationship between the baseline arousal indices. Histograms showing the distribution of each variable are shown diagonally on the 1:1 line. Below this line, scatterplots show the relationships between variables. Linear regression lines have been drawn in black. Above the 1:1 line, the Pearson’s product moment correlation shows the relationship between the two variables. The stars show the significance levels of the bivariate correlation: **p(2-tailed) < .01, *p < .05, and (*)p < .10. The autonomic measures used to compare with the pupil size recording have been obtained from a different section of the testing battery, as described in Section 3.
Mentions: Fig. 3 shows the bivariate relationships between the baseline arousal measures. 2-Tailed significance values are reported. Significant relationships were observed between the following pairs of variables: HV vs HR: r(27) = .48, p < .01; HV vs PA: r(29) = .54 p < .005; HR vs PA: r(27) = .44 p < .05; HR vs PS: r(26) = .49, p = .01. All other relationships were non-significant. In addition, an identical parallel comparison was conducted to examine how pupil size co-varied with other measures during the two baseline videos, when it was not possible to control for on-screen luminance. Pearson’s product-moment correlations suggested consistent but weaker and non-significant correlations between pupil size and: HV r = .28, HR r = .16, PA r = .19 and EDA r = .14.

Bottom Line: Tonic pupil size showed significant positive covariation, but phasic pupil changes were inconsistent.We conclude that: (i) there is high covariation between autonomic indices in infants, but that EDA may only be sensitive at extreme arousal levels, (ii) that tonic pupil size covaries with other indices, but does not show predicted patterns of phasic change and (iii) that motor activity appears to be a good proxy measure of ANS activity.The strongest patterns of covariation were observed using epoch durations of 40s per epoch, although significant covariation between indices was also observed using shorter epochs (1 and 5s).

View Article: PubMed Central - PubMed

Affiliation: Medical Research Council Cognition and Brain Sciences Unit, Cambridge, UK. Electronic address: samwass@gmail.com.

Show MeSH
Related in: MedlinePlus