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Intra-individual variability and continuity of action and perception measures in infants.

Gampe A, Keitel A, Daum MM - Front Psychol (2015)

Bottom Line: Our findings suggest that individual development does not increase linearly for action or for perception, but instead changes dynamically.These non-continuous changes substantially affect the relation between action and perception at each measuring point and the respective direction of causality.This suggests that research on the development of action and perception and their interrelations needs to take into account individual variability and continuity more progressively.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, University of Zürich , Zürich, Switzerland.

ABSTRACT
The development of action and perception, and their relation in infancy is a central research area in socio-cognitive sciences. In this Perspective Article, we focus on the developmental variability and continuity of action and perception. At group level, these skills have been shown to consistently improve with age. We would like to raise awareness for the issue that, at individual level, development might be subject to more variable changes. We present data from a longitudinal study on the perception and production of contralateral reaching skills of infants aged 7, 8, 9, and 12 months. Our findings suggest that individual development does not increase linearly for action or for perception, but instead changes dynamically. These non-continuous changes substantially affect the relation between action and perception at each measuring point and the respective direction of causality. This suggests that research on the development of action and perception and their interrelations needs to take into account individual variability and continuity more progressively.

No MeSH data available.


Results. (A) Mean performance for action and perception (in %) of nine individual children and of the group with standard error of the mean at the different measuring points (7, 8, 9, and 12 months of age). Individual data displayed is of the children who provided action and perception measures at all measuring points. Although the number of participants was initially 25, only 18 children participated at age 12 months. Of those 18 who participated at all measuring points, only 9 consistently provided performance measures in both tasks. Note that the y-axis for each individual plot is scaled from 0 to 100%. (B) Bootstrap-corrected correlation coefficients (with SEM) for perception, action, perception-action and action-perception between measuring points (MPs) 7–8, 7–9, 7–12, 8–9, 8–12, and 9–12 months.
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Figure 2: Results. (A) Mean performance for action and perception (in %) of nine individual children and of the group with standard error of the mean at the different measuring points (7, 8, 9, and 12 months of age). Individual data displayed is of the children who provided action and perception measures at all measuring points. Although the number of participants was initially 25, only 18 children participated at age 12 months. Of those 18 who participated at all measuring points, only 9 consistently provided performance measures in both tasks. Note that the y-axis for each individual plot is scaled from 0 to 100%. (B) Bootstrap-corrected correlation coefficients (with SEM) for perception, action, perception-action and action-perception between measuring points (MPs) 7–8, 7–9, 7–12, 8–9, 8–12, and 9–12 months.

Mentions: At group level, we found similar action and perception abilities to those in the original study (see Figure 2A for individual and group means). The anticipation frequency increased from M7 months = 16.8 ± 22.4% (± SD) to M12 months = 64.2 ± 28.6% (Melzer et al., 2012: M6 months = 19.1 ± 3.2%, M12 months = 61.8 ± 3.8%). The frequency of contralateral reaching increased from M7 months = 18.2 ± 14.8% to M12 months = 34.3 ± 18.1% (Melzer et al., 2012: M6 months = 18.9 ± 15.9% to M12 months = 30.7 ± 15.4%).


Intra-individual variability and continuity of action and perception measures in infants.

Gampe A, Keitel A, Daum MM - Front Psychol (2015)

Results. (A) Mean performance for action and perception (in %) of nine individual children and of the group with standard error of the mean at the different measuring points (7, 8, 9, and 12 months of age). Individual data displayed is of the children who provided action and perception measures at all measuring points. Although the number of participants was initially 25, only 18 children participated at age 12 months. Of those 18 who participated at all measuring points, only 9 consistently provided performance measures in both tasks. Note that the y-axis for each individual plot is scaled from 0 to 100%. (B) Bootstrap-corrected correlation coefficients (with SEM) for perception, action, perception-action and action-perception between measuring points (MPs) 7–8, 7–9, 7–12, 8–9, 8–12, and 9–12 months.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4373265&req=5

Figure 2: Results. (A) Mean performance for action and perception (in %) of nine individual children and of the group with standard error of the mean at the different measuring points (7, 8, 9, and 12 months of age). Individual data displayed is of the children who provided action and perception measures at all measuring points. Although the number of participants was initially 25, only 18 children participated at age 12 months. Of those 18 who participated at all measuring points, only 9 consistently provided performance measures in both tasks. Note that the y-axis for each individual plot is scaled from 0 to 100%. (B) Bootstrap-corrected correlation coefficients (with SEM) for perception, action, perception-action and action-perception between measuring points (MPs) 7–8, 7–9, 7–12, 8–9, 8–12, and 9–12 months.
Mentions: At group level, we found similar action and perception abilities to those in the original study (see Figure 2A for individual and group means). The anticipation frequency increased from M7 months = 16.8 ± 22.4% (± SD) to M12 months = 64.2 ± 28.6% (Melzer et al., 2012: M6 months = 19.1 ± 3.2%, M12 months = 61.8 ± 3.8%). The frequency of contralateral reaching increased from M7 months = 18.2 ± 14.8% to M12 months = 34.3 ± 18.1% (Melzer et al., 2012: M6 months = 18.9 ± 15.9% to M12 months = 30.7 ± 15.4%).

Bottom Line: Our findings suggest that individual development does not increase linearly for action or for perception, but instead changes dynamically.These non-continuous changes substantially affect the relation between action and perception at each measuring point and the respective direction of causality.This suggests that research on the development of action and perception and their interrelations needs to take into account individual variability and continuity more progressively.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, University of Zürich , Zürich, Switzerland.

ABSTRACT
The development of action and perception, and their relation in infancy is a central research area in socio-cognitive sciences. In this Perspective Article, we focus on the developmental variability and continuity of action and perception. At group level, these skills have been shown to consistently improve with age. We would like to raise awareness for the issue that, at individual level, development might be subject to more variable changes. We present data from a longitudinal study on the perception and production of contralateral reaching skills of infants aged 7, 8, 9, and 12 months. Our findings suggest that individual development does not increase linearly for action or for perception, but instead changes dynamically. These non-continuous changes substantially affect the relation between action and perception at each measuring point and the respective direction of causality. This suggests that research on the development of action and perception and their interrelations needs to take into account individual variability and continuity more progressively.

No MeSH data available.