Behavioral measures
Demographic characteristics for the study’s sample are described in Table 1.
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Table 1. Demographic characteristics
|
|
N
|
%
|
Gender
|
Female
|
17
|
100
|
Annual household income ($)
|
Under 5,000
|
7
|
41
|
5,000-10,000
|
4
|
23
|
10,000-30,000
|
3
|
18
|
30,000-50,000
|
3
|
18
|
Maternal Education level
|
High school graduate or less
|
8
|
47
|
Some college
|
8
|
47
|
College graduate
|
1
|
6
|
Characterizing the study population by parent-child interaction online and offline Parent-child interaction (online) median calculation: Of the 17 children who participated in the both the MRI session and in the shared reading task with their mothers, eight had engagement scores less than the median (1.67) and one child got a score that was equivalent to the median (a total of nine children who had under/equal the median score), whereas eight had greater scores for their engagement in the shared reading task. Interaction challenges were also assessed, whereases nine mothers checked their phones and eight mothers did not. See Table 2.
Parent-child interaction (offline) median calculation: Of the 17 mothers, seven demonstrated BDI scores less than the median (median: 8.67) and two had BDI scores which are equivalent to the median (a total of nine mothers had under/equal the median scores) whereas eight mothers had BDI scores greater than the median. See Table 2.
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Table 2. Behavioral measurements of the mothers and the parent-child interaction during the shared reading task
|
Mean (SD)
|
Median
|
Min-max
|
Number of mothers below or equal the median
|
Number of mothers above median
|
Child engagement level (online measure)
|
1.57 (0.97)
|
1.67
|
0-3
|
9
|
8
|
Engagement challenges (online measure)
|
0.47 (0.51)
|
0
|
0-1
|
9
|
8
|
Maternal depression; BDI (offline measure)
|
12.73 (7.98)
|
8.67
|
2.67-29.27
|
9
|
8
|
Table 2. The engagement challenges were assessed using the CONNECT measure (see [18]) focusing on the number of times the parent checked their phones during the storytelling activity.
Pearson correlation between parent-child interaction during storytelling measures and offline parent-child interaction measures
A positive trend was found between maternal depression levels and the online measure for parent-child interaction challenges (i.e the number of phone checks by the mother) (r=.389, p=.06). Additionally, a negative trend between maternal depression and storytelling interaction (r=-.363, p=.07).
A Pearson correlation within the parent-child online interaction measures during storytelling revealed a negative correlation between the number of phone checks and the level of child engagement (r=-0.778, p<0.001) indicating more phone checks were related to lower interaction during storytelling. Results suggest that higher maternal depression levels are related to more phone checks and lower interaction with the child during storytelling and that more phone checks are related to lower child engagement.
Neuroimaging results
Whole brain analysis
The whole brain matrices included in the DM algorithm, demonstrated a successful classification of the participants by the “Child Engagement” and “Phone Check” online behavioral measurements as the input. The DM algorithm also successfully clustered the participants by their maternal depression level (BDI measurement). See Figure 1.
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Figure 1. Whole brain analysis during story listening. The black color represents datasets with values lower than the median; red color: values greater than the median. The green color represents the centroid for datasets with values lower than the median and the blue color represents centroids for datasets with values greater than the median. The upper maps represent the data for the division by parent-child interaction during storytelling (left; child engagement, right; number of times the mother checked the phone). The lower map represents the data for the division by offline mother-child interaction (i.e. maternal depression).
DM containing the combination of the Visual, FP, and CO networks
Importing into the DM the specific functional networks for the ROIs in the selected visual processing and EF networks (FP, CO) during the stories-listening task, and coloring them based on the median values above and below the three selected measurements, the DM algorithm was able to split the full cohort into the two groups of high vs low interaction (i.e. successfully classified) the participants by the “Child Engagement” and “Phone Check” online behavioral measurements. See Figure 2.
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Figure 2. Visual processing and EF networks-based DMs. The black color represents datasets with values lower than the median; red color: values greater than the median; green color; centroid for datasets with values lower than the median and the blue color represents centroids for datasets with values greater than the median. The upper maps represent the data for the division by parent-child interaction during storytelling (left; child engagement, right; number of times the mother checked the phone). The lower map represents the data for the division by offline mother-child interaction (i.e. maternal depression).
DM containing the combination of the Auditory, FP, and CO networks
Importing into the DM the functional connectivity networks from the auditory processing and EF networks (FP, CO) during the stories-listening task, and coloring them based on the median values above and below the three selected measurements, the DM algorithm successfully classified the participants only by the “Child Engagement” behavioral measurement and was not sensitive for the differences between the groups while focusing on the number of phone checks. See Figure 3.
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Figure 3. Auditory processing and EF networks-based DMs. The black color represents datasets with values lower than the median; red color: values greater than the median; green color; centroid for datasets with values lower than the median and the blue color represents centroids for datasets with values greater than the median. The upper maps represent the data for the division by parent-child interaction during storytelling (left; child engagement, right; number of times the mother checked the phone). The lower map represents the data for the division by offline mother-child interaction (i.e. maternal depression).
DM containing the combination of the Auditory, Visual, FP, and CO networks
Importing into the DM the functional connectivity networks from the auditory and visual processing and EF networks (FP, CO) during the stories-listening task, and coloring them based on the median values above and below the three selected measurements did not show successful clustering. See Figure 4.
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Figure 4. Visual and auditory processing and EF networks-based DMs. The black color represents datasets with values lower than the median; red color: values greater than the median; green color; centroid for datasets with values lower than the median and the blue color represents centroids for datasets with values greater than the median. The upper maps represent the data for the division by parent-child interaction during storytelling (left; child engagement, right; number of times the mother checked the phone). The lower map represents the data for the division by offline mother-child interaction (i.e. maternal depression).
Correlations between the distance from the centroids of each group, per DM condition and behavioral measures
Table 3 demonstrates the distances between centroids of each group (low vs high parent-child interaction), for each networks’ combination and parent-child interaction condition. The largest distance between centroids were found for the combination of the visual, CO, and FP networks, by the parent-child interaction measures during storytelling (i.e. “Child Engagement” and “Phone Check” measurements), which were 0.3067 and 0.3187, respectively. These results indicate that the DM algorithm best classified the neural matrices by these behavioral measurements, into two different clusters. The distances between the centroids, separating the neural data by the offline parent-child interaction (BDI measurement), were nearly close, for all the between-networks analyses, which indicates that the DM algorithm could not cluster more successfully between the different between-networks analyses.
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Table 3. Distances between the centroid
|
Whole brain
|
Visual-EF
|
Auditory-EF
|
Visual-Auditory-EF
|
|
Offline
|
Online
|
|
Offline
|
Online
|
|
Offline
|
Online
|
|
Offline
|
Online
|
|
|
BDI
|
Child Engagement
|
Phone Check
|
BDI
|
Child Engagement
|
Phone Check
|
BDI
|
Child Engagement
|
Phone Check
|
BDI
|
Child Engagement
|
Phone Check
|
Distance between centroids
|
0.206
|
0.185
|
0.264
|
0.196
|
0.306
|
0.318
|
0.168
|
0.188
|
0.279
|
0.192
|
0.158
|
0.214
|
Table 3. The distances between centroids for each parent-child interaction measure (o line and offline) for each networks combinations is presented in the table.