Developmental Psychology

Silletti, Fabiola; Salvadori, Eliala A.; Presaghi, Fabio; Fasolo, Mirco; Aureli, Tiziana; Coppola, Gabrielle

doi: 10.1037/dev0001389pmid: 35737537

Mind-mindedness (MM) refers to caregivers’ proclivity to treat a child as having an active and autonomous mental life. It has been shown to be a powerful predictor of many developmental outcomes and to mitigate the impact of risk conditions. However, longitudinal studies on MM reporting changes over time and individual differences among mothers have been scant and quite inconclusive, mainly due to the investigation of changes between only two time points. The current study analyzes MM’s developmental trajectories across four time points (3, 6, 9, and 12 months of infants’ age) along with the moderating effects of four variables (maternal sensitivity, age, education, and family income). The sample included healthy mother–infant dyads (N = 93, 46 female infants), belonging to monolingual Italian predominantly middle-class families, with 15% (n = 14) classified as low income (below the relative poverty threshold). The dyads were videotaped during semistructured play interactions and transcripts were coded for appropriate mind-related comments (AMRCs) and nonattuned mind-related comments (NAMRCs). Mothers’ AMRCs, compared to NAMRCs, showed more temporal stability. Both AMRCs and NAMRCs showed a linear decrease with individual differences across dyads decreasing over time, and dyads becoming increasingly similar one with the other. Low income moderated the normative trend of appropriate mind-related comments. These findings suggest that MM, while depending largely on an individual trait at earlier ages, when infants’ mental states are less intelligible, adapts to the increase of infants’ sociocommunicative repertoire over time. They also highlight the importance of ecological constraints on the quality of caregiving.

Cooijmans, Kelly H. M.; Beijers, Roseriet; de Weerth, Carolina

doi: 10.1037/dev0001392pmid: 35653761

This randomized controlled trial (NTR5697) examined the effects of a 5-week daily skin-to-skin contact (SSC) intervention, compared with care-as-usual, on full-term infant crying and sleeping duration during the first 12 weeks postnatally (secondary outcomes of this trial). This trial included 116 Dutch healthy mothers and their full-term infants. SSC mothers were instructed to provide 1 hr daily of SSC for the first 5 weeks postpartum. Intention-to-treat analyses revealed no group differences in infant crying (i.e., total duration and mean bout length) and sleeping (i.e., total duration and mean bout length). Per-protocol analyses, including only the SSC dyads who adhered to SSC guidelines, indicated that SSC reduced infant total crying duration and the crying bout length. Similarly, dose-response analyses indicated that more SSC minutes were associated with less infant crying (i.e., shorter total duration and bout length) and longer total sleeping duration, especially when the infant was younger. No group differences and associations were found with sleeping bout length. Mother-infant SSC, when performed regularly, may be a cost-effective intervention to reduce infant crying and potentially also extend infant sleep duration.

Krapf-Bar, Dafna; Davidovitch, Michael; Rozenblatt-Perkal, Yael; Gueron-Sela, Noa

doi: 10.1037/dev0001388pmid: 35666927

Parental mobile device use while parenting has been associated with reduced parental responsiveness and increased negative affect among children. However, it remains unclear whether it can interfere with the process of acquiring social communication skills. Thus, this study sought to experimentally examine whether maternal mobile phone use while interacting with the child has an immediate effect on the frequency of mothers’ and infants’ joint attention (JA) behaviors, the likelihood that these behaviors will lead to JA episodes, and the duration of established JA episodes. Participants were a community sample of 114 (Mage = 11.36 months; 50% male) Israeli typically developing infants, in which most mothers were highly educated and living in two-parent families. Mother–infant dyads completed a modified still-face paradigm and were randomly assigned to one of three experimental conditions during the still-face phase: (a) mobile phone disruptions, (b) social disruptions, and (c) undisrupted play. Mother–infant interactions were coded for frequency of JA behaviors and duration of JA episodes. In dyads assigned to the mobile phone disruptions condition, infants produced more JA initiations, mothers were less likely to contingently respond to infant initiations, JA behaviors were less likely to result in established JA, and JA episodes were shorter compared to dyads in the two control conditions and the baseline free play phase. Findings suggest that maternal mobile phone use during face-to-face interactions with the infant can disrupt the process of establishing JA in ongoing mother–child interactions. Possible implications from this line of work for family digital media use are discussed.

Guedes, Carolina; Cadima, Joana

doi: 10.1037/dev0001062pmid: 35666931

The interplay between self-regulation related skills and language is well recognized in dynamic theories, but few empirical studies have tested it, especially in toddlers. The current study examines the bidirectional links between self-regulation related skills and expressive vocabulary in a longitudinal study during toddlerhood. Participants were 268 toddlers (Mage = 29.6 months, SD = 4.2; 52% boys), mostly of Portuguese nationality, with medium to high sociocultural and economic status, attending private for-profit and nonprofit facilities in Portugal. Self-regulation (executive function and effortful control) and expressive vocabulary were assessed across three assessment waves. Results from cross-lagged panel models suggested bidirectional links between self-regulation and expressive vocabulary across the three assessment waves. These findings add to previous research by taking a first step into establishing the early onset of the intertwined development of these two foundational skills.

Price, Gwendolyn F.; Ogren, Marissa; Sandhofer, Catherine M.

doi: 10.1037/dev0001391pmid: 35653758

The ability to categorize emotions has long-term implications for children’s social and emotional development. Therefore, identifying factors that influence early emotion categorization is of great importance. Yet, whether and how language impacts emotion category development is still widely debated. The present study aimed to assess how labels influence young children’s ability to group faces into emotion categories for both earliest-learned and later-learned emotion categories. Across two studies, 128 two- and 3-year-olds (77 female; Mean age = 3.04 years; 35.9% White, 12.5% Multiple ethnicities or races, 6.3% Asian, 3.1% Black, and 42.2% not reported) were presented with three emotion categories (Study 1 = happy, sad, angry; Study 2 = surprised, disgusted, afraid). Children sorted 30 images of adults posing stereotypical facial expressions into one of the three categories. Children were randomly assigned to either hear the emotion labels before sorting (e.g., “happy faces go here”) or were not given labels (e.g., “faces like this go here”). Study 1 results indicated no significant effects of labels for earlier-learned emotion categories, F(1, 60) = .94, p = .337, ηp2 = .013. However, the Study 2 results revealed that labels improved emotion categorization for later-learned categories, F(1, 60) = 8.15, p = .006, ηp2 = .024. Taken together, these results suggest that labels are important for emotion categorization, but the impact of labels may depend on children’s familiarity with the emotion category.

Dubow, Eric F.; Pérez-Edgar, Koraly

doi: 10.1037/dev0001451pmid: 35994020

Dys, Sebastian P.; Zuffianò, Antonio; Orsanska, Veronika; Zaazou, Nourhan; Malti, Tina

doi: 10.1037/dev0001380pmid: 35511517

Why do some children feel happy about violating ethical norms whereas others feel guilty? This study examined whether children’s attention to two types of competing cues during hypothetical transgressions related to their subsequent emotions. Eye tracking was used to test whether attending to other-oriented cues (i.e., a victim’s face) versus self-serving cues (e.g., a stolen good) related to kind and selfish emotions. Participants were 4-, 6-, and 8-year-olds (N = 224; Mage = 6.85 years; 51% girls), whose first language was primarily English (80%), and whose primary caregivers mainly reported backgrounds from Asia (40%) or Europe (39%). Overall, almost all children spend more time attending to selfish than other-oriented cues. Latent difference score modeling revealed that higher scores on attentional orientation (i.e., more other-oriented attention compared with self-serving attention or smaller gaps between the two) was significantly related to more kind, but not selfish emotions. This relation remained across age groups. Furthermore, with age, children attended somewhat less to self-serving cues. These findings highlight attention’s importance in developing kind emotions.

Carretti, Barbara; Giofrè, David; Toffalini, Enrico; Cornoldi, Cesare; Pastore, Massimiliano; Lanfranchi, Silvia

doi: 10.1037/dev0001385pmid: 35666924

Several models of working memory (WM) have been proposed in the literature. Most of the research on the architecture of WM is based on adults or older children, but less is known about younger children. In this study, we tested various models of WM on a sample of 739 Italian children, ranging in age from 3 to 8 years, primarily of European heritage and from medium to medium–high socioeconomic background. Participants were assessed with 12 WM tasks, systematically varying the modality and level of executive control required (based on the number of activities to be performed at once: retention alone, ignoring distractors, and dealing with dual tasks). We examined younger children (n = 501, Mage = 56.8 months, SD = 6.4, 48% boys) and older children (n = 238, Mage = 80.0 months, SD = 9.0, 58% boys) separately using multigroup confirmatory factor analyses. A Bayesian analytical approach was adopted. Our results suggested that a four-factor model distinguishing between verbal, visual, spatial–simultaneous, and spatial–sequential components of WM achieved the best fit. Overall, the WM structure was very similar in the two groups. We further explored this result with an additional model with a central executive factor loaded on high-control tasks only and found evidence for the presence of an executive control component. The contribution of this factor in terms of explained variance was only modest, however. Our findings demonstrate that it is important to distinguish between WM components in young children.

Hurst, Michelle A.; Butts, Jacob R.; Levine, Susan C.

doi: 10.1037/dev0001384pmid: 35511519

Fractions are a challenging mathematics topic for many elementary and middle school students, and even for adults. However, a growing body of developmental research suggests that young children can reason about visually presented proportions, well before fraction instruction, providing insight into how fractions might be introduced to improve learning. We designed a card game to teach first and second grade children (N = 195, including a racially and economically diverse sample from the United States) about fractions in one of three ways. In the Actively Divided condition we iteratively divided an area model into equal-sized units, in the Predivided condition we used an area model with the end-state of the Actively Divided condition, and in the Nondivided condition we used a continuous representation of the fraction magnitude that was not divided into unit-sized parts. Children in the actively divided condition demonstrated larger improvements matching symbolic fractions and visual fractions (i.e., pie charts) than children in the other two conditions. Posthoc analyses of children’s gameplay revealed that the actively divided condition may have provided a more optimal level of difficulty for young children than the predivided condition, which was particularly difficult, and the nondivided condition, which was trivially easy. These differences in gameplay performance provide insights into possible mechanisms for our results. We discuss open research questions highlighted by this work and implications of these findings for both the development of proportional reasoning and fraction learning.

Delgado, Hernán; Aldecosea, Carina; Menéndez, Ñeranei; Rodríguez, Richard; Nin, Verónica; Lipina, Sebastián; Carboni, Alejandra

doi: 10.1037/dev0001382pmid: 35446070

Future-oriented decision-making is an important adaptive behavior. In the present study, we examined whether decision-making varies as a function of socioeconomic status (SES) using the Children’s Gambling task (CGT). We administered the CGT to 227 children (49% female, 48% low SES) between the ages of 5 and 7 years. After completing the CGT, we assessed children’s knowledge of the reward/loss contingencies. Data analysis was conducted through multilevel modeling. Fluid intelligence, as measured by the Test of Nonverbal Intelligence, was included as a covariate in the analysis. Overall performance differed between SES groups. Children from middle/high-SES backgrounds learned to choose more from the deck with higher future reward. In contrast, children in the low-SES group did not act in a full future-oriented manner. No differences were found in the level of explicit understanding of the task reached by the two SES groups. Whereas middle/high-SES children with higher knowledge of the game performed better on the last blocks of the task in comparison with their same-SES peers with no understanding, low-SES children with higher explicit knowledge did not exhibit an improvement in their decision-making strategy in comparison with their same-SES low-awareness counterparts. Fluid intelligence did not predict CGT performance, suggesting that SES differences were not mediated by reasoning capabilities. The finding that children from low-SES families continued exhibiting an immediate reward-oriented strategy despite being aware of deck contingencies fits with (although speculatively) the evolutionary-developmental framework.