Intervening on causal systems can illuminate their underlying structures. Past work has shown that, relative to adults, young children often make intervention decisions that appear to confirm a single hypothesis rather than those that optimally discriminate alternative hypotheses. Here, we investigated how the ability to make informative causal interventions changes across development. Ninety participants between the ages of 7 and 25 completed 40 different puzzles in which they had to intervene on various causal systems to determine their underlying structures. Each puzzle comprised a three‐ or four‐node computer chip with hidden wires. On each trial, participants viewed two possible arrangements of the chip's hidden wires and had to select a single node to activate. After observing the outcome of their intervention, participants selected a wire configuration and rated their confidence in their selection. We characterized participant choices with a Bayesian measurement model that indexed the extent to which participants selected nodes that would best disambiguate the two possible causal structures versus those that had high causal centrality in one of the two causal hypotheses but did not necessarily discriminate between them. Our model estimates revealed that the use of a discriminatory strategy increased through early adolescence. Further, developmental improvements in intervention strategy were related to changes in the ability to accurately judge the strength of evidence that interventions revealed, as indexed by participants' confidence in their selections. Our results suggest that improvements in causal information‐seeking extend into adolescence and may be driven by metacognitive sensitivity to the efficacy of previous interventions in discriminating competing ideas.
Previous research shows that children effectively extract and utilize causal information, yet we find that adults doubt children’s ability to understand complex mechanisms. Since adults themselves struggle to explain how everyday objects work, why expect more from children? Although remembering details may prove difficult, we argue that exposure to mechanism benefits children via the formation of abstract causal knowledge that supports epistemic evaluation. We tested 240 6–9 year-olds’ memory for concrete details and the ability to distinguish expertise before, immediately after, or a week after viewing a video about how combustion engines work. By around age 8, children who saw the video remembered mechanistic details and were better able to detect car-engine experts. Beyond detailed knowledge, the current results suggest that children also acquired an abstracted sense of how systems work that can facilitate epistemic reasoning.
more » « less- NSF-PAR ID:
- 10306252
- Publisher / Repository:
- Nature Publishing Group
- Date Published:
- Journal Name:
- npj Science of Learning
- Volume:
- 6
- Issue:
- 1
- ISSN:
- 2056-7936
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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Abstract Across the lifespan and across populations, humans ‘overimitate’ causally unnecessary behaviors. Such
irrelevant‐action imitation facilitates faithful cultural transmission, but its immediate benefits to the imitator are controversial. Over short time scales, irrelevant‐action imitation may bootstrap artifact exploration or interpersonal affiliation, and over longer time scales it may facilitate acquisition of either causal models or social conventions. To investigate these putative functions, we recruited community samples from two under‐studied populations: Yasawa, Fiji, and Huatasani, Peru. We use a two‐action puzzle box: first after a video demonstration, and again one month later. Treating age as a continuous variable, we reveal divergent developmental trajectories across sites. Yasawans (44 adults,M = 39.9 years, 23 women; 42 children,M = 9.8 years, 26 girls) resemble documented patterns, with irrelevant‐action imitation increasing across childhood and plateauing in adulthood. In contrast, Huatasaneños (48 adults,M = 37.6 years, 33 women; 47 children,M = 9.3 years, 13 girls) evince a parabolic trajectory: adults at the site show the lowest irrelevant‐action imitation of any demographic set in our sample. In addition, all age sets in both populations reduce their irrelevant actions at Time 2, but do not reduce their relevant‐action imitation or goal attainment. Taken together, and considering the local cultural contexts, our results suggest that irrelevant‐action imitation serves a short‐term function and is sensitive to the social context of the demonstration. -
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Abstract Background Research points to family talk and interactions involving STEM concepts as one of the most influential informal learning experiences that shape an individual's STEM identity development and encourage their pursuit of a STEM career. However, a recent literature review uncovers limited research regarding the development of engineering identity in young children.
Purpose The purpose of this study was to add to this scant literature by exploring how children position themselves as engineers and how children are positioned as engineers through interactions with parents and other adults within a program focused on family engagement within an engineering design process.
Methods This study includes two parent–child dyads. We collected and analyzed approximately 19.5 h of video data of the two child–parent dyads interacting with one another throughout an engineering design process as part of an out‐of‐school program.
Results Results highlight three ways in which the two children enacted various engineering identities through their positioning, negotiation, and acceptance and/or rejection of positionalities as they engaged in an engineering design process with a parent. These identity enactments included (a) possessing knowledge and authority to make decisions regarding the development of their self‐identified engineering problem and prototype; (b) questioning and challenging adult ideas, solutions, and construction of prototypes; and (c) documenting and communicating their thinking regarding the engineering design through sketches and notes.
Conclusions The significance of this study lies in its potential to change the landscape of those who pursue an engineering career and to contribute to the limited research and ongoing conversations about how to foster environments that support families in creative and collaborative learning specific to the engineering discipline.
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Abstract Music and language are two fundamental forms of human communication. Many studies examine the development of music‐ and language‐specific knowledge, but few studies compare how listeners know they are listening to music or language. Although we readily differentiate these domains, how we distinguish music and language—and especially speech and song— is not obvious. In two studies, we asked how listeners categorize speech and song. Study 1 used online survey data to illustrate that 4‐ to 17‐year‐olds and adults have verbalizable distinctions for speech and song. At all ages, listeners described speech and song differences based on acoustic features, but compared with older children, 4‐ to 7‐year‐olds more often used volume to describe differences, suggesting that they are still learning to identify the features most useful for differentiating speech from song. Study 2 used a perceptual categorization task to demonstrate that 4–8‐year‐olds and adults readily categorize speech and song, but this ability improves with age especially for identifying song. Despite generally rating song as more speech‐like, 4‐ and 6‐year‐olds rated ambiguous speech–song stimuli as more song‐like than 8‐year‐olds and adults. Four acoustic features predicted song ratings: F0 instability, utterance duration, harmonicity, and spectral flux. However, 4‐ and 6‐year‐olds’ song ratings were better predicted by F0 instability than by harmonicity and utterance duration. These studies characterize how children develop conceptual and perceptual understandings of speech and song and suggest that children under age 8 are still learning what features are important for categorizing utterances as speech or song.
Research Highlights Children and adults conceptually and perceptually categorize speech and song from age 4.
Listeners use F0 instability, harmonicity, spectral flux, and utterance duration to determine whether vocal stimuli sound like song.
Acoustic cue weighting changes with age, becoming adult‐like at age 8 for perceptual categorization and at age 12 for conceptual differentiation.
Young children are still learning to categorize speech and song, which leaves open the possibility that music‐ and language‐specific skills are not so domain‐specific.
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Abstract In this study, we address the mapping problem for modal words: how do children learn the form‐to‐ meaning mappings for words like
could orhave to in their input languages? Learning modal words poses considerable challenges as their meanings are conceptually complex and the way these meanings are mapped to grammatical forms and structures is likewise complex and cross‐linguistically variable. Against a backdrop of how cross‐linguistic modal systems can vary, we focus on new work highlighting the developmental roles of the following: (a) syntactic categories of modal words, (b) interrelationships between modal ‘force’ (possibility and necessity) and ‘flavour’ (root and epistemic), (c) semantic representations for modal forms and (d) children's own emerging modal systems, as a whole, which show that the way they map forms to the ‘modal meaning space’ (considering both force and flavour dimensions) diverges from how adults do, even if the same forms are present. Modality provides a rich natural laboratory for exploring the interrelationships between our conceptual world of possibilities, how concepts get packaged by the syntax–semantics of grammatical systems, and how child learners surmount these form‐meaning mapping challenges.
