Novel methodology to examine cognitive and experiential factors in language development: combining eye-tracking and LENA technology

Developmental systems theory posits that development cannot be segmented by influences acting in isolation, but should be studied through a scientific lens that highlights the complex interactions between these forces over time (Overton, 2013a). This poses a unique challenge for developmental psychologists studying complex processes like language development. In this paper, we advocate for the combining of highly sophisticated data collection technologies in an effort to move toward a more systemic approach to studying language development. We investigate the efficiency and appropriateness of combining eye-tracking technology and the LENA (Language Environment Analysis) system, an automated language analysis tool, in an effort to explore the relation between language processing in early development, and external dynamic influences like parent and educator language input in the home and school environments. Eye-tracking allows us to study language processing via eye movement analysis; these eye movements have been linked to both conscious and unconscious cognitive processing, and thus provide one means of evaluating cognitive processes underlying language development that does not require the use of subjective parent reports or checklists. The LENA system, on the other hand, provides automated language output that describes a child’s language-rich environment. In combination, these technologies provide critical information not only about a child’s language processing abilities but also about the complexity of the child’s language environment. Thus, when used in conjunction these technologies allow researchers to explore the nature of interacting systems involved in language development

A New Biomarker to Examine the Role of Hippocampal Function in the Development of Spatial Reorientation in Children: A Review

Spatial navigation is an adaptive skill that involves determining the route to a particular goal or location, and then traveling that path. A major component of spatial navigation is spatial reorientation, or the ability to reestablish a sense of direction after being disoriented. The hippocampus is known to be critical for navigating, and has more recently been implicated in reorienting in adults, but relatively little is known about the development of the hippocampus in relation to these large-scale spatial abilities in children. It has been established that, compared to school-aged children, preschool children tend to perform poorly on certain spatial reorientation tasks, suggesting that their hippocampi may not be mature enough to process the demands of such a task. Currently, common techniques used to examine underlying brain activity, such as electroencephalography (EEG) and functional magnetic resonance imaging (fMRI), are not suitable for examining hippocampal development in young children. In the present paper, we argue instead for the use of eyeblink conditioning (EBC), a relatively under-utilized, inexpensive, and safe method that is easy to implement in developing populations. In addition, EBC has a well defined neural circuitry, which includes the hippocampus, making it an ideal tool to indirectly measure hippocampal functioning in young children. In this review, we will evaluate the literature on EBC and its relation to hippocampal development, and discuss the possibility of using EBC as an objective measure of associative learning in relation to large-scale spatial skills. We support the use of EBC as a way to indirectly access hippocampal function in typical and atypical populations in order to characterize the neural substrates associated with the development of spatial reorientation abilities in early childhood. As such, EBC is a potential, simple biomarker for success in tasks that require the hippocampus, including spatial reorientation

Sex Differences in Gains Among Hispanic Pre-kindergartners’ Mental Rotation Skills

The current study explores change in mental rotation skills throughout the pre-kindergarten year in a Hispanic population to better understand the development of early sex differences in mental rotation. Ninety-six Hispanic children (M = 4 years 8 months) completed a mental rotation task at the beginning and end of pre-kindergarten. Results suggest Hispanic boys and girls differed in gains on mental rotation ability, with boys improving significantly more than girls during pre-kindergarten on a mental rotation task. This study highlights the significance of studying mental rotation abilities in a Hispanic population of pre-kindergarten aged children and suggests the importance of examining sex differences in mental rotation over time, rather than at one time-point, to better understand when sex differences in spatial skills develop. We discuss various factors that potentially affect the growth of spatial skills including the role of early education, spatial experiences, and spatial language input

Strategy Selection versus Flexibility:Using Eye-trackers to Investigate Strategy Use during Mental Rotation

Spatial researchers have been arguing over the optimum cognitive strategy for spatial problem-solving for several decades. The current article aims to shift this debate from strategy dichotomies to strategy flexibility-a cognitive process, which although alluded to in spatial research, presents practical methodological challenges to empirical testing. In the current study, participants' eye movements were tracked during a mental rotation task (MRT) using the Tobii x60 eye-tracker. Results of a latent profile analysis, combining different eye movement parameters, indicated two distinct eye-patterns-fixating and switching patterns. The switching eye-pattern was associated with high mental rotation performance. There were no sex differences in eye-patterns. To investigate strategy flexibility, we used a novel application of the changepoint detection algorithm on eye movement data. Strategy flexibility significantly predicted mental rotation performance. Male participants demonstrated higher strategy flexibility than did female participants. Our findings highlight the importance of strategy flexibility in spatial thinking and have implications for designing spatial training techniques. The novel approaches to analyzing eye movement data in the current paper can be extended to research beyond the spatial domain

Do Storybooks Really Break Children’s Gender Stereotypes?

A book review on An open book: What and how young children learn from picture and storybooks. Special Issue of Frontiers in Developmental Psychology. Edited by J.S. Horst and C. Houston-Pric

Understanding Young Children’s Mental Rotation Using Eye-Tracking

Mental rotation skills have been suggested to be an important contributor to success in various Science, Technology, Engineering and Math (STEM) fields. To help children succeed in STEM, a better understanding of the cognitive strategies they use to solve mental rotation tasks is needed. Two types of cognitive strategies exist. Holistic, defined as mentally rotating an object as a whole object, and piecemeal, defined as mentally rotating an object by its individual pieces or parts of the object rather than by the whole object (Pruden et al., 2020). Little is known about children’s use of these cognitive strategies during mental rotation tasks. The purpose the current study was to identify which cognitive strategy children were using to solve a mental rotation task by using their eye-tracking patterns to define their cognitive strategy. A total of 148 three- to seven-year-old children from the Miami Frost Science Museum completed a mental rotation task while having their eye-movements recorded with an eye-tracker. Data from the eye-tracker, including visit counts, visit duration, fixation counts, and fixation duration to the target and test images, were used to run a latent profile analysis to try to identify how children were solving the mental rotation task. Prior research with adults (Nazareth et al., 2019) shows that a holistic cognitive strategy was defined by fewer fixation counts and visit counts, while a piecemeal cognitive strategy was defined by more fixation counts and visit counts. Two class types were identified in our sample. Class 1, identified as using a holistic cognitive strategy, had significantly fewer visit counts, fewer fixation counts and a smaller visit duration average. Class 2, identified as using a piecemeal cognitive strategy, had more visit counts, more fixation counts, and a greater visit duration average. Fixation duration did not help to define a class or define one’s cognitive strategy. Results suggest that eye-tracking data can identify how young children solve mental rotation tasks. Like prior research with adults (Nazareth et al., 2019), we found evidence that children’s eye-tracking patterns define two groups who are using two different types of cognitive strategies to solve the task

Individual differences in preschoolers' spatial thinking: Comprehension of dimensional adjectives and their relation to children's performance on non-verbal spatial tasks

The current study explores whether individual differences in the dimensional adjectives (e.g., big, tall) children understand, relates to individual differences in two non-verbal spatial abilities, an extrinsic spatial task (i.e., spatial scaling) and an intrinsic spatial task (i.e., mental rotation) in two studies that looked at spatial scaling and mental transformations respectively. Ninety-two Spanish-English bilingual children between 37.65 and 71.87 months (42 male) participated in Study 1 and with 79 of the children aged 48- to 72-months (40 male) also participating in study 2. Results show number of dimensional adjectives preschool children comprehend utilizing a new interactive, tablet-based task relates to performance on non-verbal spatial tasks. Children may use language when solving spatial tasks, or language may be indicative of overall stronger understanding of spatial relations

Intersensory redundancy promotes infant detection of prosody in infant-directed speech

Prosody, or the intonation contours of speech, conveys emotion and intention to the listener and provides infants with an early basis for detecting meaning in speech. Infant-directed speech (IDS) is characterized by exaggerated prosody, slower tempo, and elongated pauses, all amodal properties detectable across the face and voice. Although speech is an audiovisual event, it has been studied primarily as a unimodal auditory stream without the synchronized dynamic face of the speaker. According to the intersensory redundancy hypothesis, redundancy across the senses facilitates perceptual learning of amodal information, including prosody. We predicted that young infants who are still learning to discriminate and categorize prosodic information would detect prosodic changes better in the presence of intersensory redundancy (i.e., synchronous audiovisual speech) than in its absence (i.e., unimodal auditory or asynchronous audiovisual speech). To test this hypothesis, 72 4-month-old infants were habituated to recordings of women reciting passages in IDS with prosody conveying either approval or prohibition and then were tested with recordings of a novel passage with either a change or no change in prosody. Infants who received bimodal synchronous stimulation exhibited significant visual recovery to the novel passage with a change in prosody, but not to a novel passage with no change in prosody. Infants in the unimodal auditory and bimodal asynchronous conditions did not exhibit visual recovery in either condition. Results support the hypothesis that intersensory redundancy facilitates detection and abstraction of invariant prosody across changes in linguistic content and likely serves as an early foundation for the detection of meaning in fluent speech

A world of relations: Relational words

Children climb on jungle gyms, run around trees, and kiss their parents. The everyday world in which we live is fundamentally dynamic, with events defined in terms of the relations that objects have to actions. When we label these events and relations, we use relational words that come in all forms. They can be nouns such as brother, island, and passenge