Karen E Adolph
Biographic Data
| ID | 227771 |
|---|---|
| NAME | Karen E Adolph |
| GIVEN NAMES | Karen E |
| FAMILY NAME | Adolph |
| SIGNATURE | ADOLPH K E |
| AFFILIATIONS | New York University |
| ORCID | 0000-0003-2819-134X |
| VERIFIED | Yes |
| TOTAL WORKS | 41 |
| TOTAL CITATIONS | 66 |
| AUTHOR COUNT | 41 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1992 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 4 |
How infants learn (to walk): Transitions are a fundamental component of practice
Learning to walk-like learning any motor skill-requires practice. But what are the critical components of infants' natural practice regimen? Traditionally, researchers focus on practicing the target behavior (e.g., days since walk onset, number of steps/hr). However, part of what makes skills truly functional is the ability to enter the task space (here, transitions from nonupright to upright postures), produce and pause the target behavior (tran…
Risky actions: Why and how to estimate variability in motor performance
Comparing apples to manzanas and oranges to naranjas: A new measure of English‐Spanish vocabulary for dual language learners
The valid assessment of vocabulary development in dual‐language‐learning infants is critical to developmental science. We developed the Dual Language Learners English‐Spanish (DLL‐ES) Inventories to measure vocabularies of U.S. English‐Spanish DLLs. The inventories provide translation equivalents for all Spanish and English items on Communicative Development Inventory (CDI) short forms; extended inventories based on CDI long forms; and Spanish la…
Variations in infants’ physical and social environments shape spontaneous locomotion
Independent locomotion is associated with a range of positive developmental outcomes, but unlike cognitive, linguistic, and social skills, acquiring motor skills requires infants to generate their own input for learning. We tested factors that shape infants' spontaneous locomotion by observing forty 12- to 22-month-olds (19 girls, 21 boys) during free play. Infants were recruited from the New York City area, and caregivers reported that 25 infant…
Gahvora cradling in Tajikistan: Cultural practices and associations with motor development
In Tajikistan, infants are bound supine in a “gahvora” cradle that severely restricts movement. Does cradling affect motor development and body growth? In three studies (2013–2018), we investigated associations between time in the gahvora (within days and across age) and motor skills and flattened head dimensions in 8–24-month-old Tajik infants (N = 269, 133 girls, 136 boys)) and 4.3–5.1-year-old children (N = 91, 53 girls, 38 boys). Infants had …
Infant exuberant object play at home: Immense amounts of time-distributed, variable practice
Object play yields enormous benefits for infant development. However, little is known about natural play at home where most object interactions occur. We conducted frame-by-frame video analyses of spontaneous activity in two 2-h home visits with 13-month-old crawling infants and 13-, 18-, and 23-month-old walking infants (N = 40; 21 boys; 75% White). Regardless of age, for every infant and time scale, across 10,015 object bouts, object interactio…
Flexibility in action: Development of locomotion under overhead barriers
Behavioral flexibility-the ability to tailor motor actions to changing body-environment relations-is critical for functional movement. Navigating the everyday environment requires the ability to generate a wide repertoire of actions, select the appropriate action for the current situation, and implement it quickly and accurately. We used a new, adjustable barrier paradigm to assess flexibility of motor actions in 20 17-month-old (eight girls, 12 …
Mothers talk about infants’ actions: How verbs correspond to infants’ real-time behavior
Infants learn nouns during object-naming events-moments when caregivers name the object of infants' play (e.g., ball as infant holds a ball). Do caregivers also label the actions of infants' play (e.g., roll as infant rolls a ball)? We investigated connections between mothers' verb inputs and infants' actions. We video-recorded 32 infant-mother dyads for 2 hr at home (13 month olds, n = 16; 18 month olds, n = 16; girls, n = 16; White, n = 23; Asi…
“Dancing” Together: Infant–Mother Locomotor Synchrony
Pre-mobile infants and caregivers spontaneously engage in a sequence of contingent facial expressions and vocalizations that researchers have referred to as a social “dance.” Does this dance continue when both partners are free to move across the floor? Locomotor synchrony was assessed in 13- to 19-month-old infant–mother dyads (N = 30) by tracking each partner’s step-to-step location during free play. Although infants moved more than mothers, dy…
Where Infants Go: Real-Time Dynamics of Locomotor Exploration in Crawling and Walking Infants
Where do infants go? A longstanding assumption is that infants primarily crawl or walk to reach destinations viewed while stationary. However, many bouts of spontaneous locomotion do not end at new people, places, or things. Study 1 showed that half of 10- and 13-month-old crawlers’ (N = 29) bouts end at destinations—more than previously found with walkers. Study 2 confirmed that, although infants do not commonly go to destinations, 12-month-old …
Oh, Behave: Presidential Address, XXTH International Conference on Infant Studies New Orleans, La, Us May 2016
Behavior is essential for understanding infant learning and development. Although behavior is transient and ephemeral, we have the technology to make it tangible and enduring. Video uniquely captures and preserves the details of behavior and the surrounding context. By sharing videos for documentation and data reuse, we can exploit the tremendous opportunities provided by infancy research and overcome the important challenges in studying behavior…
An Ecological Approach to Learning in (Not and) Development
The ecological approach is a framework for studying the behavior of animals in their environments. My version of an ecological approach focuses on learning in the context of development. I argue that the most important thing animals learn is behavioral flexibility. They must acquire the ability to flexibly guide their behavior from moment to moment in the midst of developmental changes in their bodies, brains, skills, and environments. They must …
Object Interaction and Walking: Integration of Old and New Skills in Infant Development
Manual skills such as reaching, grasping, and exploring objects appear months earlier in infancy than locomotor skills such as walking. To what extent do infants incorporate an old skill (manual actions on objects) into the development of a new skill (walking)? We video recorded 64 sessions of infants during free play in a laboratory playroom. Infants’ age (12.7–19.5 months), walking experience (0.5–10.3 months), and walking proficiency (speed, s…
Fear in infancy: Lessons from snakes, spiders, heights, and strangers
This review challenges the traditional interpretation of infants' and young children's responses to three types of potentially "fear-inducing" stimuli-snakes and spiders, heights, and strangers. The traditional account is that these stimuli are the objects of infants' earliest developing fears. We present evidence against the traditional account, and provide an alternative explanation of infants' behaviors toward each stimulus. Specifically, we p…
Motor Development: Embodied, Embedded, Enculturated, and Enabling
Motor development and psychological development are fundamentally related, but researchers typically consider them separately. In this review, we present four key features of infant motor development and show that motor skill acquisition both requires and reflects basic psychological functions. ( a) Motor development is embodied: Opportunities for action depend on the current status of the body. ( b) Motor development is embedded: Variations in t…
Video can make behavioural science more reproducible
Free Viewing Gaze Behavior in Infants and Adults
The current study investigated age differences in free viewing gaze behavior. Adults and 6‐, 9‐, 12‐, and 24‐month‐old infants watched a 60‐sec S esame S treet video clip while their eye movements were recorded. Adults displayed high intersubject consistency in eye movements; they tended to fixate the same places at the same. Infants showed weaker consistency between observers and intersubject consistency increased with age. Across age groups, th…
The development of tool use: Planning for end-state comfort
Some grips on the handle of a tool can be planned on the basis of information directly available in the scene. Other grips, however, must be planned on the basis of the final position of the hand. "End-state comfort" grips require an awkward or uncomfortable initial grip so as to later implement the action comfortably and efficiently. From a cognitive perspective, planning for end-state comfort requires a consistent representation of the entire a…
Gibson's Theory of Perceptual Learning
Places and Postures: A Cross-Cultural Comparison of Sitting in 5-Month-Olds
Motor development-traditionally described in terms of age-related stages-is typically studied in the laboratory with participants of Western European descent. Cross-cultural studies typically focus on group differences in age-related stages relative to Western norms. We adopted a less traditional approach: We observed 5-month-olds and their mothers from six cultural groups around the world during 1 hr at home while they engaged in natural daily a…
What Cruising Infants Understand about Support for Locomotion
“Cruising” infants can only walk using external support to augment their balance. We examined cruisers' understanding of support for upright locomotion under four conditions: cruising over a wooden handrail at chest height, a large gap in the handrail, a wobbly unstable handrail, and an ill‐positioned low handrail. Infants distinguished among the support properties of the handrails with differential attempts to cruise and handrail‐specific forms …
Postural Position Constrains Multimodal Object Exploration in Infants
Recent research has revealed the important role of multimodal object exploration in infants' cognitive and social development. Yet, the real‐time effects of postural position on infants' object exploration have been largely ignored. In the current study, 5‐ to 7‐month‐old infants ( N = 29) handled objects while placed in supported sitting, supine, and prone postures, and their spontaneous exploratory behaviors were observed. Infants produced more…
Planning an Action: A Developmental Progression in Tool Use
How children pick up a tool reveals their ability to plan an action with the end goal in mind. When presented with a spoon whose handle points away from their dominant hand, children between infancy and 8 years of age progress from using an awkward ulnar grip that causes food to spill from the spoon to consistently using a radial grip. At 4 years of age children's grip strategies are highly variable, including the awkward grips of infancy and use…
Affordances as Probabilistic Functions: Implications for Development, Perception, and Decisions for Action
We propose a new way to describe affordances for action. Previous characterizations of affordances treat action possibilities as binary categories-either possible or impossible-separated by a critical point. Here, we show that affordances are probabilistic functions, thus accounting for variability in motor performance. By measuring an affordance function, researchers can describe the likelihood of success for every unit of the environment. We de…
Carry on: Spontaneous object carrying in 13-month-old crawling and walking infants
Carrying objects requires coordination of manual action and locomotion. This study investigated spontaneous carrying in 24 walkers who were 13 months old and 26 crawlers who were 13 months old during 1-hr, naturalistic observations in the infants' homes. Carrying was more common in walkers, but crawlers also carried objects. Typically, walkers carried objects in their hands, whereas crawlers multitasked by using their hands simultaneously for hol…
Motor Development: Embodied, Embedded, Enculturated, and Enabling
Motor development and psychological development are fundamentally related, but researchers typically consider them separately. In this review, we present four key features of infant motor development and show that motor skill acquisition both requires and reflects basic psychological functions. ( a) Motor development is embodied: Opportunities for action depend on the current status of the body. ( b) Motor development is embedded: Variations in t…
Systems in development: Motor skill acquisition facilitates three-dimensional object completion
How do infants learn to perceive the backs of objects that they see only from a limited viewpoint? Infants' 3-dimensional object completion abilities emerge in conjunction with developing motor skills--independent sitting and visual-manual exploration. Infants at 4.5 to 7.5 months of age (n = 28) were habituated to a limited-view object and tested with volumetrically complete and incomplete (hollow) versions of the same object. Parents reported i…
When infants take mothers' advice: 18-Month-Olds Integrate Perceptual and Social Information to Guide Motor Action
The social cognition and perception-action literatures are largely separate, both conceptually and empirically. However, both areas of research emphasize infants' emerging abilities to use available information--social and perceptual information, respectively--for making decisions about action. Borrowing methods from both research traditions, this study examined whether 18-month-old infants incorporate both social and perceptual information in th…
Arnold L. Gesell: The paradox of nature and nurture
Arnold Gesell (1880-1961) has had an important and lasting impact on the field of developmental psychology. He is best remembered for his developmental norms, which were acquired from decades of detailed observations of infants and children and are still the basis of most early assessments of behavioral functioning. Gesell's influence as a theorist is less direct. His maturationism quickly lost favor in the intellectual climate of Piaget, behavio…
Places and Postures: A Cross-Cultural Comparison of Sitting in 5-Month-Olds
Motor development-traditionally described in terms of age-related stages-is typically studied in the laboratory with participants of Western European descent. Cross-cultural studies typically focus on group differences in age-related stages relative to Western norms. We adopted a less traditional approach: We observed 5-month-olds and their mothers from six cultural groups around the world during 1 hr at home while they engaged in natural daily a…
Flexibility in action: Development of locomotion under overhead barriers
Behavioral flexibility-the ability to tailor motor actions to changing body-environment relations-is critical for functional movement. Navigating the everyday environment requires the ability to generate a wide repertoire of actions, select the appropriate action for the current situation, and implement it quickly and accurately. We used a new, adjustable barrier paradigm to assess flexibility of motor actions in 20 17-month-old (eight girls, 12 …
What infants know and what they do: Perceiving possibilities for walking through openings
What infants decide to do does not necessarily reflect the extent of what they know. In the current study, 17-month-olds were encouraged to walk through openings of varying width under risk of entrapment. Infants erred by squeezing into openings that were too small and became stuck, suggesting that they did not accurately perceive whether they could fit. However, a second penalty condition revealed accurate action selection when errors resulted i…
Locomotor experience and use of social information are posture specific
The authors examined the effects of locomotor experience on infants' perceptual judgments in a potentially risky situation--descending steep and shallow slopes--while manipulating social incentives to determine where perceptual judgments are most malleable. Twelve-month-old experienced crawlers and novice walkers were tested on an adjustable sloping walkway as their mothers encouraged and discouraged descent. A psychophysical procedure was used t…
Infants use handrails as tools in a locomotor task
In 2 experiments the authors demonstrated that adaptive locomotion can involve means-ends problem solving. Sixteen-month-old toddlers crossed bridges of varying widths in the presence or absence of a handrail. Babies attempted wider bridges more often than narrow ones, and attempts on narrow bridges depended on handrail presence. Toddlers had longer latencies, examined the bridge and handrail more closely, and modified their gait when bridges wer…
Mothers talk about infants’ actions: How verbs correspond to infants’ real-time behavior
Infants learn nouns during object-naming events-moments when caregivers name the object of infants' play (e.g., ball as infant holds a ball). Do caregivers also label the actions of infants' play (e.g., roll as infant rolls a ball)? We investigated connections between mothers' verb inputs and infants' actions. We video-recorded 32 infant-mother dyads for 2 hr at home (13 month olds, n = 16; 18 month olds, n = 16; girls, n = 16; White, n = 23; Asi…
Fear in infancy: Lessons from snakes, spiders, heights, and strangers
This review challenges the traditional interpretation of infants' and young children's responses to three types of potentially "fear-inducing" stimuli-snakes and spiders, heights, and strangers. The traditional account is that these stimuli are the objects of infants' earliest developing fears. We present evidence against the traditional account, and provide an alternative explanation of infants' behaviors toward each stimulus. Specifically, we p…
Carry on: Spontaneous object carrying in 13-month-old crawling and walking infants
Carrying objects requires coordination of manual action and locomotion. This study investigated spontaneous carrying in 24 walkers who were 13 months old and 26 crawlers who were 13 months old during 1-hr, naturalistic observations in the infants' homes. Carrying was more common in walkers, but crawlers also carried objects. Typically, walkers carried objects in their hands, whereas crawlers multitasked by using their hands simultaneously for hol…
Video can make behavioural science more reproducible
The development of tool use: Planning for end-state comfort
Some grips on the handle of a tool can be planned on the basis of information directly available in the scene. Other grips, however, must be planned on the basis of the final position of the hand. "End-state comfort" grips require an awkward or uncomfortable initial grip so as to later implement the action comfortably and efficiently. From a cognitive perspective, planning for end-state comfort requires a consistent representation of the entire a…
Ensuring Safety and Providing Challenge: Mothers' and Fathers' Expectations and Choices About Infant Locomotion
SYNOPSIS Objective. We examined how parents’ expectations about their infants’ crawling ability and crawling attempts in a locomotor task affect parenting choices about ensuring infants’ safety and providing appropriate challenges. Design. Mothers and fathers of 34 11-month-old infants adjusted a ramp to the steepest slopes they thought their infants could safely crawl down, would attempt to crawl down, and they would allow their infants to crawl…
Arnold L. Gesell: The paradox of nature and nurture
Arnold Gesell (1880-1961) has had an important and lasting impact on the field of developmental psychology. He is best remembered for his developmental norms, which were acquired from decades of detailed observations of infants and children and are still the basis of most early assessments of behavioral functioning. Gesell's influence as a theorist is less direct. His maturationism quickly lost favor in the intellectual climate of Piaget, behavio…
Toward and Ecological Approach to Perceptual Learning and Development: Commentary on Michaels and Beek
(1996). Toward and Ecological Approach to Perceptual Learning and Development: Commentary on Michaels and Beek. Ecological Psychology: Vol. 8, No. 4, pp. 353-355
Development of Visually Guided Locomotion
This article presents a developmental account of changes in the visual guidance of locomotion. In contrast to the impressive efficiency of adult locomotion, locomotor activity is not under prospective control at the onset of human mobility. Infants require extensive crawling and walking experience before responding adaptively to variations in the terrain. At the same time that they are learning to navigate in increasingly varied environments, the…
Development of Visually Guided Locomotion
Infants use handrails as tools in a locomotor task
In 2 experiments the authors demonstrated that adaptive locomotion can involve means-ends problem solving. Sixteen-month-old toddlers crossed bridges of varying widths in the presence or absence of a handrail. Babies attempted wider bridges more often than narrow ones, and attempts on narrow bridges depended on handrail presence. Toddlers had longer latencies, examined the bridge and handrail more closely, and modified their gait when bridges wer…
Esther Thelen
Esther Thelen (1941-2004)
No! Don't! Stop: Mothers' Words for Impending Danger
SYNOPSIS Objectives. In 2 studies, we aimed to describe the content of mothers’ verbal warnings to their young children and to investigate whether mothers modify their warnings based on the type of dangerous situation and children’s age. Study 1. Mothers of 12-, 18-, and 24-month-olds reported in a telephone interview the words and phrases they would use to prevent their children from falling, touching dangerous objects, ingesting poisonous subst…
Ensuring Safety and Providing Challenge: Mothers' and Fathers' Expectations and Choices About Infant Locomotion
SYNOPSIS Objective. We examined how parents’ expectations about their infants’ crawling ability and crawling attempts in a locomotor task affect parenting choices about ensuring infants’ safety and providing appropriate challenges. Design. Mothers and fathers of 34 11-month-old infants adjusted a ramp to the steepest slopes they thought their infants could safely crawl down, would attempt to crawl down, and they would allow their infants to crawl…
No! Don't! Stop!”: Mothers' Words for Impending Danger
SYNOPSIS Objectives. In 2 studies, we aimed to describe the content of mothers’ verbal warnings to their young children and to investigate whether mothers modify their warnings based on the type of dangerous situation and children's age. Study 1. Mothers of 12-, 18-, and 24-month-olds reported in a telephone interview the words and phrases they would use to prevent their children from falling, touching dangerous objects, ingesting poisonous subst…
How Mothers Encourage and Discourage Infants' Motor Actions
The content of mothers' emotional, verbal, and gestural communication to their infants was examined under conditions of potential physical risk in a laboratory motor task. Mothers encouraged and discouraged their 12‐ and 18‐month‐old infants to crawl or walk down a sloping walkway. Mothers expressed positive affect on nearly every trial. They rarely expressed purely negative affect in their faces and voices, even when discouraging. Instead, they …
Locomotor experience and use of social information are posture specific
The authors examined the effects of locomotor experience on infants' perceptual judgments in a potentially risky situation--descending steep and shallow slopes--while manipulating social incentives to determine where perceptual judgments are most malleable. Twelve-month-old experienced crawlers and novice walkers were tested on an adjustable sloping walkway as their mothers encouraged and discouraged descent. A psychophysical procedure was used t…
When infants take mothers' advice: 18-Month-Olds Integrate Perceptual and Social Information to Guide Motor Action
The social cognition and perception-action literatures are largely separate, both conceptually and empirically. However, both areas of research emphasize infants' emerging abilities to use available information--social and perceptual information, respectively--for making decisions about action. Borrowing methods from both research traditions, this study examined whether 18-month-old infants incorporate both social and perceptual information in th…
Cinderella indeed – a commentary on Iverson's ‘Developing language in a developing body: The relationship between motor development and language development’
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Systems in development: Motor skill acquisition facilitates three-dimensional object completion
How do infants learn to perceive the backs of objects that they see only from a limited viewpoint? Infants' 3-dimensional object completion abilities emerge in conjunction with developing motor skills--independent sitting and visual-manual exploration. Infants at 4.5 to 7.5 months of age (n = 28) were habituated to a limited-view object and tested with volumetrically complete and incomplete (hollow) versions of the same object. Parents reported i…
Carry on: Spontaneous object carrying in 13-month-old crawling and walking infants
Carrying objects requires coordination of manual action and locomotion. This study investigated spontaneous carrying in 24 walkers who were 13 months old and 26 crawlers who were 13 months old during 1-hr, naturalistic observations in the infants' homes. Carrying was more common in walkers, but crawlers also carried objects. Typically, walkers carried objects in their hands, whereas crawlers multitasked by using their hands simultaneously for hol…
What infants know and what they do: Perceiving possibilities for walking through openings
What infants decide to do does not necessarily reflect the extent of what they know. In the current study, 17-month-olds were encouraged to walk through openings of varying width under risk of entrapment. Infants erred by squeezing into openings that were too small and became stuck, suggesting that they did not accurately perceive whether they could fit. However, a second penalty condition revealed accurate action selection when errors resulted i…
What Cruising Infants Understand about Support for Locomotion
“Cruising” infants can only walk using external support to augment their balance. We examined cruisers' understanding of support for upright locomotion under four conditions: cruising over a wooden handrail at chest height, a large gap in the handrail, a wobbly unstable handrail, and an ill‐positioned low handrail. Infants distinguished among the support properties of the handrails with differential attempts to cruise and handrail‐specific forms …
Postural Position Constrains Multimodal Object Exploration in Infants
Recent research has revealed the important role of multimodal object exploration in infants' cognitive and social development. Yet, the real‐time effects of postural position on infants' object exploration have been largely ignored. In the current study, 5‐ to 7‐month‐old infants ( N = 29) handled objects while placed in supported sitting, supine, and prone postures, and their spontaneous exploratory behaviors were observed. Infants produced more…
Planning an Action: A Developmental Progression in Tool Use
How children pick up a tool reveals their ability to plan an action with the end goal in mind. When presented with a spoon whose handle points away from their dominant hand, children between infancy and 8 years of age progress from using an awkward ulnar grip that causes food to spill from the spoon to consistently using a radial grip. At 4 years of age children's grip strategies are highly variable, including the awkward grips of infancy and use…
Affordances as Probabilistic Functions: Implications for Development, Perception, and Decisions for Action
We propose a new way to describe affordances for action. Previous characterizations of affordances treat action possibilities as binary categories-either possible or impossible-separated by a critical point. Here, we show that affordances are probabilistic functions, thus accounting for variability in motor performance. By measuring an affordance function, researchers can describe the likelihood of success for every unit of the environment. We de…
Gibson's Theory of Perceptual Learning
Places and Postures: A Cross-Cultural Comparison of Sitting in 5-Month-Olds
Motor development-traditionally described in terms of age-related stages-is typically studied in the laboratory with participants of Western European descent. Cross-cultural studies typically focus on group differences in age-related stages relative to Western norms. We adopted a less traditional approach: We observed 5-month-olds and their mothers from six cultural groups around the world during 1 hr at home while they engaged in natural daily a…
Free Viewing Gaze Behavior in Infants and Adults
The current study investigated age differences in free viewing gaze behavior. Adults and 6‐, 9‐, 12‐, and 24‐month‐old infants watched a 60‐sec S esame S treet video clip while their eye movements were recorded. Adults displayed high intersubject consistency in eye movements; they tended to fixate the same places at the same. Infants showed weaker consistency between observers and intersubject consistency increased with age. Across age groups, th…
The development of tool use: Planning for end-state comfort
Some grips on the handle of a tool can be planned on the basis of information directly available in the scene. Other grips, however, must be planned on the basis of the final position of the hand. "End-state comfort" grips require an awkward or uncomfortable initial grip so as to later implement the action comfortably and efficiently. From a cognitive perspective, planning for end-state comfort requires a consistent representation of the entire a…
Psychology (37 works) · Child and Animal Learning Development (27 works) · Developmental psychology (25 works) · Cognitive psychology (20 works) · Computer Science (18 works) · Artificial Intelligence (14 works) · Medicine (12 works) · Communication (9 works) · Neuroscience (9 works) · Hearing Impairment and Communication (8 works)