Maria Legerstee
Biographic Data
| ID | 5758185 |
|---|---|
| NAME | Maria Legerstee |
| GIVEN NAMES | Maria |
| FAMILY NAME | Legerstee |
| SIGNATURE | LEGERSTEE M |
| AFFILIATIONS | York University |
| VERIFIED | No |
| TOTAL WORKS | 11 |
| TOTAL CITATIONS | 18 |
| WORKS AS AUTHOR | 11 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1991 |
| LATEST PUBLICATION YEAR | 2015 |
| H-INDEX | 3 |
Goal-Oriented Behaviour Among Human and Non-Human Primates
Six‐ and 9‐Month‐Old Infants Discriminate Between Goals Despite Similar Action Patterns
Behne, Carpenter, Call, and Tomasello (2005) showed that 9‐ to 18‐month‐olds, but not 6‐month‐olds, differentiated between people who were unwilling and unable to share toys. As the outcome of the two tasks is the same (i.e., the toy is not shared), the infants must respond to the different goals of the actor. However, visual habituation paradigms have shown an earlier onset of goal awareness. The present study reconciles this disparity by replic…
Coordinated attention, declarative and imperative pointing in infants with and without Down syndrome
The link between coordinated attention, imperative and declarative pointing was assessed in a longitudinal study. Four groups of infants were studied in interaction with their mothers, a same-aged peer and the peer's mother. Two groups of infants had Down syndrome (DS), one ( n = 11) with a mean mental age (MA) of 0;8.6 and the other ( n = 11) with an MA of 1;4.5. These infants were matched on MA with two groups ( n = 10 each) of typically develo…
Contingency, imitation, and affect sharing
Predictions about the role of contingency, imitation, and affect sharing in the development of social awareness were tested in infants during natural, imitative, and yoked conditions with their mothers at 5 and 13 weeks of age. Results showed that at both ages, infants of highly attuned mothers gazed, smiled, and vocalized positively more during the natural than during the imitative and yoked conditions, whereas they increased negative vocalizati…
The role of modelling and request type on symbolic comprehension of objects and gestures in young children
In a first study, we considered whether modelling and the type of an adult's request influenced children's ability at 1;8 and 2;2 to comprehend gestures and replica objects as symbols for familiar objects. In a second study, we evaluated whether modelling and type of request influenced children's ability at 1;8 ( N =24) to understand unfamiliar (i.e. unconventional) objects as symbols. Results of Study 1 indicated that children at 2;2 comprehende…
Effects of maintaining and redirecting infant attention on the production of referential communication in infants with and without Down syndrome
The effects of maternal interactive styles on the production of referential communication were assessed in four groups of infants whose chronological ages ranged between 0;6 and 1;8. Two groups of infants with Down syndrome (DS), one ( n = 11) with a mean mental age (MA) of 0;8.6, and the other ( n = 11) of 1;4.5, were matched on MA with two groups ( n = 10 each) of typically developing infants. Infants were seen bi-monthly, for 8 months, with mo…
Six-month-old infants rely on explanatory inference when relating communication to people and manipulatory actions to inanimate objects
Six-month-old infants expect people to talk to persons, but they expect people to manipulate objects (M. Legerstee, J. Barna, & C. DiAdamo, 2000). This interpretation of the behavior of 6-month-olds is consistent with both (a) the task requirements in M. Legerstee et al.'s (2000) study and (b) previous empirical and theoretical work that supports the conclusion that infants use explanatory inferences to make sense of the world during the first 6 …
Precursors to the development of intention at 6 months
Under investigation was whether 6-month-old infants expect people to behave differently toward persons and inanimate objects. Infants were randomly assigned to experimental and control conditions. In the experimental conditions, infants were habituated to an actor who either talked to or reached for and swiped with something hidden behind an occluder. In the test events the actor was occluded, but the infants were shown either a person or an obje…
Contingency Effects of People and Objects on Subsequent Cognitive Functioning in Three-month-old Infants
Contingency Effects of People and Objects on Subsequent Cognitive Functioning in Three‐month‐old Infants
Three month‐old infants' responses to persons and objects who interacted with the infant at two levels of contingency were contrasted in two experiments. In experiment 1, contingent responding of people and objects was controlled. In experiment 2, the faciallvocal dynamics were controlled as well as contingent responding. In both experiments, contingent interaction had different effects on infants depending on whether the “actor” was a person or …
Changes in the quality of infant sounds as a function of social and nonsocial stimulation
The vocalizations of eight infants were recorded longitudinally in relation to different social and nonsocial contexts. The infants were observed bi-weekly from 3 to 25 weeks. At each visit they were presented with their mother, a female stranger and a doll, who were alternately active and passive. The results showed that by 7 weeks the infant vocalizations could be categorized from the social perception of adults into relatively long sounds cont…
Contingency, imitation, and affect sharing
Predictions about the role of contingency, imitation, and affect sharing in the development of social awareness were tested in infants during natural, imitative, and yoked conditions with their mothers at 5 and 13 weeks of age. Results showed that at both ages, infants of highly attuned mothers gazed, smiled, and vocalized positively more during the natural than during the imitative and yoked conditions, whereas they increased negative vocalizati…
Precursors to the development of intention at 6 months
Under investigation was whether 6-month-old infants expect people to behave differently toward persons and inanimate objects. Infants were randomly assigned to experimental and control conditions. In the experimental conditions, infants were habituated to an actor who either talked to or reached for and swiped with something hidden behind an occluder. In the test events the actor was occluded, but the infants were shown either a person or an obje…
Contingency Effects of People and Objects on Subsequent Cognitive Functioning in Three‐month‐old Infants
Three month‐old infants' responses to persons and objects who interacted with the infant at two levels of contingency were contrasted in two experiments. In experiment 1, contingent responding of people and objects was controlled. In experiment 2, the faciallvocal dynamics were controlled as well as contingent responding. In both experiments, contingent interaction had different effects on infants depending on whether the “actor” was a person or …
Changes in the quality of infant sounds as a function of social and nonsocial stimulation
The vocalizations of eight infants were recorded longitudinally in relation to different social and nonsocial contexts. The infants were observed bi-weekly from 3 to 25 weeks. At each visit they were presented with their mother, a female stranger and a doll, who were alternately active and passive. The results showed that by 7 weeks the infant vocalizations could be categorized from the social perception of adults into relatively long sounds cont…
Contingency Effects of People and Objects on Subsequent Cognitive Functioning in Three-month-old Infants
Contingency Effects of People and Objects on Subsequent Cognitive Functioning in Three‐month‐old Infants
Three month‐old infants' responses to persons and objects who interacted with the infant at two levels of contingency were contrasted in two experiments. In experiment 1, contingent responding of people and objects was controlled. In experiment 2, the faciallvocal dynamics were controlled as well as contingent responding. In both experiments, contingent interaction had different effects on infants depending on whether the “actor” was a person or …
Precursors to the development of intention at 6 months
Under investigation was whether 6-month-old infants expect people to behave differently toward persons and inanimate objects. Infants were randomly assigned to experimental and control conditions. In the experimental conditions, infants were habituated to an actor who either talked to or reached for and swiped with something hidden behind an occluder. In the test events the actor was occluded, but the infants were shown either a person or an obje…
Six-month-old infants rely on explanatory inference when relating communication to people and manipulatory actions to inanimate objects
Six-month-old infants expect people to talk to persons, but they expect people to manipulate objects (M. Legerstee, J. Barna, & C. DiAdamo, 2000). This interpretation of the behavior of 6-month-olds is consistent with both (a) the task requirements in M. Legerstee et al.'s (2000) study and (b) previous empirical and theoretical work that supports the conclusion that infants use explanatory inferences to make sense of the world during the first 6 …
Effects of maintaining and redirecting infant attention on the production of referential communication in infants with and without Down syndrome
The effects of maternal interactive styles on the production of referential communication were assessed in four groups of infants whose chronological ages ranged between 0;6 and 1;8. Two groups of infants with Down syndrome (DS), one ( n = 11) with a mean mental age (MA) of 0;8.6, and the other ( n = 11) of 1;4.5, were matched on MA with two groups ( n = 10 each) of typically developing infants. Infants were seen bi-monthly, for 8 months, with mo…
The role of modelling and request type on symbolic comprehension of objects and gestures in young children
In a first study, we considered whether modelling and the type of an adult's request influenced children's ability at 1;8 and 2;2 to comprehend gestures and replica objects as symbols for familiar objects. In a second study, we evaluated whether modelling and type of request influenced children's ability at 1;8 ( N =24) to understand unfamiliar (i.e. unconventional) objects as symbols. Results of Study 1 indicated that children at 2;2 comprehende…
Contingency, imitation, and affect sharing
Predictions about the role of contingency, imitation, and affect sharing in the development of social awareness were tested in infants during natural, imitative, and yoked conditions with their mothers at 5 and 13 weeks of age. Results showed that at both ages, infants of highly attuned mothers gazed, smiled, and vocalized positively more during the natural than during the imitative and yoked conditions, whereas they increased negative vocalizati…
Coordinated attention, declarative and imperative pointing in infants with and without Down syndrome
The link between coordinated attention, imperative and declarative pointing was assessed in a longitudinal study. Four groups of infants were studied in interaction with their mothers, a same-aged peer and the peer's mother. Two groups of infants had Down syndrome (DS), one ( n = 11) with a mean mental age (MA) of 0;8.6 and the other ( n = 11) with an MA of 1;4.5. These infants were matched on MA with two groups ( n = 10 each) of typically develo…
Six‐ and 9‐Month‐Old Infants Discriminate Between Goals Despite Similar Action Patterns
Behne, Carpenter, Call, and Tomasello (2005) showed that 9‐ to 18‐month‐olds, but not 6‐month‐olds, differentiated between people who were unwilling and unable to share toys. As the outcome of the two tasks is the same (i.e., the toy is not shared), the infants must respond to the different goals of the actor. However, visual habituation paradigms have shown an earlier onset of goal awareness. The present study reconciles this disparity by replic…
Goal-Oriented Behaviour Among Human and Non-Human Primates
Child and Animal Learning Development (11 works) · Psychology (11 works) · Developmental psychology (10 works) · Cognitive psychology (7 works) · Cognition (4 works) · Communication (4 works) · Social Psychology (4 works) · Action Observation and Synchronization (3 works) · Contingency (3 works) · Infant Health and Development (3 works)