Birgit Träuble

The role of functional information for infant categorization

This report examines whether knowledge about function influences the formation of artifact categories in 11-12- month old infants. Using an object-examination task, a set of artificial stimuli was presented that could either be grouped according to overall similarity or according to similarity in one functionally relevant part. Experiment 1 revealed that infants categorized the objects according to overall similarity but not part similarity under control conditions. Experiment 2 showed that after having seen the experimenter demonstrating the functional use of the critical part, infants later categorized the stimuli according to part similarity. When the same actions were performed without producing any effect, infants failed to categorize according to the critical part. This set of findings suggests that 11-12-month old infants use functional information as a cue to categorization.

Synchrony in the onset of mental state understanding across cultures? A study among children in Samoa

The development of false belief understanding in Samoa was investigated in two studies testing more than 300 children. Children’s understanding was assessed with a change of location task. The results of study 1 suggest that Samoan children improve gradually and slowly, with no succeeding majority before 8 years of age. One third of the 10–13-year-olds still failed. Study 2 used a different translation among 55 children from 4–8 years of age and supports the former results. These findings speak for the cultural variability of theory of mind development and provide the first cross-cultural continuous survey on false belief understanding of children older than 5 years of age with a large sample in a place where mental states are no suitable object for conjecture.

Speed and direction changes induce the perception of animacy in 7-month-old infants.

A large body of research has documented infants’ ability to classify animate and inanimate objects based on static or dynamic information. It has been shown that infants less than 1 year of age transfer animacy-specific expectations from dynamic point-light displays to static images. The present study examined whether basic motion cues that typically trigger judgments of perceptual animacy in older children and adults lead 7-month-olds to infer an ambiguous object’s identity from dynamic information. Infants were tested with a novel paradigm that required inferring the animacy status of an ambiguous moving shape. An ambiguous shape emerged from behind a screen and its identity could only be inferred from its motion. Its motion pattern varied distinctively between scenes: it either changed speed and direction in an animate way, or it moved along a straight path at a constant speed (i.e., in an inanimate way). At test, the identity of the shape was revealed and it was either consistent or inconsistent with its motion pattern. Infants looked longer on trials with the inconsistent outcome. We conclude that 7-month-olds’ representations of animates and inanimates include category-specific associations between static and dynamic attributes. Moreover, these associations seem to hold for simple dynamic cues that are considered minimal conditions for animacy perception.

The Weird World of Cross-Cultural False-Belief Research: A True- and False-Belief Study Among Samoan Children Based on Commands

Previous cross-cultural research using false-belief tasks has explored whether childrens theory of mind develops synchronously across cultures. Success on false-belief tasks is usually interpreted as an important indicator of childrens mental state understanding, but inconsistent findings have led to questions regarding the interpretation of childrens success and failure. Based on the assumptions of perceptual access reasoning (Hedger & Fabricius, 2011) and reflecting on inconsistencies in cross-cultural false-belief research, we argue for the advantages of the additional use of true-belief tasks, which can help to differentiate between different levels of childrens reasoning. Consequently, a false-belief task and a true-belief task were derived from typical Samoan adult–child interactions. The performance of 40 Samoan children aged 5 to 7 years old was compared to the performance of 40 age-matched German children. While German children passed both tasks, Samoan children failed the false-belief task and did not reply above chance level in the true-belief task. According to our knowledge, this is the first study using both a false-belief task and true-belief task in a cross-cultural setting. Our results reveal additional patterns of reasoning that are neither in line with perceptual access reasoning nor with a representational understanding of false beliefs. The study is discussed in terms of a more general problem of experimental research in non-Western settings.

Effects of Maternal Anxiety Disorders on Infant Self-Comforting Behaviors: The Role of Maternal Bonding, Infant Gender and Age

Background/Aims: We investigated the links between maternal bonding, maternal anxiety disorders, and infant self-comforting behaviors. Furthermore, we looked at the moderating roles of infant gender and age. Methods: Our sample (n = 69) comprised 28 mothers with an anxiety disorder (according to DSM-IV criteria) and 41 controls, each with their 2.5- to 8-month-old infant (41 females and 28 males). Infant behaviors were recorded during the Face-to-Face Still-Face paradigm. Maternal bonding was assessed by the Postpartum Bonding Questionnaire. Results: Conditional process analyses revealed that lower maternal bonding partially mediated between maternal anxiety disorders and increased self-comforting behaviors but only in older female infants (over 5.5 months of age). However, considering maternal anxiety disorders without the influence of bonding, older female infants (over 5.5 months of age) showed decreased rates of self-comforting behaviors, while younger male infants (under 3 months of age) showed increased rates in the case of maternal anxiety disorder. Conclusions: The results suggest that older female infants (over 5.5 months of age) are more sensitive to lower maternal bonding in the context of maternal anxiety disorders. Furthermore, results suggest a different use of self-directed regulation strategies for male and female infants of mothers with anxiety disorders and low bonding, depending on infant age. The results are discussed in the light of gender-specific developmental trajectories.

Maternal Emotional Availability and Its Association with Maternal Psychopathology, Attachment Style Insecurity and Theory of Mind

Background/Aims: High maternal emotional availability (EA) positively affects various domains of child development. However, the question of which factors promote or hinder maternal EA has not been investigated systematically. The present study investigated several maternal characteristics, namely maternal psychopathology, maternal attachment style insecurity, and theory of mind (ToM) as possible factors that influence maternal EA. Methods: The sample was comprised of 56 mothers and their preschool-aged children. Half of the mothers were diagnosed with postpartum depression and or anxiety disorders according to DSM-IV, and the other half were healthy controls. Results: The results showed that both low maternal attachment style insecurity and high ToM skills significantly predicted maternal EA sensitivity, independently from maternal postpartum and concurrent psychopathology and education. Moreover, maternal attachment style insecurity fully mediated the link between maternal postpartum psychopathology and sensitivity. Conclusion: The findings suggest that maternal attachment style security can buffer negative effects of maternal psychopathology on maternal sensitivity in the mother-child interaction.

The impact of postpartum depression and anxiety disorders on children's processing of facial emotional expressions at pre-school age.

To enhance understanding of impaired socio-emotional development in children of postpartum depressed or anxious mothers, this longitudinal study addressed the question of whether maternal postpartum depression and anxiety disorders result in deficits in children’s processing of facial emotional expressions (FEEs) at pre-school age. Thirty-two mothers who had fulfilled Diagnostic and Statistical Manual of Mental Disorders IV (DSM-IV) criteria for postpartum depression and/or anxiety disorder and their pre-school aged children were tested for FEE processing abilities and compared to a healthy control group (n = 29). Child assessments included separate tasks for emotion recognition and emotion labelling. Mothers completed an emotion recognition test as well as the Structured Clinical Interview for DSM-IV Axis I Disorders I (SCID-I). Children of postpartum depressed and/or anxious mothers performed significantly worse than control children at labelling, but not at recognizing facial expressions of basic emotions. Emotion labelling at pre-school age was predicted by child age and maternal postpartum mental health, but neither current maternal mental health nor current maternal emotion recognition was associated with child FEE processing. Results point to a specific importance of early social experiences for the development of FEE labelling skills. However, further studies involving sensitive measures of emotion recognition are needed to determine if there might also exist subtle effects on FEE recognition.

Vicarious social exclusion and memory in young children.

We investigated whether witnessing social exclusion influenced memory recall in preschool children. A sample of 81 children (Mage = 5 years, 4 months) first watched priming videos either depicting social exclusion or not. Subsequently, they participated in two memory tasks, one testing recall of numbers and the other testing recall of previously heard story events. These consisted of social (e.g., “brother”) and nonsocial (e.g., “circus”) items. In addition, a language-screening test was conducted to ensure that in both conditions (i.e., social exclusion and control), children’s language levels were similar. In both conditions, children scored comparably on number recall and overall recall of story events. However, only children who observed social exclusion remembered more social than nonsocial items. The findings suggest that vicarious social exclusion triggers selective retention of social information in preschool age, in accord with findings of older children and adults who directly experienced social exclusion. Social exclusion affects the need to belong in young children, not only indicated by means of increased attempts to affiliate, but also by an increased memory for social events.

“Next to you”—Young children sit closer to a person following vicarious ostracism

Seeking proximity to another person immediately expresses affiliative intentions. These are highly relevant after experiencing social exclusion. Through a novel task, the current study investigated the relation between proximity and observed ostracism during early childhood. A sample of 64 children (Mage=58months) first watched priming videos either depicting ostracism or not. Subsequently, children saw four seats of varying distances from an interactants seat and chose where to sit. Children who observed social exclusion selected seats with higher proximity. The results suggest that young preschoolers can immediately express the threatened need to belong by literally getting closer to even a stranger after witnessing ostracism. The task provides new opportunities to test reactions to social exclusion during early childhood.

Pursuit tracks chase: exploring the role of eye movements in the detection of chasing

We explore the role of eye movements in a chase detection task. Unlike the previous studies, which focused on overall performance as indicated by response speed and chase detection accuracy, we decompose the search process into gaze events such as smooth eye movements and use a data-driven approach to separately describe these gaze events. We measured eye movements of four human subjects engaged in a chase detection task displayed on a computer screen. The subjects were asked to detect two chasing rings among twelve other randomly moving rings. Using principal component analysis and support vector machines, we looked at the template and classification images that describe various stages of the detection process. We showed that the subjects mostly search for pairs of rings that move one after another in the same direction with a distance of 3.5–3.8 degrees. To find such pairs, the subjects first looked for regions with a high ring density and then pursued the rings in this region. Most of these groups consisted of two rings. Three subjects preferred to pursue the pair as a single object, while the remaining subject pursued the group by alternating the gaze between the two individual rings. In the discussion, we argue that subjects do not compare the movement of the pursued pair to a singular preformed template that describes a chasing motion. Rather, subjects bring certain hypotheses about what motion may qualify as chase and then, through feedback, they learn to look for a motion pattern that maximizes their performance.