The Still‐Face Effect: Methodological Issues and New Applications

Over the last 25 years, the seemingly simple still‐face phenomenon has elicited a tremendous amount of empirical and theoretical work. Adamson and Frick (2003/this issue) provide a comprehensive review and in‐depth analysis of this large body of research. In our commentary, we focus on 3 major points. First, we described several methods to define operationally the still‐face effect. Second, we noted the important role of adult touch in the still‐face procedure, and that the effect can be reproduced without adult touch, by live, televised and “virtual” adult faces–‐making it a true “still‐face” effect. Third, we emphasized a major methodological strength of the still‐face procedure: the use of multiple response measures. By measuring both infant visual attention and affect responses, adaptations of the still‐face procedure provide infant researchers with a powerful general method for studying the development of infant social competence.     

Researching Within‐Household Distribution: Overview,Developments, Debates,and Methodological Challenges

Research into intrahousehold finances challenges key assumptions about the family as a unitary whole, investigates the extent of sharing within it, examines mechanisms of control and allocation of resources, and reveals the personalized nature of different monies. This article presents an overview of research on within‐household distribution (understood as both outcome and process). It discusses major questions addressed, including inequalities between (gendered) individuals and the potential reasons for these. It outlines significant developments and debates, within qualitative research in particular, in relation to the unit of analysis (traditionally, the married couple), the texture and meaning of financial dealings within couples, and the tensions between autonomy and equal sharing as values. It then discusses several key methodological challenges, and concludes by highlighting some policy implications of central research messages. Throughout, it draws on and discusses the other articles in this special section, which explore key methodological issues in researching within‐household distribution.     

Advances in Relating Eye Movements and Cognition

Measurement of eye movements is a powerful tool for investigating perceptual and cognitive function in both infants and adults. Straightforwardly, eye movements provide a multifaceted measure of performance. For example, the location of fixations, their duration, time of occurrence, and accuracy all are potentially revealing and often allow stronger inferences than measures such as percentage correct or reaction time. Another advantage is that eye movements are an implicit measure of performance and do not necessarily involve conscious processes. Indeed, they are often a more revealing measure than conscious report (Hayhoe, Bensinger, & Ballard, 1998). Although the mere presence of gaze at a particular location in the visual field does not reveal the variety of brain computations that might be operating at that moment, the experimental context within which the fixation occurs often provides critical information that allows powerful inferences. The articles in this thematic collection are excellent examples of this.     

An Eye Tracking Investigation of Color–Location Binding in Infants' Visual Short‐Term Memory

Two experiments examined 8‐ and 10‐month‐old infants' (N = 71) binding of object identity (color) and location information in visual short‐term memory (VSTM) using a one‐shot change detection task. Building on previous work using the simultaneous streams change detection task, we confirmed that 8‐ and 10‐month‐old infants are sensitive to changes in binding between identity and location in VSTM. Further, we demonstrated that infants recognize specifically what changed in these events. Thus, infants' VSTM for binding is robust and can be observed in different procedures and with different stimuli.     

Toddlers' Empathy‐Related Responding to Distress: Predictions From Negative Emotionality and Maternal Behavior in Infancy

This study focused on the predictive contributions of infants' temperamental negative emotionality (proneness to fear, anger), sex, maternal responsivity, and their interaction on toddlers' empathy‐related responding to distress in 3 contexts. Ninety‐eight infants and their mothers participated in a longitudinal study. When the infants were 10 months of age, mothers completed assessments of infant temperamental anger and fear, and maternal behaviors were observed in a free‐play setting. At 18 months of age, toddlers' empathy‐related responding to the distress of a stranger, a crying baby doll, and the mother was assessed. A series of hierarchical and logistic regressions were performed, and results indicated that infant fear predicted higher concerned awareness toward adults and higher personal distress reactions toward the mother. In addition, maternal responsivity predicted higher concerned attention and lower personal distress reactions toward the baby doll and mother. Findings also revealed several interaction effects to predict toddlers' empathy‐related responding to distress.     

Video Deficit in Toddlers’ Object Retrieval: What Eye Movements Reveal About Online Cognition

The purpose of this study was to determine whether toddlers exhibit different eye‐movement patterns when watching real events versus video demonstrations in an object‐retrieval task. Twenty‐four‐month‐olds (N = 36) searched for a sticker on a felt board after watching an experimenter hide it behind a felt object in person or via video. Eye movements during the hiding event were recorded. Compared to those watching in‐person events, children watching video spent more time looking at the target location overall, yet they had relatively poor search performance. Visual attention to the target location predicted search performance in the video condition only; children who watched in‐person hiding events had high success rates even if they paid relatively little visual attention to the correct location. Findings are consistent with the hypothesis that toddlers process information more quickly for in‐person (versus video) events, enabling them to learn as well (or better) despite relatively low selective attention. Thus, relatively poor encoding, as well as memory retrieval, may underlie the video deficit.     

Trajectories of Regulatory Behaviors in Early Infancy: Determinants of Infant Self‐Distraction and Self‐Comforting

The ability to effectively regulate emotions is an important marker for early socio‐emotional development. The uses of self‐comforting behaviors and self‐distraction have been empirically supported as effective regulatory strategies for infants, although research on determinants of such behaviors is scarce. Thus, a more thorough examination of the development of regulatory behaviors is needed. For the current study, 135 mothers, fathers, and their infants participated in laboratory visits at 3, 5, and 7 months of age where parent sensitivity and infant regulatory strategies were coded from the Still‐Face Paradigm. Parents also filled out questionnaires about infant temperament and parental involvement. Using multilevel modeling to examine levels and trajectories of self‐comforting and self‐distraction, the current study found: (1) infants higher in temperamental surgency used more self‐distraction and self‐comforting, (2) infants lower in surgency with highly involved parents increased in self‐distraction at a faster rate, particularly with highly involved fathers, and (3) infants used self‐comforting more than average with fathers when the infant was also lower in temperamental regulation. In addition, we examined trajectories of parent involvement and temperament in relation to infant regulatory strategy.     

Child‐focused Parenting after Separation: Socio‐legal Developments and Challenges

In this article I utilise developing ideas in family law as a backdrop against which to discuss changing assumptions about parenting. In particular, I examine the gender‐neutral assumptions within family law in Australia and elsewhere in the light of seemingly contradictory evidence about the value of post‐separation fathering. That men were equally capable of providing effective parenting was by no means clear at the time that the principle of gender‐neutrality became common in family law—the 1960s and 70s. Only recently, has burgeoning research on fathering begun to more clearly affirm its value and to clarify the conditions under which pre and post separation fathering makes a positive difference. Paradoxically, it is at this very time that legally based challenges to the gender‐neutral, shared‐parenting philosophy of the 1995 Australian Family Law Reform Act have begun to emerge. The often‐perplexed interface between law, social science research and therapeutic intervention presents many challenges. I conclude the article by flagging a number of questions relevant to family therapists in this difficult field of work.     

Consequences of Eye Color,Positioning, and Head Movement for Eye‐Tracking Data Quality in Infant Research

Eye tracking has become a valuable tool for investigating infant looking behavior over the last decades. However, where eye‐tracking methodology and achieving high data quality have received a much attention for adult participants, it is unclear how these results generalize to infant research. This is particularly important as infants behave different from adults in front of the eye tracker. In this study, we investigated whether eye physiology, positioning, and infant behavior affect measures of eye‐tracking data quality: accuracy, precision, and data loss. We report that accuracy and precision are lower, and more data loss occurs for infants with bluish eye color compared to infants with brownish eye color. Moreover, accuracy was lower for infants positioned in a high chair or in the parents' lap compared to infants positioned in a baby seat. Finally, precision decreased and data loss increased as a function of time. We highlight the importance of data quality when comparing multiple groups, as differences in data quality can affect eye‐tracking measures. In addition, we investigate how two different measures to quantify infant movement influence eye‐tracker data quality. These findings might help researchers with data collection and help manufacturers develop better eye‐tracking systems for infants.     

The Other‐Race Effect in Infancy: Evidence Using a Morphing Technique

Human adults are more accurate at discriminating faces from their own race than faces from another race. This other‐race effect (ORE) has been characterized as a reflection of face processing specialization arising from differential experience with own‐race faces. We examined whether 3.5‐month‐old infants exhibit ORE using morphed faces on which adults had displayed a crossover ORE (i.e., Caucasians performed better on Caucasian faces and Asians performed better on Asian faces). In this experiment, Caucasian infants who had grown up in a predominantly Caucasian environment discriminated 100% Caucasian faces from 70% Caucasian/30% Asian morphed faces but failed to discriminate between the corresponding 100% Asian and 70% Asian/30% Caucasian faces. Thus, 3.5‐month‐olds exhibited evidence of ORE. These results indicate that at least by 3.5 months of age, infants have attained enough face processing expertise to process familiar‐race faces in a different manner than unfamiliar‐race faces.     

Follow My Gaze: Face Race and Sex Influence Gaze‐Cued Attention in Infancy

Using the eye gaze of others to direct one's own attention develops during the first year of life and is thought to be an important skill for learning and social communication. However, it is currently unclear whether infants differentially attend to and encode objects cued by the eye gaze of individuals within familiar groups (e.g., own race, more familiar sex) relative to unfamiliar groups (e.g., other race, less familiar sex). During gaze cueing, but prior to the presentation of objects, 10‐month‐olds looked longer to the eyes of own‐race faces relative to 5‐month‐olds and relative to the eyes of other‐race faces. After gaze cueing, two objects were presented alongside the face and at both ages, infants looked longer to the uncued objects for faces from the more familiar‐sex and longer to cued objects for the less familiar‐sex faces. Finally, during the test phase, both 5‐ and 10‐month‐old infants looked longer to uncued objects relative to cued objects but only when the objects were cued by an own‐race and familiar‐sex individual. Results demonstrate that infants use face eye gaze differently when the cue comes from someone within a highly experienced group.     

Video-Based Eye Tracking in Sex Research: A Systematic Literature Review

Although eye tracking has been used for decades, it has gained popularity in the area of sex research only recently. The aim of this article is to examine the potential merits of eye tracking for this field. We present a systematic review of the current use of video-based eye-tracking technology in this area, evaluate the findings, and identify future research opportunities. A total of 34 relevant studies published between 2006 and 2014 were identified for inclusion by means of online databases and other methods. We grouped them into three main areas of research: body perception and attractiveness, forensic research, and sexual orientation. Despite the methodological and theoretical differences across the studies, eye tracking has been shown to be a promising tool for sex research. The article suggests there is much potential for further studies to employ this technique because it is noninvasive and yet still allows for the assessment of both conscious and unconscious perceptional processes. Furthermore, eye tracking can be implemented in investigations of various theoretical backgrounds, ranging from biology to the social sciences.     

Synchrony,Co‐Eating and Communication During Complementary Feeding in Early Infancy

The transition from milk to complementary food is a crucial but difficult process, requiring considerable adult sensitivity. We know little about the relationship between maternal feeding behaviors and infant willingness to eat at the onset of complementary feeding (CF), and we know even less about how these patterns might vary across cultures. Thirty‐seven dyads (15 from the UK and 22 from Italy) took part in a longitudinal study, during which mealtimes were video‐recorded 1 week after the onset of CF (Time 1) and at 7 months of infant age (Time 2). The first five minutes of mealtimes were coded for maternal feeding behaviors, for infant willingness to eat, and for synchrony in feeding. Maternal vocal communications (MVCs) and attention‐directing acts (ADAs) during the whole mealtime were also coded. Infant willingness to eat was significantly related to synchrony and co‐eating, suggesting the importance of sensitivity and empathy during feeding as in other parent–infant interactions. The frequency of maternal ADAs varied between nationalities and, contrary to current advice, did not relate negatively to infant willingness to eat. These patterns and variations suggest the need to consider CF as a contextually variable and sensitive foundation for feeding relationships.     

Mechanisms of Visual Object Recognition in Infancy: Five‐Month‐Olds Generalize Beyond the Interpolation of Familiar Views

This work examined predictions of the interpolation of familiar views (IFV) account of object recognition performance in 5‐month‐olds. Infants were familiarized to an object either from a single viewpoint or from multiple viewpoints varying in rotation around a single axis. Object recognition was then tested in both conditions with the same object rotated around a novel axis. Infants in the multiple‐views condition recognized the object, whereas infants in the single‐view condition provided no evidence for recognition. Under the same 2 familiarization conditions, infants in a 2nd experiment treated as novel an object that differed in only 1 component from the familiar object. Infants' object recognition is enhanced by experience with multiple views, even when that experience is around an orthogonal axis of rotation, and infants are sensitive to even subtle shape differences between components of similar objects. In general, infants' performance does not accord with the predictions of the IFV model of object recognition. These findings motivate the extension of future research and theory beyond the limits of strictly interpolative mechanisms.     

The Development of Specialized Processing of Own‐Race Faces in Infancy

In this study, we examined developmental changes in infants' processing of own‐ versus other‐race faces. Caucasian American 8‐month‐olds (Experiment 1) and 4‐month‐olds (Experiment 2) were tested in a habituation‐switch procedure designed to assess holistic (attending to the relationship between internal and external features of the face) versus featural (attending to individual features of the face) processing of faces. Eight‐month‐olds demonstrated holistic processing of upright own‐race (Caucasian) faces, but featural processing of upright other‐race (African) faces. Inverted faces were processed featurally, regardless of ethnicity. Four‐month‐olds, however, demonstrated holistic processing of both Caucasian and African upright faces. These results demonstrate that infants' processing of own‐ versus other‐race faces becomes specialized between 4 and 8 months.     

Fine‐Grained Analysis of Motionese: Eye Gaze,Object Exchanges,and Action Units in Infant‐Versus Adult‐Directed Action

Mothers modify their actions when demonstrating objects to infants versus adults. Such modifications have been called infant‐directed action (IDA) or motionese (Brand, Baldwin, & Ashburn, 2002). We investigated the IDA features of interactiveness and simplification by quantifying eye gaze, object exchanges, and action units enacted between exchanges in 42 mothers' demonstrations of novel objects to infants (6–8 months or 11–13 months) or adults. We found more eye gaze, more object exchanges, and fewer action types per turn in demonstrations to infants relative to adults. Unlike prior research using global measurements, we detected differences in behavior directed at infants of different ages: Shorter, more frequent gazes and more exchanges characterized demonstrations to older versus younger infants. These findings indicate the fruitfulness of fine‐grained analysis of IDA, and further clarify how adults may support infants' processing of human motion.