A recent focus of our Program for the Study of Infancy is the extent to which lab assistants retain fidelity when implementing experimental protocols. Dixon et al. showed that experimenters’ implementations of some aspects of standardized protocols can be influenced by infants’ temperaments. Ellefson and Oppenheimer further found that procedural deviations reduce effect sizes and lead to heterogeneity of findings. In this project, we evaluated archival videos involving experimenters’ implementations of two elicited imitation tasks, “Feed Bear” and “Make a Rattle.” In both tasks, experimenters were assumed to adhere to a narrative script and procedure, which included familiarizing infants with experimental stimuli for 60 seconds prior to infants engaging the tasks. Experimenters were also expected to adhere to a standardized narrative script that accompanied the modeling of “feeding the bear” or “making a rattle.” In this study we explored whether they did so, independent of infants' temperament characteristics. Ten experimenters guided sixty-one 15-month-olds through the experimental procedure. We examined two types of dependent measures reflecting 1) whether experimenters adhered to the 60 second familiarization time protocol, and 2) whether experimenters adhered to the standardized scripts. We also tracked experimenter infant-directed speech (IDS) before the model (prologue IDS) and after the model (epilogue IDS), to see if experimenters’ speech was potentially influenced by infant temperament. Infant temperament was measured by parent-report using the Early Childhood Behavior Questionnaire (ECBQ). For familiarization times in the Feed Bear task, experimenters granted significantly longer times to the infants than they were supposed to [M = 68.72, SD = 17.14; t(28) = 2.74, p = .011]. But there were no differences among the experimenters in familiarization time. For Make a Rattle, experimenters were on-target with their familiarization times (M = 67.64, SD = 21.38). Infant temperament was not associated with familiarization times in either task. In terms of IDS, experimenters used more words in the standardized narratives of both tasks than they were supposed to [M = 123.90, SD = 18.03; t(28) = 7.73, p M = 109.00, SD = 9.52; t(27) = 15.01, p < .001] respectively. There was no association between IDS during the narrative phase and infant temperament. However, there were associations between infant temperament and IDS during the prologue and epilogue phases; namely for effortful control (prologue r = .29, p p < .05), impulsivity (prologue r = .23, p p

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Parenting behaviors have long been recognized as crucial to children’s healthy development. However, examinations of the etiology of these behaviors are less prevalent. The current study investigated the driving forces behind parental warmth and discipline, particularly whether they’re related more to traits within the parent or reactions to characteristics of the child. To explore this question, three robust factors of child temperament – effortful control, negative affectivity, and surgency/extraversion – and parent personality traits were examined in association with parent behaviors through differential parenting within twin pairs. Correlations between differences in temperament within twin pairs and differences in parenting within twin pairs showed that children with higher effortful control received more discipline from parents than their co-twin. Associations between parent behaviors and parent personality found that extraversion and agreeableness in parents were significantly related to parent warmth. Finally, by examining the heritability of temperament and comparing parenting toward monozygotic vs. dizygotic twins, this study clarified the direction of effects and genetic contributions to differential parenting behaviors, supporting previous literature that discipline acts in reaction to the child, whereas warmth is more driven by parent personality. This research begins to elucidate the causes behind parenting behaviors, allowing clinicians and parents to more effectively address the parent-child relationship to correct maladaptive parenting behaviors and encourage healthy and adaptive parenting behaviors, thus promoting positive outcomes for children.

Oppositional defiant disorder (ODD) typically has been studied as a single dimensional construct but findings suggest that it may be better conceptualized as a disorder of multiple dimensions that reflect qualitative differences amongst symptoms. Although two- and three-factor models have been identified, emerging studies suggest that a two-dimensional model distinguishing emotional and behavioral symptom dimensions may best characterize the disorder. Emotional and behavioral symptom dimensions have demonstrated unique associations with internalizing and externalizing symptoms and disorders, respectively, but correlates in other domains known to confer risk for ODD (e.g., child and contextual factors) have yet to be explored. Temperament and parenting are among many such factors robustly linked to ODD, but their associations with emotional and behavioral symptom dimensions specifically remain unclear. To address these gaps in the literature, the present study explored temperament (e.g., mood quality, approach) and parenting behaviors (e.g., acceptance, psychological control, and inconsistent discipline) as correlates of emotional and behavioral dimensions and considered whether parenting behaviors moderate the relation between temperament and ODD symptom dimensions. Participants included 775 youth (72% male, 76% Caucasian) and their biological parents. Temperament and parenting behaviors were assessed when youth were 10-12 years old (Time 1), and ODD symptoms were assessed when youth were 14-16 years old (Time 2). Regression analyses examined the main effects of temperament and parenting, as well as whether parenting behaviors moderate the relation between temperament and emotional and behavioral ODD symptom dimensions. Results indicated a significant main effect of parental acceptance in the prediction of both the emotional and behavioral symptom dimensions. Furthermore, parental psychological control factors emerged as moderators of the relation between temperamental approach and ODD behavioral symptoms; specifically, youth higher in approach exhibited fewer behavioral symptoms in the context of lower parental psychological control. The identification of risk processes associated with ODD symptom dimensions may help to elucidate etiological models and inform interventions that can target those factors most strongly related to each dimension. / Psychology

Fear is an integral and adaptive aspect of emotion related development (Gullone, 1999) and is one of the earliest regulatory systems influencing the control of behaviors (Rueda, Posner & Rothbart, 2004). This study examined the potential role of child fearfulness on the relation between attention, effortful control and visual recognition memory. Behavioral and physiological measurements of fear as well as measures of attention and recognition memory were examined. Behavioral tendencies of fearfulness rather than discrete behavioral acts were associated with right frontal asymmetry. VRM performance was also associated with more right frontal functioning. Fearfulness regulated the relation between attention and VRM as well as moderated the relation between effortful control and VRM. This study provided some evidence for the influencing role of normal variations of fear (i.e., non-clinical levels of fear) on the cognitive processes of developing children. / Ph. D.

Since the COVID-19 pandemic, many researchers turned to remote testing to continue to collect data. This shift provided new insights and exciting opportunities for researchers, including the ability to gain access to larger demographic pools. However, remote work has come with unique challenges. One factor that has proved to be challenging is the level of control researchers have when conducting remote studies. For example, compared to in-lab room setup and design, participants' home environments have numerous distractions for young toddlers (e.g., family members, pets, tv, toys). Thus, the increased variability has led to important questions regarding methodology, implementation, and in the current study, variability in participation. That is, are there systematic biases in final samples due to differences in participant characteristics, such as temperament? Particularly for remote work, the increased variability has created challenges for researchers to collect data but also exciting opportunities to understand how temperament may interact with participation and study completion rates. The current study aimed to understand whether temperament plays a role in study completion rates in remote research for toddlers ages 18 and 24 months. It was expected that effortful control would significantly influence participation and study completion, and that both negative affectivity and surgency would negatively influence participation in the remote study. Both effortful control and negative affectivity were not significantly related to participation, while surgency positively related to participation. / Doctor of Philosophy / Since the pandemic, many developmental researchers shifted from in-person settings to online testing. Although remote testing is not new, this shift provided many research labs with new opportunities to reach more participants. However, with this shift to remote testing, researchers relinquished control that has been designed in the lab, in that each home environment is different. For example, noise, internet speed, and computer size will vary across participants, whereas in the laboratory, these factors remained constant. Moreover, toys, tvs, pets, and/or siblings may be distracting for toddlers participating in a remote study. Thus, these differences across home environments have illuminated differences in toddlers' successful participation. For example, are some toddlers more likely to maintain their attention to the current task? Temperament was investigated in the current study to determine if certain skills may influence study participation and completion rates for toddlers ages 18 to 24-months. It was expected that effortful control (e.g., inhibitory control, attention focusing) would significantly influence the likelihood of a toddler completing the remote task. On the other hand, it was expected that both surgency (e.g., impulsivity, activity level) and negative affectivity (e.g., fear, shyness) would negatively influence task participation. Only surgency positively influenced task participation, and will be discussed in the context of toddler motivation, and engagement in the task.

My thesis project aimed to assess potential meaningful differences in the behavioral subtypes of externalizing behaviors in children. Externalizing behaviors are a style of behavioral adjustment that are characteristic of early childhood behavior problems. They are commonly measured in developmental and clinical research using the Externalizing Scale of the Child Behavior Checklist (CBCL). The scale is comprised of Aggressive and Rule-Breaking Behaviors, which are divergent in their developmental trajectory and personological distinctions: aggressive behaviors have emotional underpinnings like frustration, whereas rule-breaking is linked to behavioral impulsivity. In situations of low regulation, negative affectivity may differentially predispose children to these behaviors due to a reactive propensity for anger and frustration. Attentional control can act to regulate these behaviors through shifting and focusing of attention, but may execute this regulation differently based on the situational context. The role of contextual attentional control in predicting two distinct externalizing behaviors has not been sufficiently evaluated in children. AC was behaviorally coded for during a frustrating context. Child behavior problems and temperament were assessed via parent report. Two mediation models were assessed with NA, AC, and aggressive and rule-breaking behaviors, but no indirect effects were found. When individual components of AC were assessed separately as moderations as opposed to mediations, attention shifting played a prominent role and moderated both the aggressive and rule-breaking models. Findings further clarify the role of attention in the relation between temperament and childhood behavior problems. / M.S. / Behavior problems in early childhood consist of aggressive and rule-breaking behaviors, which are distinct behaviors with meaningful differences in how they develop. Aggressive behaviors are marked by physical tendencies such as hitting and fighting, whereas rule-breaking behaviors tend to be non-aggressive, consisting of more impulsive behaviors like stealing, cheating, and lying. Negative affectivity in toddlerhood is a predictor of both behaviors, reflecting a heightened predisposition towards negative emotions like anger and frustration. Attentional control is a form of self-regulation, consisting of shifting and focusing attention, that may be responsible for regulating the impact of negative affectivity on each externalizing behavior. Additionally, attentional control in childhood may regulate each behavior differently based on context. The goal of the current study was to understand how negative affectivity predicts each behavior differently through attentional control, specifically based on the context it is measured in. Aggressive behaviors, rule-breaking behaviors, and negative affectivity were measured using parent-report questionnaire, and attentional control was behaviorally coded for during a frustrating puzzle task. Two mediation models were assessed with negative affectivity, attentional control, and aggressive and rule-breaking behaviors, but there were no significant findings. When individual components of attentional control (shifting and focusing) were assessed separately as moderators, attention shifting moderated the relation between negative affectivity and both aggressive and rule-breaking behaviors. Findings further clarify the role of attention in the relation between temperament and childhood behavior problems.

Identifying whether a stimulus is threatening or not is critical for staying safe. The faster one can detect a threat, the greater chance there is to avoid any potential danger. Factors contributing to the visual attention of threat are therefore informative. Previous research has examined how aspects of temperament and effortful control interact and affect the attention allocated to threats, especially in clinically anxious populations. However, there is a sparsity of this literature existing for nonclinical populations. My study addressed previous gaps by examining whether negative affect and fear impact an attention bias to threat in children aged 6 through 8 while assessing how attentional control and inhibitory control moderate these relations. A modified visual search task with snakes as the threat was given to the participants after the children’s parents completed questionnaires and the children completed an attentional control task. Results showed that an attentional bias to snakes was seen in the sample. Negative affect as a main effect nor as an interaction effect with attentional control predicted for the attention bias to snakes. Fear predicted for the attention bias to snakes as a main effect. Interestingly, inhibitory control moderated the relation between fear and the attention bias to snakes. Only children with high inhibitory control and high fear predicted for the attention bias to snakes. Findings may indicate children with this temperament are more vulnerable to the onset of anxiety. / M.S. / Identifying whether a stimulus is threatening or not is critical for staying safe. The faster one can detect a threat, the greater chance there is to avoid any potential danger. Factors contributing to the visual attention of threat are therefore informative. Previous research has examined how aspects of temperament and effortful control interact and affect the attention allocated to threats, especially in clinically anxious populations. However, there is a sparsity of literature existing for nonclinical populations. My study addressed previous gaps by examining whether aspects of temperament, specifically negative affect and fear, impact an attention bias to threat in children aged 6 through 8 while assessing how aspects of effortful control, specifically attentional control and inhibitory control, moderate these relations. A visual search task where participants would select a target among distractors with snakes as the target representing threat was given to the child participants after the children’s parents completed questionnaires and the children completed an I-spy task which measured the children’s attentional control. Results showed that an attentional bias to snakes was seen in the sample. Negative affect did not solely nor when interacted with attentional control predict for the attention bias to snakes. Fear predicted for the attention bias to snakes as a main effect. Interestingly, inhibitory control moderated the relation between fear and the attention bias to snakes, which meant that only children with high inhibitory control and high fear predicted for the attention bias to snakes. Findings may indicate children with this temperament are greater susceptible the development of anxiety.