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Peer victimization (or bullying) is a known risk factor for depression, especially among youth. However, the mechanisms connecting victimization experience to depression symptoms remains unknown. As depression is known to be associated with neural blunting to monetary rewards, aberrant responsiveness to social rewards may be a key deficit connecting socially stressful experiences with later depression. We, therefore, sought to determine whether adolescents' experiences with social stress would be related to their current response to social rewards over less socially relevant monetary rewards. Neural responses to monetary and social rewards were measured using event-related potentials (ERPs) to peer acceptance and rejection feedback (Island Getaway task) and to monetary reward and loss feedback (Doors task) in a sample of 56 late adolescents/emerging young adults followed longitudinally since preschool. In the Island Getaway task, participants voted whether to \"keep\" or \"kick out\" each co-player, providing an index of prosocial behavior, and then received feedback about how each player voted for the participant. Analyses tested whether early and recent peer victimization was related to response to rewards (peer acceptance or monetary gains), residualized for response to losses (peer rejection or monetary losses) using the reward positivity (RewP) component. Findings indicated that both experiencing greater early and greater recent peer victimization were significantly associated with participants casting fewer votes to keep other adolescents (\"Keep\" votes) and that greater early peer victimization was associated with reduced neural response to peer acceptance. Early and recent peer victimization were significantly more associated with neural response to social than monetary rewards. Together, these findings suggest that socially injurious experiences such as peer victimization, especially those occurring early in childhood, relate to two distinct but important findings: that early victimization is associated with later reduced response to peer acceptance, and is associated with later tendency to reject peers. Findings also suggest that there is evidence of specificity to reward processing of different types; thus, future research should expand studies of reward processing beyond monetary rewards to account for the possibility that individual differences may be related to other, more relevant, reward types.

The Aesop's Fable Paradigm is a collection of essays that explore the cutting-edge intersection of Folklore and Science. From moralizing fables to fantastic folktales, humans have been telling stories about animals-animals who can talk, feel, think, and make moral judgments just as we do-for a very long time. In contrast, scientific studies of the mental lives of animals have professed to be investigating the nature of animal minds slowly, cautiously, objectively, with no room for fanciful tales, fables, or myths. But recently, these folkloric and scientific traditions have merged in an unexpected and shocking way: scientists have attempted to prove that at least some animal fables are actually true. These interdisciplinary chapters examine how science has targeted the well-known Aesop's fable \"The Crow and the Pitcher\" as their starting point. They explore the ever-growing set of experimental studies which purport to prove that crows possess an understanding of higher-order concepts like weight, mass, and even Archimedes' insight about the physics of water displacement. The Aesop's Fable Paradigm explores how these scientific studies are doomed to accomplish little more than to mirror anthropomorphic representations of animals in human folklore and reveal that the problem of folkloric projection extends far beyond the \"Aesop's Fable Paradigm\" into every nook and cranny of research on animal cognition.

[This corrects the article DOI: 10.3389/fnbeh.2019.00120.].

A randomized controlled trial (RCT) demonstrated that a novel psychotherapy, Parent–Child Interaction Therapy—Emotion Development (PCIT-ED), effectively treats preschool-onset depression. However, little is known about which children benefit most from PCIT-ED. As positive parent-level factors are associated with lesser depressive symptoms, this study explored the potential moderating role of positive parenting relationships on PCIT-ED efficacy. This study examined mothers and their children aged 3–6 (N = 185) who participated in the PCIT-ED RCT. Children were randomized to immediate PCIT-ED treatment (n = 94) or a waitlist control condition (n = 91) that received treatment after 18 weeks. Prior to treatment, children completed a narrative story completion task that was videotaped and coded for children’s positive and negative representations of their mothers. Parent–child interaction tasks were also completed pre-treatment and videotaped and coded to measure observed parenting. Odds of MDD diagnosis post-treatment were predicted by the interaction of children’s negative maternal representations and treatment group (Estimate = -.68; SE = .27; χ2 = 6.45; p = .01) and the interaction of children’s relatively more positive than negative maternal representations and treatment group (Estimate = .30; SE = .13; χ2 = 5.27; p = .02). Observed parenting measures did not significantly predict odds of MDD diagnosis. Thus, PCIT-ED predicted loss of MDD diagnosis for children who displayed maternal representations that were less negative, and relatively more positive than negative. Results suggest that children with relatively more positive maternal representations may be more likely to benefit from PCIT-ED, whereas children with more negative maternal representations may need targeted work to decrease negative maternal perceptions before initiating PCIT-ED in order for treatment to be most effective.

Preschool-onset major depressive disorder (PO-MDD) is an impairing pediatric mental health disorder that impacts children as young as three years old. There is limited work dedicated to uncovering neural measures of this early childhood disorder which could be leveraged to further understand both treatment responsiveness and future depression risk. Event-related potentials (ERPs) such as the P300 have been employed extensively in adult populations to examine depression-related deficits in cognitive and motivational systems. Few studies examine the prospective relationships between depression and P300, especially in young children. Moreover, limited research examines the relationship between P300 with psychotherapy treatment responsiveness in youths. The current study sought to examine the prospective relationships between pre-intervention P300 (i.e., choice-locked) elicited from the doors task in depressed preschool children (i.e., PO-MDD; ages 3-to-6) with reductions in depressive symptoms after completing an 18-week long dyadic psychotherapy intervention ( n  = 59). We also explored relations to risk for depression assessed at a follow-up visit during preadolescence (ages 8-to-12; n  = 82). Those with PO-MDD exhibiting reduced choice (doors)-locked P300 demonstrated worse treatment response to psychotherapy and were more likely to meet criteria for depression during preadolescence. Moreover, the relationship between pre-intervention P300 and later preadolescence depression was significantly mediated by response to treatment. These findings suggest that deficits in brain systems linked to the choice-locked P300 component (i.e., cognitive and motivational) might be indicative of non-responsiveness to early dyadic psychotherapeutic intervention efforts for depression which impacts risk for recurrent patterns of depression in youths.

Temper tantrums are sudden, overt negative emotional displays that are disproportionate to the eliciting event. Research supports that severe temper tantrums during the preschool period are associated with preschool psychopathology, but few studies have identified which characteristics of preschool tantrums are predictive of distal psychopathological outcomes in later childhood and adolescence. To examine this question, we used a prospective, longitudinal dataset enriched for early psychopathology. Participants ( N = 299) included 3-to 6-year-old children (47.8% female) assessed for tantrums and early childhood psychopathology using diagnostic interviews and then continually assessed using diagnostic interviews over 10 subsequent time points throughout childhood and adolescence. We identified two unique groupings of tantrum behaviors: aggression towards others/objects (e.g., hitting others) and aggression towards self (e.g., hitting self). While both types of tantrum behaviors were associated with early childhood psychopathology severity, tantrum behaviors characterized by aggression towards self were more predictive of later psychopathology. Children displaying high levels of both types of tantrum behaviors had more severe externalizing problems during early childhood and more severe depression and oppositional defiant disorder across childhood and adolescence. Findings suggest that tantrum behaviors characterized by aggression towards self are particularly predictive of later psychopathology.

Depression is often a relapsing disorder that can start as early as preschool. In adults and adolescents, family and peer criticism/conflict and rejection sensitivity are associated with recurrence. However, it is not yet clear whether similar factors are associated with relapse among early adolescent youth who experience depression starting in preschool. The current study used data from a unique longitudinal study, which began at preschool age and included 161 youth. It oversampled for those with preschool‐onset major depressive disorder (PO‐MDD) and included community controls (CCs). When the youth were 7–12 years old, we administered diagnostic interviews and weekly surveys over 1 year. These measures were repeated at ages 8–15, along with ecological momentary assessment (EMA) three to four times a day for 8 days, and an event‐related potential (ERP) task assessing neural reactivity to social feedback. We assessed whether youth with a history of PO‐MDD who were experiencing depression in adolescence (i.e., non‐remitted youth [NRY]) versus those who were not (i.e., remitted youth [RY]) and/or CCs experienced greater family/peer criticism/conflict and sensitivity to interpersonal stress. Across multiple time scales (weekly and daily), NRY experienced greater parent and peer criticism/conflict and were more reactive to such criticism/conflict than RY and CCs. Further, in weekly surveys, NRY displayed a stronger association between experiencing interpersonal criticism/conflict and depression compared to CCs, with a similar trend compared to RY. In momentary assessments, NRY showed a longer‐lasting association between family conflict and both negative affect (NA) and connectedness than RY. In addition, neural measures indicated a stronger response to negative social feedback among NRY. Taken together, these data identify potential interpersonal treatment targets for youth with early‐onset depression who continue to experience depression into adolescence. Trial Registration: ClinicalTrials.gov identifier: NCT02076425

Purpose of Review We review findings related to predictors, correlates, outcomes, and treatment of preschool depression that have been published in the last 3 years. Recent Findings Preschool depression displays a chronic course through late adolescence and is associated with temperamental and personality traits, poorer physical health, and negative parenting practices. Preschool depression predicts deficits into adolescence, including social difficulties and blunted neural response to rewards. Depressed preschoolers can experience suicidal ideation and behaviors and display an accurate understanding of the finality of death. A treatment for preschool depression has now been validated that uses the parent-child relationship to enhance emotion development and reduce depressive symptoms. Summary Preschool depression is homotypic with depression that occurs later in life. Future work elucidating mechanisms through which preschool depression develops and informs the sub-groups for which particular treatments may be most effective will have considerable implications for prevention and early intervention.

The classic Aesop’s fable, Crow and the Pitcher, has inspired a major line of research in comparative cognition. Over the past several years, five articles (over 32 experiments) have examined the ability of corvids (e.g., rooks, crows, and jays) to complete lab-based analogs of this fable, by requiring them to drop stones and other objects into tubes of water to retrieve a floating worm (Bird and Emery in Curr Biol 19:1–5, 2009b; Cheke et al. in Anim Cogn 14:441–455, 2011; Jelbert et al. in PLoS One 3:e92895, 2014; Logan et al. in PLoS One 7:e103049, 2014; Taylor et al. in Gray R D 12:e26887, 2011). These researchers have stressed the unique potential of this paradigm for understanding causal reasoning in corvids. Ghirlanda and Lind (Anim Behav 123:239–247, 2017) re-evaluated trial-level data from these studies and concluded that initial preferences for functional objects, combined with trial-and-error learning, may account for subjects’ performance on key variants of the paradigm. In the present paper, we use meta-analytic techniques to provide more precise information about the rate and mode of learning that occurs within and across tasks. Within tasks, subjects learned from successful (but not unsuccessful) actions, indicating that higher-order reasoning about phenomena such as mass, volume, and displacement is unlikely to be involved. Furthermore, subjects did not transfer information learned in one task to subsequent tasks, suggesting that corvids do not engage with these tasks as variants of the same problem (i.e., how to generate water displacement to retrieve a floating worm). Our methodological analysis and empirical findings raise the question: Can Aesop’s fable studies distinguish between trial-and-error learning and/or higher-order causal reasoning? We conclude they cannot.

The Aesop's Fable Paradigm is a collection of essays that explore the cutting-edge intersection of Folklore and Science. From moralizing fables to fantastic folktales, humans have been telling stories about animals—animals who can talk, feel, think, and make moral judgments just as we do—for a very long time. In contrast, scientific studies of the mental lives of animals have professed to be investigating the nature of animal minds slowly, cautiously, objectively, with no room for fanciful tales, fables, or myths. But recently, these folkloric and scientific traditions have merged in an unexpected and shocking way: scientists have attempted to prove that at least some animal fables are actually true. These interdisciplinary chapters examine how science has targeted the well-known Aesop's fable The Crow and the Pitcher as their starting point. They explore the ever-growing set of experimental studies which purport to prove that crows possess an understanding of higher-order concepts like weight, mass, and even Archimedes' insight about the physics of water displacement. The Aesop's Fable Paradigm explores how these scientific studies are doomed to accomplish little more than to mirror anthropomorphic representations of animals in human folklore and reveal that the problem of folkloric projection extends far beyond the Aesop's Fable Paradigm into every nook and cranny of research on animal cognition.