Why wearing a yellow hat is impossible: Chinese and U.S. children's possibility judgments.

When thinking about possibility, one can consider both epistemic and deontic principles (i.e., physical possibility and permissibility).

Exploring factors influencing young children's learning from storybooks: Interactive and multimedia features.

Electronic storybooks are increasingly popular with preschoolers. The purpose of our research was to investigate the effects of interactive and multimedia features in electronic storybooks on preschoolers' learning. We assigned 4- to 6-year-old children to different reading conditions in two experiments.

Never trust a stranger: Effects of explicit belief statements from strangers on children's reality status beliefs and beliefs about consensus.

Children learn about much of the world through testimony and may hear explicit belief statements (e.g., "I believe in God" or "climate change is real") about entities whose existence is controversial.

Brave new world: Imaginative fictions offer simulated safety and actual benefits.

Human engagement with imaginary worlds pervades history (e.g., Paleolithic cave paintings) and development (e.

Epistemic Vigilance in Early Ontogeny: Children's Use of Nonverbal Behavior to Detect Deception.

This study examines the development of children's ability to modulate their trust in verbal testimony as a function of nonverbal behavior. Participants included 83 children (26 four-year-olds, 29 five-year-olds, and 28 six-year-olds) that were tasked with locating a toy hidden in one of two boxes. Before deciding the location, participants watched a video of an adult providing verbal and nonverbal cues about the location of the toy.

Children's Use of Testimony to Determine Reality Status.

Verbal testimony about reality status is critical but often contradictory. These studies address whom children consider reliable sources of information about reality and how they evaluate conflicting testimony. In Study 1, seventy 4- to 8-year-olds heard an adult or child provide testimony about how to cook food and use toys, and about the reality of unfamiliar entities.

"When something like a ladybug lands on you": Origins and development of the concept of luck.

In Study 1, 103 children ages 4 through 10 answered questions about their concept of and belief in luck, and completed a story task assessing their use of luck as an explanation for events. The interview captured a curvilinear trajectory of children's belief in luck from tentative belief at age 4 to full belief at age 6, weakening belief at age 8, and significant skepticism by age 10. The youngest children appeared to think of luck simply as a positive outcome; with age, children increasingly considered the unexpected nature of lucky outcomes and many came to view luck as synonymous with chance.

Reality Status Judgments of Real and Fantastical Events in Children's Prefrontal Cortex: An fNIRS Study.

The present study aimed to examine neural mechanisms underlying the ability to differentiate reality from fantasy. Using functional near-infrared spectroscopy (fNIRS), we measured prefrontal activations in children and adults while they performed a reality judgment task. Participants' task was to judge the reality status of events in fantastical and realistic videos.

Interactions Between Knowledge and Testimony in Children's Reality-Status Judgments.

In two studies we attempt to capture the information processing abilities underlying children's reality-status judgments. Forty 5- to 6-year-olds and 53 7- to 8-year-olds heard about novel entities (animals) that varied in their fit with children's world knowledge. After hearing about each entity, children could either guess reality status immediately or listen to testimony first.

Wondering how: Children's and adults' explanations for mundane, improbable, and extraordinary events.

Children aged 5 through 9 years and adults judged the reality status of parallel mundane, improbable, and extraordinary events, generated an explanation for each event, and evaluated explanations purportedly generated by other participants. Participants of all ages claimed that mundane and improbable events could happen, whereas extraordinary events could not. Participants also overwhelmingly generated natural explanations for all three types of events but did so most for mundane, less for improbable, and least for extraordinary events.

The development of children's concepts of invisibility.

One of the most striking examples of appearance-reality discrepancy is invisibility - when something has no appearance yet still exists. The issue of invisibility sits at the juncture of two foundational ontological distinctions, that between appearance and reality and that between reality and non-reality. We probed the invisibility concepts of 47 3-7-year-olds using two sets of tasks: (1) an entity task, in which children were queried about the visibility and reality status of a variety of both visible and invisible entities, and (2) two standard appearance-reality tasks.

What do mind readers know and what do we know about mind readers?

In this commentary, I raise various questions about Kim and Harris's fascinating findings. I ask what kind of knowledge children expect telepathic individuals to have, who children might consider to be good mind readers, why children value telepathy, and how puzzled children are by telepathy. I suggest potential ways to address some of these questions and end by reiterating the importance of probing individual differences in scepticism and credulity.

Revisiting the fantasy-reality distinction: children as naïve skeptics.

Far from being the uncritical believers young children have been portrayed as, children often exhibit skepticism toward the reality status of novel entities and events. This article reviews research on children's reality status judgments, testimony use, understanding of possibility, and religious cognition. When viewed from this new perspective it becomes apparent that when assessing reality status, children are as likely to doubt as they are to believe.

Does "patient-reported discomfort" from bronchoscopy differ over time?

Background: The optimal time to assess patient satisfaction with bronchoscopy has not been established. This study aimed to compare patient comfort scores recorded immediately after bronchoscopy with those obtained at follow-up, 7 to 14 days later.

Methods: A total of 240 patients undergoing bronchoscopy were recruited.

Development of the use of conversational cues to assess reality status.

In this study we assessed children's ability to use information overheard in other people's conversations to judge the reality status of a novel entity. Three- to 9-year-old children (N = 101) watched video clips in which two adults conversed casually about a novel being. Videos contained statements that either explicitly denied, explicitly affirmed, or implicitly acknowledged the entity's existence.

Does God make it real? Children's belief in religious stories from the Judeo-Christian tradition.

Four- to 6-year-old children (N = 131) heard religious or nonreligious stories and were questioned about their belief in the reality of the story characters and events. Children had low to moderate levels of belief in the characters and events. Children in the religious story condition had higher levels of belief in the reality of the characters and events than did children in the nonreligious condition; this relation strengthened with age.

Return of the Candy Witch: individual differences in acceptance and stability of belief in a novel fantastical being.

Recent research indicates that preschoolers make sophisticated choices in accepting testimony as a source of knowledge. Nonetheless, many children accept fantastical beings as real based on misleading testimony. The present study probes factors associated with belief in a novel fantastical figure, the Candy Witch, that 3- to 7-year-olds heard about at school.

The development of children's ability to use evidence to infer reality status.

These studies investigate children's use of scientific reasoning to infer the reality status of novel entities. Four- to 8-year-olds heard about novel entities and were asked to infer their reality status from 3 types of evidence: supporting evidence, irrelevant evidence, and no evidence. Experiment 1 revealed that children used supporting versus irrelevant and no evidence differentially.

Development of beliefs about storybook reality.

The goal of this research was to assess children's beliefs about the reality status of storybook characters and events. In Experiment 1, 156 preschool age children heard realistic, fantastical, or religious stories, and their understanding of the reality status of the characters and events in the stories was assessed. Results revealed that 3-year-olds were more likely to judge characters as real than were 4- and 5-year-olds, but most children judged all characters as not real for all story types.

Effects of context on judgments concerning the reality status of novel entities.

Three studies examined the effects of context on decisions about the reality status of novel entities. In Experiment 1 (144, 3- to 5-year-olds), participants less often claimed that novel entities were real when they were introduced in a fantastical than in a scientific context. Experiment 2 (61, 4- to 5-year-olds) revealed that defining novel entities with reference to scientific entities had a stronger effect on reality status judgments than did hearing scientifically oriented stories before encountering the novel entities.

Verbal-behavioral dissociations in development.

Verbal and behavioral measures of children's knowledge are frequently dissociated. These situations represent a largely untapped but important resource for furthering an understanding of human cognition. In this paper, verbal-behavioral dissociations in children are discussed and analyzed, drawing from a wide range of domains.

A visit from the Candy Witch: factors influencing young children's belief in a novel fantastical being.

Factors hypothesized to affect beliefs in fantastical beings were examined by introducing children to a novel fantastical entity, the Candy Witch. Results revealed that among older preschoolers, children who were visited by the Candy Witch exhibited stronger beliefs in the Candy Witch than did those who were not. Among children who were visited, older children had stronger beliefs than did younger children.

Development of beliefs about the origins and controllability of dreams.

In three studies the authors investigated the development of beliefs about dreaming. Study 1 assessed 3- to 5-year-old children's beliefs about the origins and controllability of dreams. Results revealed significant changes in children's beliefs about the roles of behavioral experiences and mental processes in the generation of dream content.

Initiating a Dialogue.

The diversity of interpretations and themes raised by the commentators testifies to the richness of the issues addressed in this article, and to the need for continued research and debate on this topic. In my reply, I respond to some of the specific criticisms of the commentators by focus most of my efforts on highlighting and exploring what I consider to be the major themes running through the commentaries.