72. Identifying Liars Through Automatic Decoding Of Children’S Facial Expressions., Kaila C. Bruer, Sarah Zanette, Xiaopan Ding, Thomas D. Lyon, Kang Lee
Sep 2019
72. Identifying Liars Through Automatic Decoding Of Children’S Facial Expressions., Kaila C. Bruer, Sarah Zanette, Xiaopan Ding, Thomas D. Lyon, Kang Lee
Thomas D. Lyon
This study explored whether children’s (N=158; 4-9 years-old) nonverbal facial expressions can be used to identify when children are being deceptive. Using a computer vision program to automatically decode children’s facial expressions according to the Facial Action Coding System, this study employed machine learning to determine whether facial expressions can be used to discriminate between children who concealed breaking a toy(liars) and those who did not break a toy(nonliars). Results found that, regardless of age or history of maltreatment, children’s facial expressions could accurately (73%) distinguished between liars and nonliars. Two emotions, surprise and fear, were more strongly expressed by …
70. Children’S Concealment Of A Minor Transgression: The Role Of Age, Maltreatment, And Executive Functioning., Shanna Williams, Kelly Mcwilliams, Thomas D. Lyon
Jul 2019
70. Children’S Concealment Of A Minor Transgression: The Role Of Age, Maltreatment, And Executive Functioning., Shanna Williams, Kelly Mcwilliams, Thomas D. Lyon
Thomas D. Lyon
This study examined the role of age, maltreatment status, and executive functioning (EF) on 752 4- to 9-year-old maltreated and nonmaltreated children’s recall disclosure of a transgression in which they appeared to have broken toys while playing with a stranger. Interviewers used narrative practice rapport-building and then questioned children with free recall and cued recall questions. Younger and maltreated children were more likely to disclose during rapport-building, whereas older and nonmaltreated children were more likely to disclose in response to recall questions. Working memory deficits appeared to mediate the relation between children’s characteristics and disclosure during rapport, but not during …
69. The Role Of Kinship And Siblings In Young Children’S Placement Preferences., Kelli Dickerson, Thomas D. Lyon, Jodi A. Quas
May 2019
69. The Role Of Kinship And Siblings In Young Children’S Placement Preferences., Kelli Dickerson, Thomas D. Lyon, Jodi A. Quas
Thomas D. Lyon
Although considerable attention has been directed toward the most appropriate placement for children following removal from home due to maltreatment, very little of this attention has focused on children’s stated preferences, particularly when they are young. Specifically, children under 12 years of age are typically presumed incompetent to form reasoned judgments about their best interests in placement. This assumption, however, has rarely been tested directly. We surveyed 100 4- to 11-year-olds removed from home because of maltreatment about their placement preferences. Children were less likely to indicate they wanted to return home if they were placed with siblings or with …
68. Increasing Maltreated And Nonmaltreated Children’S Recall Disclosures Of A Minor Transgression: The Effects Of Back-Channel Utterances, A Promise To Tell The Truth And A Post-Recall Putative Confession., Kelly Mcwilliams, Stacia N. Stolzenberg, Shanna Williams, Thomas D. Lyon
May 2019
68. Increasing Maltreated And Nonmaltreated Children’S Recall Disclosures Of A Minor Transgression: The Effects Of Back-Channel Utterances, A Promise To Tell The Truth And A Post-Recall Putative Confession., Kelly Mcwilliams, Stacia N. Stolzenberg, Shanna Williams, Thomas D. Lyon
Thomas D. Lyon
Background: Children are often hesitant to disclose transgressions, particularly when they feel implicated, and frequently remain reluctant until confronted with direct questions. Given the risks associated with direct questions, an important issue is how interviewers can encourage honesty through recall questions. Objective: The present study examined the use of three truth induction strategies for increasing the accuracy and productivity of children’s reports about a transgression. Participants: A total of 285 4-to-9-year-old maltreated and nonmaltreated children. Methods: Each child took part in a play session with a stranger during which the child appeared to break some toys. A research assistant interviewed …
68. Increasing Maltreated And Nonmaltreated Children’S Recall Disclosures Of A Minor Transgression: The Effects Of Back-Channel Utterances, A Promise To Tell The Truth And A Post-Recall Putative Confession., Kelly Mcwilliams, Stacia N. Stolzenberg, Shanna Williams, Thomas D. Lyon
May 2019
68. Increasing Maltreated And Nonmaltreated Children’S Recall Disclosures Of A Minor Transgression: The Effects Of Back-Channel Utterances, A Promise To Tell The Truth And A Post-Recall Putative Confession., Kelly Mcwilliams, Stacia N. Stolzenberg, Shanna Williams, Thomas D. Lyon
Thomas D. Lyon
Background: Children are often hesitant to disclose transgressions, particularly when they feel implicated, and frequently remain reluctant until confronted with direct questions. Given the risks associated with direct questions, an important issue is how interviewers can encourage honesty through recall questions. Objective: The present study examined the use of three truth induction strategies for increasing the accuracy and productivity of children’s reports about a transgression. Participants: A total of 285 4-to-9-year-old maltreated and nonmaltreated children. Methods: Each child took part in a play session with a stranger during which the child appeared to break some toys. A research assistant interviewed …
67. The Utility Of Direct Questions In Eliciting Subjective Content From Children Disclosing Sexual Abuse., Stacia N. Stolzenberg, Shanna Williams, Kelly Mcwilliams, Catherine Liang, Thomas D. Lyon
Feb 2019
67. The Utility Of Direct Questions In Eliciting Subjective Content From Children Disclosing Sexual Abuse., Stacia N. Stolzenberg, Shanna Williams, Kelly Mcwilliams, Catherine Liang, Thomas D. Lyon
Thomas D. Lyon
Background: Children alleging sexual abuse rarely exhibit emotion when disclosing, but they may be able to describe their subjective reactions to abuse if asked. Objective: This study examined the extent to which different types of questions in child sexual abuse interviews elicited subjective content, namely emotional reactions, cognitive content, and physical sensations.
Participants and Setting: The study included transcripts of 205 Child Advocacy Center interviews with 4- to 12-year-old children alleging sexual abuse.
Methods: We coded questions for question type, distinguishing among invitations, wh- questions, yes/no and forced-choice questions, and suggestive questions. We coded both questions and answers for whether …
66. Younger And Older Adults’ Lie-Detection And Credibility Judgments Of Children’S Coached Reports, Alison M. O'Connor, Thomas D. Lyon, Angela D. Evans
Jan 2019
66. Younger And Older Adults’ Lie-Detection And Credibility Judgments Of Children’S Coached Reports, Alison M. O'Connor, Thomas D. Lyon, Angela D. Evans
Thomas D. Lyon
Previous research has examined young and middle-aged adults’ perceptions of child witnesses; however, no research to date has examined how potential older adult jurors may perceive a child witness. The present investigation examined younger (18-30 years, N = 100) and older adults’ (66-89 years, N = 100) lie-detection and credibility judgments when viewing children’s truthful and dishonest reports. Participants viewed eight child interview videos where children (9 to 11 years of age) either provided a truthful report or a coached fabricated report to conceal a transgression. Participants provided lie-detection judgments following all eight videos and credibility assessments following the first …
64. Effects Of The Putative Confession Instruction On Perceptions Of Children’S True And False Statements, Jennifer Gongola, Nicholas Scurich, Thomas D. Lyon
Oct 2018
64. Effects Of The Putative Confession Instruction On Perceptions Of Children’S True And False Statements, Jennifer Gongola, Nicholas Scurich, Thomas D. Lyon
Thomas D. Lyon
The putative confession instruction (“[suspect] told me everything that happened and wants you to tell the truth”) during forensic interviews with children has been shown to increase the accuracy of children’s statements, but it is unclear whether adult’s perceptions are sensitive to this salutary effect. The present study examined how adults perceive children’s true and false responses to the putative confession (PC) instruction. Participants (n = 299) watched videotaped interviews of children and rated the child’s credibility and the truthfulness of his/her statements. When viewing children’s responses to the PC instruction, true and false statements were rated as equally credible, …
62. The Effects Of Implicit Encouragement And The Putative Confession On Children’S Memory Reports., Kyndra C. Cleveland, Jodi A. Quas, Thomas D. Lyon
Mar 2018
62. The Effects Of Implicit Encouragement And The Putative Confession On Children’S Memory Reports., Kyndra C. Cleveland, Jodi A. Quas, Thomas D. Lyon
Thomas D. Lyon
The current study tested the effects of two interview techniques on children's report productivity and accuracy following exposure to suggestion: implicit encouragement (backchanneling, use of children's names) and the putative confession (telling children that a suspect "told me everything that happened and wants you to tell the truth"). One hundred and forty-three, 3-8-year-old children participated in a classroom event. One week later, they took part in a highly suggestive conversation about the event and then a mock forensic interview in which the two techniques were experimentally manipulated. Greater use of implicit encouragement led to increases, with age, in children's narrative …
19. Child Witnesses., Thomas D. Lyon, Kelly Mcwilliams, Shanna Williams
Nov 2017
19. Child Witnesses., Thomas D. Lyon, Kelly Mcwilliams, Shanna Williams
Thomas D. Lyon
In this chapter we provide an overview of psychological issues involving children’s capacities as witnesses. First, we discuss the kinds of cases in which children are usually involved. Across different courts, one most often sees children describing abuse at the hands of familiar adults. Second, we describe the difficulties children encounter in disclosing abuse, particularly when it is perpetrated by adults close to them. These dynamics lead most children to remain silent, and only the most forthcoming children to disclose. Third, we suggest a framework for assessing children’s allegations, in which child-generated and adult-generated information lie on opposite ends of …
61. The Relation Between Young Children’S False Statements And Response Latency, Executive Functioning, And Truth–Lie Understanding., Shanna Williams, Elizabeth C. Ahern, Thomas D. Lyon
Nov 2017
61. The Relation Between Young Children’S False Statements And Response Latency, Executive Functioning, And Truth–Lie Understanding., Shanna Williams, Elizabeth C. Ahern, Thomas D. Lyon
Thomas D. Lyon
This study examined relations between children’s false statements and response latency, executive functioning, and truth-lie understanding in order to understand what underlies children’s emerging ability to make false statements. A total of 158 (2- to 5-year-old) children earned prizes for claiming that they were looking at birds even when presented with images of fish. Children were asked recall (“what do you have?”), recognition (“do you have a bird/fish?”), and outcome (“did you win/lose?”) questions. Response latencies were greater when children were presented with fish pictures than bird pictures, particularly when they were asked recall questions, and were greater for false …
60. The Effects Of Promising To Tell The Truth, The Putative Confession, And Recall And Recognition Questions On Maltreated And Non-Maltreated Children’S Disclosure Of A Minor Transgression., Jodi A. Quas, Stacia N. Stolzenberg, Thomas D. Lyon
Nov 2017
60. The Effects Of Promising To Tell The Truth, The Putative Confession, And Recall And Recognition Questions On Maltreated And Non-Maltreated Children’S Disclosure Of A Minor Transgression., Jodi A. Quas, Stacia N. Stolzenberg, Thomas D. Lyon
Thomas D. Lyon
This study examined the utility of two interview instructions designed to overcome children’s reluctance to disclose transgressions: eliciting a promise from children to tell the truth and the putative confession (telling children that a suspect “told me everything that happened and wants you to tell the truth”). The key questions were whether the instructions increased disclosure in response to recall questions and in response to recognition questions that were less or more explicit about transgressions, and whether instructions were differentially effective with age. Two-hundred and seventeen 4- to 9-year-old maltreated and comparable non-maltreated children played with a stranger. This included …
59. Ask Versus Tell: Potential Confusion When Child Witnesses Are Questioned About Conversations, Stacia N. Stolzenberg, Kelly Mcwilliams, Thomas D. Lyon
May 2017
59. Ask Versus Tell: Potential Confusion When Child Witnesses Are Questioned About Conversations, Stacia N. Stolzenberg, Kelly Mcwilliams, Thomas D. Lyon
Thomas D. Lyon
Children’s potential confusion between “ask” and “tell” can lead to misunderstandings when child witnesses are asked to report prior conversations. The verbs distinguish both between interrogating and informing and between requesting and commanding. Children’s understanding was examined using both field (i.e., Study 1) and laboratory (i.e., Studies 2-4) methods. Study 1 examined 100 5- to 12-year-olds’ trial testimony in child sexual abuse cases, and found that potentially ambiguous use of ask and tell was common, typically found in yes/no questions that elicited unelaborated answers, and virtually never clarified by attorneys or child witnesses. Studies 2-4 examined 345 maltreated 6- to …
58. The Effects Of Secret Instructions And Yes/No Questions On Maltreated And Non-Maltreated Children’S Reports Of A Minor Transgression., Elizabeth C. Ahern, Stacia N. Stolzenberg, Kelly Mcwilliams, Thomas D. Lyon
Jan 2017
58. The Effects Of Secret Instructions And Yes/No Questions On Maltreated And Non-Maltreated Children’S Reports Of A Minor Transgression., Elizabeth C. Ahern, Stacia N. Stolzenberg, Kelly Mcwilliams, Thomas D. Lyon
Thomas D. Lyon
This study examined the effects of secret instructions (distinguishing between good/bad secrets and encouraging disclosure of bad secrets) and yes/no questions (DID: “Did the toy break?” versus DYR: “Do you remember if the toy broke?”) on 262 4- to 9- year old maltreated and nonmaltreated children’s reports of a minor transgression. Over two-thirds of children failed to disclose the transgression in response to free recall (invitations and cued invitations). The secret instruction increased disclosures early in free recall, but was not superior to no instruction when combined with cued invitations. Yes/no questions specifically asking about the transgression elicited disclosures from …
57. Spatial Language, Question Type, And Young Children’S Ability To Describe Clothing: Legal And Developmental Implications., Stacia N. Stolzenberg, Kelly Mcwilliams, Thomas D. Lyon
Dec 2016
57. Spatial Language, Question Type, And Young Children’S Ability To Describe Clothing: Legal And Developmental Implications., Stacia N. Stolzenberg, Kelly Mcwilliams, Thomas D. Lyon
Thomas D. Lyon
Children’s descriptions of clothing placement and touching with respect to clothing are central to assessing child sexual abuse allegations. This study examined children’s ability to answer the types of questions attorneys and interviewers typically ask about clothing, using the most common spatial terms (on/off, outside/inside, over/under). Ninety-seven 3- to 6-year-olds were asked yes/no (e.g. “Is the shirt on?”), forced-choice (e.g., “Is the shirt on or off?”), open-choice (e.g., “Is the shirt on or off or something else?”), or where questions (e.g., “Where is the shirt?”) about clothing using a human figurine, clothing, and stickers. Across question types, children generally did …
55. Challenging The Credibility Of Alleged Victims Of Child Sexual Abuse In Scottish Courts., Zsófia Szojka, Samantha J. Andrews, Michael E. Lamb, Stacia N. Stolzenberg, Thomas D. Lyon
Nov 2016
55. Challenging The Credibility Of Alleged Victims Of Child Sexual Abuse In Scottish Courts., Zsófia Szojka, Samantha J. Andrews, Michael E. Lamb, Stacia N. Stolzenberg, Thomas D. Lyon
Thomas D. Lyon
This study examined the effects of credibility-challenging questions (n = 2,729) on 62 5- to 17-year-olds’ testimony in child sexual abuse cases in Scotland by categorizing the type, source, and content of the credibility-challenging questions defence lawyers asked and assessing how children responded. Credibility-challenging questions comprised 14.9% of all questions asked during cross-examination. Of defence lawyers’ credibility-challenging questions, 77.8% focused generally on children’s honesty, whereas the remainder referred to specific inconsistencies in the children’s testimony. Children resisted credibility challenges 54% of the time, significantly more often than they provided compliant responses (26.8%). The tendency to resist was significantly lower for …
53. Relations Between Attorney Temporal Structure And Children's Response Productivity In Cases Of Alleged Child Sexual Abuse., J. Zoe Klemfuss, Kyndra C. Cleveland, Thomas D. Lyon, Jodi A. Quas
Jul 2016
53. Relations Between Attorney Temporal Structure And Children's Response Productivity In Cases Of Alleged Child Sexual Abuse., J. Zoe Klemfuss, Kyndra C. Cleveland, Thomas D. Lyon, Jodi A. Quas
Thomas D. Lyon
Purpose. Previous research has demonstrated that attorney question format relates to child witness’ response productivity. However, little work has examined the extent to which attorneys provide temporal structure in their questions, and the effects of this structure on children’s responding. The purpose of this study was to address this gap in the literature to identify methods by which attorneys increase children’s response productivity on the stand without risking objections from opposing counsel for ‘calling for narrative answers.
Methods. In this study, we coded criminal court transcripts involving child witnesses (5–18 years) for narrative structure in attorney questions and productivity in …
48. Valence, Implicated Actor, And Children's Acquiescence To False Suggestions, Kyndra C. Cleveland, Jodi A. Quas, Thomas D. Lyon
Dec 2015
48. Valence, Implicated Actor, And Children's Acquiescence To False Suggestions, Kyndra C. Cleveland, Jodi A. Quas, Thomas D. Lyon
Thomas D. Lyon
Although adverse effects of suggestive interviewing on children's accuracy are well documented, it remains unclear as to whether these effects vary depending on the valence of and the actor implicated in suggestions. In this study, 124 3-8-year-olds participated in a classroom activity and were later questioned about positive and negative false details. The interviewer provided positive reinforcement when children acquiesced to suggestions and negative feedback when they did not. Following reinforcement or feedback, young children were comparably suggestible for positive and negative details. With age, resistance to suggestions about negative details merged first, followed by resistance to suggestions about positive …
30. Facilitating Maltreated Children's Use Of Emotional Language., Elizabeth C. Ahern, Thomas D. Lyon
Aug 2013
30. Facilitating Maltreated Children's Use Of Emotional Language., Elizabeth C. Ahern, Thomas D. Lyon
Thomas D. Lyon
This study examined the effects of rapport (emotional, National Institute of Child Health and Human Development [NICHD]) and prompt type (what-next, cued-action, cued-emotion, what-think) on one hundred forty-two 4-9-year-old maltreated children's spontaneous and prompted emotional language. Children in the emotional-rapport condition narrated the last time they felt good and the last time they felt bad on the playground. Children in the NICHD-rapport condition narrated their last birthday party and what happened yesterday. Following rapport, all children were presented a series of story stems about positive and negative situations. Emotional-rapport minimally affected children’s use of emotional language. Cued-emotion prompts were most …
Predators And Propensity: The Proper Approach For Determining The Admissibility Of Prior Bad Acts Evidence In Child Sexual Abuse Prosecutions, Basyle Tchividjian
Jan 2012
Predators And Propensity: The Proper Approach For Determining The Admissibility Of Prior Bad Acts Evidence In Child Sexual Abuse Prosecutions, Basyle Tchividjian
Faculty Publications and Presentations
PREDATORS AND PROPENSITY: THE PROPER APPROACH FOR DETERMINING THE ADMISSIBILITY OF PRIOR BAD ACTS EVIDENCE IN CHILD SEXUAL ABUSE PROSECUTIONS
Basyle J. Tchividjian†
Abstract
The admissibility of prior bad act evidence in child sexual abuse prosecutions oftentimes makes the difference between a guilty and not guilty verdict. Recently, jurisdictions have growingly embraced the admission of such evidence for the purpose of establishing the defendant’s propensity to sexually victimize children. Due to the potentially high prejudicial effect of admitting propensity evidence, it is more critical than ever that courts carefully apply the decisive evidentiary gatekeeper, the probative value balancing test …
9. The Problem Of Child Sexual Abuse: Response., Jennifer J. Freyd, Frank W. Putnam, Thomas D. Lyon, Kathryn A. Becker-Blease, Ross E. Cheit, Nancy B. Siegel, Kathy Pezdek
Nov 2005
9. The Problem Of Child Sexual Abuse: Response., Jennifer J. Freyd, Frank W. Putnam, Thomas D. Lyon, Kathryn A. Becker-Blease, Ross E. Cheit, Nancy B. Siegel, Kathy Pezdek
Thomas D. Lyon
THE POLICY FORUM “THE SCIENCE OF CHILD sexual abuse” by J. J. Freyd et al. (22 Apr., p. 501) provides an extremely important call to action to the scientific community. In 1999, James Mercy, Senior Scientist at the U.S. Centers for Disease Control and Prevention, noted the importance of viewing child sexual abuse with “new eyes” (1). The implementation of Freyd et al.’s policy recommendations would help us to do this. For too long, the fact that the topic makes us uneasy has caused too many of us to avert our eyes. But what if child sexual abuse were a …
8. The Science Of Child Sexual Abuse., Jennifer J. Freyd, Frank W. Putnam, Thomas D. Lyon, Kathryn A. Becker-Blease, Ross E. Cheit, Nancy B. Siegel, Kathy Pezdek
Oct 2005
8. The Science Of Child Sexual Abuse., Jennifer J. Freyd, Frank W. Putnam, Thomas D. Lyon, Kathryn A. Becker-Blease, Ross E. Cheit, Nancy B. Siegel, Kathy Pezdek
Thomas D. Lyon
Child sexual abuse (CSA) involving sexual contact between an adult (usually male) and a child has been reported by 20% of women and 5 to 10% of men worldwide (1–3). Surveys likely underestimate prevalence because of underreporting and memory failure (4–6). Although official reports have declined somewhat in the United States over the past decade (7), close to 90% of sexual abuse cases are never reported to the authorities (8).
8. Speaking With Children: Advice From Investigative Interviewers., Thomas D. Lyon
Dec 2004
8. Speaking With Children: Advice From Investigative Interviewers., Thomas D. Lyon
Thomas D. Lyon
Imagine that you are treating a child suffering from the effects of neglect. You do not suspect sexual abuse, and do not directly question the child about abuse, but she makes what sounds like anabuse disclosure. Or, you hear from another source (a sibling, for example, or a caretaker) that thechild has made statements hinting that she was abused. What should you do? If you decide to question the child, you may inadvertently suggest information. Even if you are careful to avoid
leading questions, you may later be attacked for contaminating the child=s story, given the inherent polarization …
3. The Relevance Ratio: Evaluating The Probative Value Of Expert Testimony In Child Sexual Abuse Cases., Thomas D. Lyon, Jonathan J. Koehler
Aug 1996
3. The Relevance Ratio: Evaluating The Probative Value Of Expert Testimony In Child Sexual Abuse Cases., Thomas D. Lyon, Jonathan J. Koehler
Thomas D. Lyon
It is hard to overstate the importance of expert testimony in American courtrooms. Much of this testimony concerns scientific matters that are beyond the ken of ordinary experience. In cases where scientific matters play a central role, jurors may give substantial weight to expert testimony or even treat it as dispositive. Standards pertaining to the admissibility of scientific testimony are critical to the outcome in many trials.
