Hits and Misses: Digital Contact Tracing in a Pandemic.

Traditional contact tracing is one of the most powerful weapons people have in the battle against a pandemic, especially when vaccines do not yet exist or do not afford complete protection from infection. But the effectiveness of contact tracing hinges on its ability to find infected people quickly and obtain accurate information from them. Therefore, contact tracing inherits the challenges associated with the fallibilities of memory. Against this backdrop, digital contact tracing is the "dream scenario"-an unobtrusive, vigilant, and accurate recorder of danger that should outperform manual contact tracing on every dimension. There is reason to celebrate the success of digital contact tracing. Indeed, epidemiologists report that digital contact tracing probably reduced the incidence of COVID-19 cases by at least 25% in many countries, a feat that would have been hard to match with its manual counterpart. Yet there is also reason to speculate that digital contact tracing delivered on only a fraction of its potential because it almost completely ignored the relevant psychological science. We discuss the strengths and weaknesses of digital contact tracing, its hits and misses in the COVID-19 pandemic, and its need to be integrated with the science of human behavior.

Police Investigators' Perceptions of the Challenges Associated With Interviewing Adult Sexual Assault Complainants.

Although police organizations have devoted considerable effort to training investigators in evidence-based witness interviewing techniques, there is some suggestion that current practices do not meet the multifaceted requirements of sexual assault cases. Here, we assessed the specific challenges inherent in conducting interviews with adult sexual assault complainants, by conducting in-depth interviews with 21 experienced investigators from both Australia and New Zealand. The challenges that investigators identified fell into three broad themes: meeting the evidential needs of sexual assault investigations, establishing credibility, and managing complainant vulnerabilities. We discuss how the investigative interview process might be modified in line with these challenges.

Trivially informative semantic context inflates people's confidence they can perform a highly complex skill.

Some research suggests people are overconfident because of personality characteristics, lack of insight, or because overconfidence is beneficial in its own right. But other research fits with the possibility that fluent experience in the moment can rapidly drive overconfidence. For example, fluency can push people to become overconfident in their ability to throw a dart, know how rainbows form or predict the future value of a commodity. But surely there are limits to overconfidence. That is, even in the face of fluency manipulations known to increase feelings of confidence, reasonable people would reject the thought that they, for example, might be able to land a plane in an emergency. To address this question, we conducted two experiments comprising a total of 780 people. We asked some people (but not others) to watch a trivially informative video of a pilot landing a plane before they rated their confidence in their own ability to land a plane. We found watching the video inflated people's confidence that they could land a plane. Our findings extend prior work by suggesting that increased semantic context creates illusions not just of prior experience or understanding-but also of the ability to actually do something implausible.

Contact Tracing: A Memory Task With Consequences for Public Health.

In the battle for control of coronavirus disease-19 (COVID-19), we have few weapons. Yet contact tracing is among the most powerful. Contact tracing is the process by which public-health officials identify people, or contacts, who have been exposed to a person infected with a pathogen or another hazard. For all its power, though, contact tracing yields a variable level of success. One reason is that contact tracing's ability to break the chain of transmission is only as effective as the proportion of contacts who are actually traced. In part, this proportion turns on the quality of the information that infected people provide, which makes human memory a crucial part of the efficacy of contact tracing. Yet the fallibilities of memory, and the challenges associated with gathering reliable information from memory, have been grossly underestimated by those charged with gathering it. We review the research on witnesses and investigative interviewing, identifying interrelated challenges that parallel those in contact tracing, as well as approaches for addressing those challenges.

Laypeople's beliefs about memory: disentangling the effects of age and time.

Cognitive scientists have firmly established that memory is vulnerable to decay and distortion. Yet laypeople - who may be required to evaluate memory evidence as jurors - have shown less awareness of memory fallibility. Although we might expect laypeople's knowledge of memory to have improved over time, research has yet to explore this issue while accounting for possible age-related changes. We administered a modified version of the Beliefs about Memory Survey (BAMS) to a community sample, investigating patterns of beliefs relating to memory permanence, repression of traumatic memories, and memory reconstruction. Older participants were more likely than younger participants to believe that traumatic memories can be repressed, while younger participants were more likely than their older counterparts to believe that memory is permanent, but also that memory is malleable. We assessed whether these beliefs were stable over time, by comparing our data to a sample of data collected 25 years earlier. Although contemporary beliefs about the repression of traumatic memories and memory reconstruction were more aligned with expert opinion than those of 25 years ago, beliefs about memory permanence were not. These findings highlight the need for continued education about memory and its shortcomings. We discuss ways of improving decisions about memory evidence.

Australian stakeholders' views on improving investigative interviews with adult sexual assault complainants.

Investigating sexual assault is one of the most challenging tasks in modern-day policing. Because investigators must rely largely on the account provided by the complainant to establish whether or not a criminal offence has occurred, the way in which these accounts are elicited becomes paramount. Although there is a strong empirical consensus on how to maximise the completeness and accuracy of eyewitness accounts, several researchers have suggested modifying adult sexual assault interview protocols to better satisfy investigative and evidential needs and to provide complainants with a greater level of emotional support. This article explores professional stakeholders' views on what form these changes might take, and identifies the broad themes that drive these views.

Suggestibility in neglected children: The influence of intelligence, language, and social skills.

We administered the GSS-2, a standardised measure of suggestibility, to 5- to 12-year-old children to ascertain whether neglected children's responses to leading questions distinguish them from those of their non-neglected counterparts. Neglected children (n = 75) were more likely than an age-matched sample of non-neglected children (n = 75) to yield to leading questions, despite no difference in their ability to recall the test stimuli. Subsequent collection of individual difference data from the neglected sample revealed that this effect could not be attributed to intelligence, language ability, problem behaviours, age at onset of neglect, or time spent in out-of-home care. With respect to social skill, however, suggestibility was positively correlated with communicative skill, and marginally positively correlated with assertion and engagement. While on the surface our social skills findings seem counter-intuitive, it is possible that maltreated children with relative strengths in these areas have learned to comply with adults in their environment as a way to protect themselves or even foster belonging. Our data, while preliminary, raise interesting questions about whether targeted interventions could help these children to more actively participate in decisions about their lives.

The "Good Old Days" of Courtroom Questioning: Changes in the Format of Child Cross-Examination Questions Over 60 Years.

Recent decades have seen an explosion of research into children's eyewitness capabilities and resulted in legal reform to render the adversarial trial process more child friendly. Many, however, have been left with the feeling that the most intimidating legal process for child complainants-cross-examination-has not changed meaningfully despite its potential to distort children's evidence. To test this possibility, we compared the cross-examination questioning of Australian child sexual abuse complainants in the 1950s to that used in contemporary cases. We found that the format of cross-examination questions has remained largely consistent over time, with leading questions still making up the bulk of the questions asked. The changes that we did observe, however, are concerning. Cross-examination questions posed to contemporary child complainants were less likely to be open-ended and more likely to be complex, relative to those asked in the 1950s. Crucially, contemporary complainants were asked 3 times as many cross-examination questions as they were 60 years ago. These changes are likely to have detrimental effects on child complainants and their evidence and could reduce the ability of jurors to reach just outcomes in these cases.

A historical comparison of Australian lawyers' strategies for cross-examining child sexual abuse complainants.

Many child sexual abuse complainants find the adversarial trial process so distressing that they say they would never report abuse again. Their concerns stem largely from cross-examination, in which the lawyer acting for the accused attempts to discredit their evidence. We examined whether-and if so, how-Australian defense lawyers' approaches to cross-examining child sexual abuse complainants have changed meaningfully over the past 60 years. To do this, we systematically evaluated cases that were prosecuted in the 1950s, comparing them to a matched set of cases from the turn of the twenty-first century. Despite the intervening law reforms designed to improve complainants' experience in court, we found that, relative to their historical counterparts, contemporary child complainants of sexual abuse are actually subjected to far lengthier cross-examinations involving a much broader range of strategies and associated tactics. These findings have important implications for future legal practice and reform, and for the way in which these are evaluated.

The Diagnostic Value of Children's Responses to Cross-Examination Questioning.

In response to a widespread belief within the legal system that cross-examination is instrumental in uncovering the truth, we examined the effect of cross-examination questioning on the reports of children who had-and had not-been coached to lie. A group of children, aged 6-11 years (N = 65), played three computer games with one of their parents. For half of the pairs, the parents-who acted as confederates-coached their children to make lies of commission concerning the occurrence of two target activities. For the remaining pairs, these two target activities actually occurred, and there was no coaching. Immediately afterwards, children were interviewed about the two activities. Those who-correctly or incorrectly-reported that both activities occurred were retained for the final sample (n = 56); these children were then interviewed again with both neutral questions and cross-examination-style challenges. Neither style of questioning elicited responses that discriminated between liars and truth-tellers: although the accuracy of children who were lying increased in response to cross-examination questions, the accuracy of truth-telling children saw a corresponding decrease. When asked neutral questions, children's responses tended to be consistent with their earlier responses, whether or not those responses were lies. These findings raise important questions about the function that cross-examination might serve in trials involving child witnesses. Copyright © 2016 John Wiley & Sons, Ltd.

Bloodstain pattern classification: Accuracy, effect of contextual information and the role of analyst characteristics.

It is becoming increasingly apparent that contextual information can exert a considerable influence on decisions about forensic evidence. Here, we explored accuracy and contextual influence in bloodstain pattern classification, and how these variables might relate to analyst characteristics. Thirty-nine bloodstain pattern analysts with varying degrees of experience each completed measures of compliance, decision-making style, and need for closure. Analysts then examined a bloodstain pattern without any additional contextual information, and allocated votes to listed pattern types according to favoured and less favoured classifications. Next, if they believed it would assist with their classification, analysts could request items of contextual information - from commonly encountered sources of information in bloodstain pattern analysis - and update their vote allocation. We calculated a shift score for each item of contextual information based on vote reallocation. Almost all forms of contextual information influenced decision-making, with medical findings leading to the highest shift scores. Although there was a small positive association between shift scores and the degree to which analysts displayed an intuitive decision-making style, shift scores did not vary meaningfully as a function of experience or the other characteristics measured. Almost all of the erroneous classifications were made by novice analysts.

Where There's Smoke, There's Fire: the Effect of Truncated Testimony on Juror Decision-making.

In countries that allow child complainants of abuse to present their direct evidence via pre-recorded videotape, the recording is sometimes truncated for relevance or admissibility purposes before it is presented to the jury. In two experiments, we investigated how this practice affects mock jurors' judgments of child credibility and defendant culpability when truncation omitted the child's less plausible allegations. Mock jurors read a transcript of a 6-year-old girl making an abuse allegation against the janitor at her school. Some jurors read this allegation only (truncated version), while others also read either one or two additional - but less plausible - allegations by the same child. Contrary to what we predicted, the presence of these additional allegations did not decrease jurors' belief in the core allegation, nor did it influence their judgments about the child complainant's honesty or cognitive competence. In fact, under at least one condition, reading additional, less plausible allegations made jurors more likely to pronounce the defendant guilty of the core allegation - even when jurors did not believe the additional allegations. This finding stands in stark contrast to prior research on jurors' evaluation of adults' testimony that includes implausible details. Future research in this area will help to elucidate the conditions under which the presentation of truncated testimony may or may not influence juror decision-making. Copyright © 2016 John Wiley & Sons, Ltd.

Exploring the role of contextual information in bloodstain pattern analysis: A qualitative approach.

During Bloodstain Pattern Analysis (BPA), an analyst may encounter various sources of contextual information. Although contextual bias has emerged as a valid concern for the discipline, little is understood about how contextual information informs BPA. To address this issue, we asked 15 experienced bloodstain pattern analysts from New Zealand and Australia to think aloud as they classified bloodstain patterns from two homicide cases. Analysts could request items of contextual information, and were required to state how each item would inform their analysis. Pathology reports and additional photographs of the scene were the most commonly requested items of information. We coded analysts' reasons for requesting contextual information--and the way in which they integrated this information--according to thematic analysis. We identified considerable variation in both of these variables, raising important questions about the role and necessity of contextual information in decisions about bloodstain pattern evidence.

Does contextual information bias bitemark comparisons?

A growing body of research suggests that the interpretation of fingerprint evidence is open to contextual bias. While there has been suggestion in the literature that the same might apply to bitemarks - a form of identification evidence in which a degree of contextual information during the comparison phase is generally unavoidable - there have so far been no empirical studies to test this assertion. We explored dental and non-dental students' ability to state whether two bitemarks matched, while manipulating task ambiguity and the presence and emotional intensity of additional contextual information. Provision of the contextual information influenced participants' decisions on the ambiguous bitemarks. Interestingly, when participants were presented with highly emotional images and subliminally primed with the words 'same' and 'guilty', they made fewer matches relative to our control condition. Dental experience also played a role in decision-making, with dental students making more matches as the experiment progressed, regardless of context or task ambiguity. We discuss ways that this exploratory research can be extended in future studies.

Are co-witnesses special? Comparing the influence of co-witness and interviewer misinformation on eyewitness reports.

Although some research suggests that misinformation provided by a co-witness could be more influential than that obtained from other sources, most of this research has compared the effect of co-witness information against non-social forms of misinformation only. To better understand the influence of co-witnesses we compared the influence of co-witness misinformation with the influence of misinformation provided by an interviewer. Across two experiments using the MORI paradigm we found no evidence that a co-witness is particularly influential relative to another social source of post-event misinformation. In fact, the source of the misinformation delivered by our interviewer was less likely to be correctly recalled than the source of the misinformation delivered by a co-witness. There was some evidence that misinformation delivered by both a co-witness and an interviewer has a stronger effect on witnesses' accuracy and confidence than misinformation obtained from either source alone. Finally, our results suggest that the opportunity to provide an early individual memory account might protect against the effect of subsequently-encountered co-witness misinformation. These results have important implications for the way that criminal investigations are conducted.

Addressing the negative effect of cross-examination questioning on children's accuracy: can we intervene?

This study investigated whether preinterview interventions could help to facilitate children's accuracy under cross-examination-style questioning. Five- and 6-year-olds (n = 77; mean [SD] age = 5.84 [0.48] years; 57% boys) and 9- and 10-year-olds (n = 87; mean [SD] age = 10.30 [0.54] years; 56% boys) took part in a staged event and were then interviewed with analogues of direct examination and cross-examination. In a pilot study, we ascertained that a brief verbal warning about the nature of cross-examination-given immediately prior to the cross-examination interview-did not influence children's cross-examination accuracy, regardless of whether it was delivered by an unfamiliar interviewer or the cross-examining interviewer. In the main experiment, some children participated in a brief intervention involving practice and feedback with cross-examination questions. Relative to control children, those who underwent this preparation intervention made fewer changes to their direct-examination responses under cross-examination, changed a smaller proportion of their correct responses, and obtained higher ultimate accuracy levels. These findings provide some support for the notion that pretrial interventions, if sufficiently comprehensive, could help children to maintain accuracy during cross-examination.

Misconceptions about childhood sexual abuse and child witnesses: Implications for psychological experts in the courtroom.

Recent changes to the law in New Zealand have led to a marked increase in experts being called to give evidence in cases of alleged child sexual abuse. Here we outline some of the common misconceptions that are held by expert witnesses in these cases and we review research on patterns of abuse disclosure and retraction, symptoms of abuse, external influences on children's reports, and experts' ability to distinguish true from false reports. We also consider what experts can say about memory that has relevance for these cases. We conclude that many long-held notions of child sexual abuse and children's testimony that make their way into our courtrooms are not supported by empirical research, raising questions about who is-and who is not-qualified to act as an expert witness.

The role of repeated interviewing in children's responses to cross-examination-style questioning.

The negative effect of cross-examination-style questioning on children's accuracy is likely to be due to the complex and credibility-challenging questions that characterize the interview. Given that cross-examination occurs after at least one prior interview, however, it is equally possible that repeated interviewing per se impairs children's accuracy, and that the questions asked have little bearing on children's responses. To examine this issue, 5- and 6-year-old children (n= 82) and 9- and 10-year-old children (n= 103) took part in a surprise event and were then interviewed using an analogue of direct examination. Either 1 week or 6 months later, half of the children were re-interviewed with an analogue of cross-examination designed to challenge their direct examination responses. Remaining children were re-interviewed with the same questions that were asked during direct examination. Children's accuracy decreased following their second interview, irrespective of age or delay; however, delay particularly impacted younger children's second interview performance. Children's accuracy was most impaired following a cross-examination-style interview. Overall, cross-examination-style questioning appears to be particularly detrimental to obtaining accurate event reports from children.

Exploring the effects of age and delay on children's person identifications: verbal descriptions, lineup performance, and the influence of wildcards.

We explored the effects of age and retention interval on several measures of children's person identification ability: verbal descriptions, lineup performance, and the success of a 'wildcard'--a photo of a silhouetted figure with a large question mark superimposed--in reducing children's tendency to choose from target-absent lineups. Children aged 5-7 years (N= 101) and 8-11 years (N= 109) were briefly exposed to an experimental confederate during a staged event. Either 1-2 days or 2 weeks later, children described the confederate and were then presented with either a target-present or -absent lineup. Within each group, approximately half of the children were presented with a wildcard and half were not. Target-present lineup performance improved as age increased. Compared to control children, children in the wildcard condition were more likely to correctly reject the target-absent lineup, and less likely to identify the innocent suspect. The wildcard did not influence children's target-present lineup accuracy, nor did delay exert an influence on any of our measures of lineup performance. These findings extend our knowledge of children's person identifications, as well as providing further support for the use of wildcards in photographic lineups.

Don't it make my brown eyes blue: co-witness misinformation about a target's appearance can impair target-absent line-up performance.

Misinformation from another witness has been shown to impair eyewitness reports, but little is known about how it may influence eyewitness identification. In Experiment 1, adult pairs comprising one participant and one experimental confederate viewed a video clip of a staged theft. Half of the participants were then misinformed by the confederate that the thief's accomplice had blue eyes (in fact, they were brown). Next, individual participants described the accomplice and completed a target-absent photographic line-up task comprising blue-eyed members. Misinformed participants were several times more likely than controls to describe the accomplice as having blue eyes, and twice as likely to identify someone from the line-up. In Experiment 2, when line-up members' eye colour was digitally altered from blue to brown, the line-up effect disappeared, suggesting that the increase in identifications in Experiment 1 was not a generalised increase in willingness to choose from the line-up. In Experiment 3, we discounted the possibility that discussion alone could account for the line-up misinformation effect, by subjecting all participants to co-witness discussion.