Novel lineup methods for improving the performance of older eyewitnesses

Previous research shows that older witnesses demonstrate poorer lineup performance compared to younger adults. Two experiments are presented which investigated the effectiveness of pre‐identification procedures aimed to reduce false identifications made by older adults. In experiment one older adults' demonstrated poorer lineup performance compared to younger adults. However, older adults benefited from pre‐lineup questions and a practice lineup prior to viewing a target absent (TA) lineup. In a second experiment, participants in the practice lineup condition made significantly fewer false identifications and more correct rejections on two TA lineups compared to participants in the control condition. On both target present (TP) lineups there was no significant difference in lineup performance between the two conditions. The effect of pre‐identification procedure on self‐reported lineup decision strategy and memory for non‐biased lineup instructions are discussed, as well as future research directions. Copyright © 2009 John Wiley & Sons, Ltd.     

The elimination‐plus lineup: Testing a modified lineup procedure with confidence

The present study examined whether a modified form of a preidentification confidence rating would provide evidence of a suspect's guilt in addition to the identification decision confidence. Participants (N  = 241) viewed a videotaped mock crime and were presented with a target‐present or target‐absent simultaneous, sequential, elimination, or elimination‐plus lineup procedure; both elimination procedures required 2 separate judgments from the witness (i.e., relative and absolute). The elimination‐plus procedure was identical to that of the elimination procedure with the addition of the confidence rating in between judgment 1 and judgment 2. Confidence after judgment 1, confidence after judgment 2, and the average of the 2 confidence ratings with the elimination‐plus procedure significantly predicted accuracy for choosers. Given that confidence has been recognised by the Supreme Court of the United States, these results shed light on a novel way of utilising confidence in the investigative process.     

The not‐sure response option in sequential lineup practice

Field implementation of double‐blind sequential lineups has prompted a question about the impact on eyewitness decisions of an explicit not‐sure response option. In this laboratory study, a video crime was viewed by 378 participants who then attempted to identify the culprit from a six‐person sequential or simultaneous‐format lineup that either included or did not include the culprit. Witnesses were provided either dichotomous forced‐choice (FC) response categories (yes/no) or a not‐sure option as one of three response categories (yes/no/not‐sure). The not‐sure option (NSO) significantly decreased witness choosing compared to the FC condition but only for sequential lineups. Both correct identifications and false alarms decreased. Diagnosticity was greatest for a sequential lineup with a NSO. The results suggest a criterion decision shift for witnesses who view a sequential lineup with a not‐sure response option. Copyright © 2010 John Wiley & Sons, Ltd.     

A simple technique for improving the quality of parameter estimates in learning hierarchy validation studies

Learning hierarchy research has been characterized by the use of ad hoc statistical procedures to determine the validity of postulated hierarchical connections. The two most substantial attempts to legitimize the procedure are due to White & Clark and Dayton & Macready, although both of these methods suffer from serious inadequacies. Data from a number of sources is analyzed using a restricted maximum likelihood estimation procedure and the results are compared with those obtained using the method suggested by Dayton and Macready. Improved estimates are evidenced by an increase in the computed value of the log likelihood function.     

The circle of life: A cross‐cultural comparison of children's attribution of life‐cycle traits

Do children attribute mortality and other life‐cycle traits to all minded beings? The present study examined whether culture influences young children's ability to conceptualize and differentiate human beings from supernatural beings (such as God) in terms of life‐cycle traits. Three‐to‐5‐year‐old Israeli and British children were questioned whether their mother, a friend, and God would be subject to various life‐cycle processes: Birth, death, ageing, existence/longevity, and parentage. Children did not anthropomorphize but differentiated among human and supernatural beings, attributing life‐cycle traits to humans, but not to God. Although 3‐year‐olds differentiated significantly among agents, 5‐year‐olds attributed correct life‐cycle traits more consistently than younger children. The results also indicated some cross‐cultural variation in these attributions. Implications for biological conceptual development are discussed.     

The effects of a target–stimulus reminder on performance in a novel object recognition task

The effects of original training-stimulus pre-test reminders were examined in a novel object recognition (NOR) task. NOR is a task that examines memory for complex stimuli, and is driven by the rats’ tendency to spend significantly more time exploring novel objects over those previously experienced. In this task, a delay is imposed between a training experience during which the animal is allowed to investigate a set of identical objects, and a later test exposure where the animal encounters one of the original objects and a novel object with which it has had no previous experience. Experiment 1 demonstrated that performance at 24 h is significantly worse than at an immediate delay (1 min). In the second experiment, it was demonstrated that neither a 10-s nor a 30-s reminder treatment, in the absence of training, resulted in a level of preference for novelty, a measure of memory for the original object, that was significantly greater than chance. Experiment 3 illustrated significant performance effects of a 30-s training stimulus reminder administered 15 min prior to test with a 24-h retention interval. The final experiment illustrated that the additional 30-s of object exposure is effective in enhancing performance only if it occurs shortly prior to test. Animals receiving the additional 30-s immediately following training did not experience such beneficial effects. It was concluded, based upon these results, that pre-test training-stimulus reminders in this task produce effects similar to those seen in more traditional tasks of learning and memory.     

Young children's beliefs about self‐disclosure of performance failure and success

Self‐disclosure of performance information involves the balancing of instrumental, learning benefits (e.g., obtaining help) against social costs (e.g., diminished reputation). Little is known about young children's beliefs about performance self‐disclosure. The present research investigates preschool‐ and early school‐age children's expectations of self‐disclosure in different contexts. In two experiments, 3‐ to 7‐year‐old children (total N = 252) heard vignettes about characters who succeeded or failed at solving a puzzle. Both experiments showed that children across all ages reasoned that people are more likely to self‐disclose positive than negative performances, and Experiment 2 showed that children across all ages reasoned that people are more likely to self‐disclose both positive and negative performances in a supportive than an unsupportive peer environment. Additionally, both experiments revealed changes with age – Younger children were less likely to expect people to withhold their performance information (of both failures and successes) than older children. These findings point to the preschool ages as a crucial beginning to children's developing recognition of people's reluctance to share performance information.     

Categorical effects in children's colour search: A cross‐linguistic comparison

In adults, visual search for a colour target is facilitated if the target and distractors fall in different colour categories (e.g. Daoutis, Pilling, & Davies, in press ). The present study explored category effects in children's colour search. The relationship between linguistic colour categories and perceptual categories was addressed by comparing native speakers of languages differing in the number of colour terms. Experiment 1 compared English and Kwanyama (Namibian) children aged 4 to 7 years on a visual search task, using target‐distractor pairs (blue‐green, blue‐purple, red‐pink) for which the Kwanyama did not have distinct names. The presence of a category advantage in the English, but not in the Kwanyama, suggested that linguistic boundaries may affect search performance. Experiment 2 examined visual search performance in the green‐yellow and the blue‐green region, in English and Himba (Namibian) 6‐year‐olds. The number of distractors was varied to assess search efficiency. Cross‐category search was more efficient than within‐category search in the English group, but this advantage was absent in the Himba. Increasing the number of distractors affected search speed in the English group, but not in the Himba. Overall, these findings suggest cross‐language differences in categorical effects on colour search, but also in the way the children performed the search. The nature of the category effect in search is discussed with respect to these findings.     

Co‐thought gestures in children's mental problem solving: Prevalence and effects on subsequent performance

Co‐thought gestures are understudied as compared to co‐speech gestures yet, may provide insight into cognitive functions of gestures that are independent of speech processes. A recent study with adults showed that co‐thought gesticulation occurred spontaneously during mental preparation of problem solving. Moreover, co‐thought gesturing (either spontaneous or instructed) during mental preparation was effective for subsequent solving of the Tower of Hanoi under conditions of high cognitive load (i.e., when visual working memory capacity was limited and when the task was more difficult). In this preregistered study ( https://osf.io/dreks/ ), we investigated whether co‐thought gestures would also spontaneously occur and would aid problem‐solving processes in children (N = 74; 8–12 years old) under high load conditions. Although children also spontaneously used co‐thought gestures during mental problem solving, this did not aid their subsequent performance when physically solving the problem. If these null results are on track, co‐thought gesture effects may be different in adults and children.     

Changes in 10‐year‐old children's body esteem: A time‐lag study between 2000 and 2010

This time‐lag study examined if there has been any changes in body esteem over a 10‐year period for 10‐year old children in Gothenburg, Sweden. Two cohorts of children, one in year 2000 and one in 2010, answered the same questionnaire about body esteem. A total of 960 children, 515 girls and 445 boys, participated in the first wave in 2000 and a total of 342 children, 171 girls and 171 boys participated in the second wave in 2010. The results showed a general stability in levels of body esteem for both girls and boys over the past 10 years. The gender differences, with boys being more satisfied with their appearance and weight compared to girls also seems to be stable over the years. In addition, the results also showed a somewhat positive development among the overweight girls with enhanced body esteem for the overweight girls compared to the non‐overweight girls during the ten years studied. Unfortunately, the same pattern was not found for overweight boys. For them the discrepancy in body esteem compared to non‐overweight boys, with the overweight boys being more dissatisfied, found in 2000 remained in 2010.     

The influence of a salience distinction between bilateral cues on the latency of target‐detection saccades

The spatial cueing paradigm, with saccades to targets as the method of response, was used to investigate the influence of two simultaneously presented cues on the orienting of visual attention. Participants were presented with bilateral cues, one of which was perceptually salient (high luminance) relative to the other. They participated in one of three conditions: in the ‘bright side likely’ condition targets usually (p = .8) appeared near the more salient cue; in the ‘dim side likely’ condition targets usually (p = .8) appeared near the less salient cue; and in the ‘neutral’ condition the arrangement of the cues was uninformative with respect to target location. Brief SOAs (0, 50, 100 and 150 ms) were employed. Rapid reflexive orienting to the more salient stimulus was observed in the neutral condition: saccadic latencies were faster when the target appeared near the bright cue, and this was found even across the two shortest SOAs. However, this reflexive orienting was suppressed in both the bright side likely and dim side likely conditions: the advantage observed at the bright cue's location across the two shortest SOAs in the neutral condition was significantly attenuated in the two contingent conditions. Results point to rapid expectancy‐based interference in the reflexive process of attention capture.     

The flexibility of source‐monitoring training: Reducing young children's source confusions

The effect of source‐monitoring training on the ability of 3‐ to 4‐year‐old children to discriminate between events seen live and those described in a story was examined. All children saw a live presentation of a target event and heard about a similar target event from a storybook. Three to 4 days later, the children received either source‐monitoring or control training involving a different set of events. Within each training condition, the children were taught to discriminate events (source training) or identify features of events (control training) acquired from sources that were either analogous (live–story events) or partially analogous (live—video events) to the target‐event sources. Immediately after training, all children were asked to monitor the source of the target events seen a few days earlier. The children in both the analogous and partially analogous source‐monitoring training groups more accurately distinguished between the target live and story events than did children in the control training groups. Copyright © 2009 John Wiley & Sons, Ltd.     

Throughput: A simple performance index with desirable characteristics

Throughput is a corrected response rate measure giving the number of successes per unit of discretionary time. It is a simple but general index applicable to psychomotor, behavioral, and cognitive tasks in which response times are measured. This measure has several attractive features: (1) It allows comparisons to be made across various tasks in which speed and accuracy are meaningful and measurable, independently of temporal differences in hardware, software, and procedures; (2) under conditions in which both speed and accuracy decline (or improve), throughput will be a more sensitive index of performance than either alone will be; and (3) in those tasks in which the speed—accuracy trade-off phenomenon operates, throughput will tend to be relatively less variable than either component alone will be. The measure allows both behavioral and information-processing interpretations of data and may be useful as a simple composite index, a measure of effectiveness or of cognitive consistency in studies investigating performance degradation or enhancement.     

The effects of pay level on organization‐based self‐esteem and performance: A field study

Most compensation managers implicitly assume (or perhaps hope) that high pay levels will maintain and enhance future performance. To date, this assumption has been largely untested. Given the importance of pay level and the large expense that pay represents to most organizations, understanding how and why pay level influences the behaviour of employees in organizations is an important question. The purpose of this study is to examine the motivational effects of pay level on employee performance. To examine these issues, we collected field study data from a variety of sources, at three different times, and assessed the effects of employee pay level on subsequent self‐esteem and performance. Specifically, we hypothesized that the effects of pay level on performance would be mediated by pay level effects on organization‐based self‐esteem. We base this hypothesis on the premise that level of pay within an organization communicates a sense of how much the organization values an employee and thus affects employee organization‐based self‐esteem which, in turn, enhances job performance. After controlling for organization tenure, and previous pay change, results supported a mediated model that suggests that pay level affects employee self‐esteem, which in turn, affects employee performance.     

STAR: A unique embedded performance assessment technique

STAR (The Strategic and Tactical Assessment Record) is a versatile research tool designed to evaluate the effects of sustained performance and other stressors on integrated, complex cognitive functioning. This completely automated task is presented in the form of a highly motivating computer game. However, unlike typical computer games, successful performance of STAR depends on an individual’s ability to rapidly and accurately assess risk/benefit ratios in a variety of situations, and on the skilled use of an array of multipurpose control systems. STAR is unique in that approximately 80 performance measures are unobtrusively embedded in the operations required to “play the game”; no obvious performance assessment interferes with task presentation. STAR provides multiple measures of psychomotor function, attention, memory, information processing, decision making, risk-taking behavior, subjective state, errors, and error paths. In this report, we describe STAR, and summarize two preliminary experiments designed to separately evaluate the effects of task difficulty and task stress level on complex performance.