Empirical validation of a procedure to correct position and stimulus biases in matching-to-sample

The development of position and stimulus biases often occurs during initial training on matching-to-sample tasks. Furthermore, without intervention, these biases can be maintained via intermittent reinforcement provided by matching-to-sample contingencies. The present study evaluated the effectiveness of a correction procedure designed to eliminate both position and stimulus biases. Following key-peck training, a group of 6 pigeons had extended exposure to matching-to-sample contingencies without a correction procedure, a group of 4 pigeons was briefly exposed to a simultaneous matching-to-sample procedure to assess biases prior to exposure to the correction procedure, and a group of 5 pigeons was exposed directly to the correction procedure. The correction procedure arranged that every time an incorrect match was made, the trial configuration was repeated on the subsequent trial until a correct match was made. Extended exposure to matching-to-sample contingencies without a correction procedure was associated with reduced biases eventually for most subjects, but rapid development of near-perfect accuracy and bias-free performance was observed upon the implementation of the correction procedure regardless of the type of bias. Bias-free performance was maintained following subsequent exposure to a zero-delay MTS procedure.     

The confidence-accuracy relationship in eyewitness identification: effects of lineup instructions, foil similarity, and target-absent base rates

Discriminating accurate from mistaken eyewitness identifications is a major issue facing criminal justice systems. This study examined whether eyewitness confidence assists such decisions under a variety of conditions using a confidence-accuracy (CA) calibration approach. Participants (N = 1,200) viewed a simulated crime and attempted 2 separate identifications from 8-person target-present or target-absent lineups. Confidence and accuracy were calibrated for choosers (but not nonchoosers) for both targets under all conditions. Lower overconfidence was associated with higher diagnosticity, lower target-absent base rates, and shorter identification latencies. Although researchers agree that courtroom expressions of confidence are uninformative, our findings indicate that confidence assessments obtained immediately after a positive identification can provide a useful guide for investigators about the likely accuracy of an identification.     

The influence of face age on identification from a video line-up: A comparison between older and younger adults

A group of young-adult (aged 18–35 years) and older-adult witnesses (aged 61–83 years) viewed films of two similar staged thefts, one that depicted a young culprit and the other an older culprit. After a short delay of 40–60 minutes participants were presented with two separate video line-ups, one for each target. In one line-up the target was present (TP) and the other the target was absent (TA). Older adults performed more poorly in target present and absent line-ups, and showed no own-age bias, however young adults showed an own age advantage for the TA line-ups.     

Reinforcer control by comparison-stimulus color and location in a delayed matching-to-sample task

Six pigeons were trained in a delayed matching-to-sample task involving bright- and dim-yellow samples on a central key, a five-peck response requirement to either sample, a constant 1.5-s delay, and the presentation of comparison stimuli composed of red on the left key and green on the right key or vice versa. Green-key responses were occasionally reinforced following the dimmer-yellow sample, and red-key responses were occasionally reinforced following the brighter-yellow sample. Reinforcer delivery was controlled such that the distribution of reinforcers across both comparison-stimulus color and comparison-stimulus location could be varied systematically and independently across conditions. Matching accuracy was high throughout. The ratio of left to right side-key responses increased as the ratio of left to right reinforcers increased, the ratio of red to green responses increased as the ratio of red to green reinforcers increased, and there was no interaction between these variables. However, side-key biases were more sensitive to the distribution of reinforcers across key location than were comparison-color biases to the distribution of reinforcers across key color. An extension of Davison and Tustin's (1978) model of DMTS performance fit the data well, but the results were also consistent with an alternative theory of conditional discrimination performance (Jones, 2003) that calls for a conceptually distinct quantitative model.     

Eyewitness identification in simultaneous and sequential lineups: an investigation of position effects using receiver operating characteristics

For decades, sequential lineups have been considered superior to simultaneous lineups in the context of eyewitness identification. However, most of the research leading to this conclusion was based on the analysis of diagnosticity ratios that do not control for the respondent’s response criterion. Recent research based on the analysis of ROC curves has found either equal discriminability for sequential and simultaneous lineups, or higher discriminability for simultaneous lineups. Some evidence for potential position effects and for criterion shifts in sequential lineups has also been reported. Using ROC curve analysis, we investigated the effects of the suspect’s position on discriminability and response criteria in both simultaneous and sequential lineups. We found that sequential lineups suffered from an unwanted position effect. Respondents employed a strict criterion for the earliest lineup positions, and shifted to a more liberal criterion for later positions. No position effects and no criterion shifts were observed in simultaneous lineups. This result suggests that sequential lineups are not superior to simultaneous lineups, and may give rise to unwanted position effects that have to be considered when conducting police lineups.     

A study of retrieval processes in action memory for school-aged children: the impact of recall period and difficulty on action memory

ABSTRACT

Research in action memory for adults has shown that enacted encoding is not only retrieved more frequently but is also faster in comparison to verbal encoding. The aim of this study was to investigate retrieval processes in terms of recall period and recall difficulty for different encoding conditions in school-aged children (8-, 10-, 12-, 14-years old). The participants studied verbal tasks, subject-performed tasks and experimenter-performed tasks, and received immediate and final free-recall tests. The results revealed that older children not only outperformed younger children in terms of accuracy but also outpaced them in all recall periods. Moreover, recalls of subject-performed tasks and experimenter-performed tasks were better and faster compared with verbal encoding on both types of recall test, by increasing throughout the recall periods. These results are discussed in terms of memory strategies and information processing methods. Pedagogic implications for the use of action memory in children's learning are also considered.     

The Semantic Drift of Quotations in Blogspace: A Case Study in Short‐Term Cultural Evolution

We present an empirical case study that connects psycholinguistics with the field of cultural evolution, in order to test for the existence of cultural attractors in the evolution of quotations. Such attractors have been proposed as a useful concept for understanding cultural evolution in relation with individual cognition, but their existence has been hard to test. We focus on the transformation of quotations when they are copied from blog to blog or media website: by coding words with a number of well‐studied lexical features, we show that the way words are substituted in quotations is consistent (a) with the hypothesis of cultural attractors and (b) with known effects of the word features. In particular, words known to be harder to recall in lists have a higher tendency to be substituted, and words easier to recall are produced instead. Our results support the hypothesis that cultural attractors can result from the combination of individual cognitive biases in the interpretation and reproduction of representations.     

A Witness Breaks His Silence: The Meaning of a Therapist's Response to an Adolescent's Self-Destruction

I describe the case of a self-mutilating adolescent girl and my dilemma, as her therapist, about telling her parents about her self-abuse. I use two complementary, mutually enhancing relational theories of trauma—Ferenczi's (1933) and Davies and Frawley's (1994)—to help understand the minefield I was in. Davies and Frawley describe certain relational configurations that are typical of trauma victims. I believe that it is not only unavoidable but therapeutically vital for therapists to participate in these configurations so they can know the patient's experience in a personal way. It is also crucial that they be witnesses who provide recognition for the patient's pain and, in so doing, relieve the intolerable feeling of isolation that Ferenczi proposed was the most basic trauma. In addition, I discuss the observation that some people who have not been previously traumatized in any gross way manifest characteristics of trauma.     

The savings problem in the original position: assessing and revising a model

Abstract

The common conception of justice as reciprocity seemingly is inapplicable to relations between non-overlapping generations. This is a challenge also to John Rawls’s theory of justice as fairness. This text responds to this by way of reinterpreting and developing Rawls’s theory. First, by examining the original position as a model, some revisions of it are shown to be wanting. Second, by drawing on the methodology of constructivism, an alternative solution is proposed: an amendment to the primary goods named ‘sustainability of values’. This revised original position lends support to intergenerational justice as fairness.     

A calibration explanation of serial position effects in evaluative judgments

Judges often evaluate stimulus series on dimensions for which no physical scale exists; for example, when judging academic ability in oral examinations. We propose that judges deal with this problem by calibrating an internal judgment scale that maps stimulus input onto available judgment categories. This calibration process implies serial position effects: Judges should initially avoid extreme categories, because using extreme categories reduces judgmental degrees of freedom, thereby increasing the possibility of internal consistency violations. In four experiments, we show that judgments become indeed more extreme later in a series of judgments. Judges evaluated the same good (poor) performances more positive (negative) at the end of a sequence compared to the beginning. Judges’ expertise did not prevent the effect, but allowing end-of-sequence judgments reduced serial position effects. We discuss the implications and possible remedies of these calibration effects on judgment extremity.     

双向偏见引发冲突情境下自我归类对民族社会化觉察的影响——来自景颇族、傣族和汉族初中生的证据

采用情境实验法和故事补全任务,考察双向偏见引发冲突情境下的自我归类对景颇族、傣族与汉族初中生的民族社会化觉察的影响。结果表明,作为冲突事件的当事者,景颇族学生和傣族学生觉察到的促进和睦、文化社会化及促使不信任等民族社会化信息存在差异;景颇族、傣族和汉族学生的自我归类存在差异;自我归类对促进和睦、文化社会化与报告权威等信息的觉察的影响亦存在民族差异。在双向偏见冲突情境下,三族学生的自我归类与民族社会化觉察有一定关系:无论是做当事者/内群体归类、旁观者/外群体归类,还是做调解者/群际归类,被试对促进和睦的觉察均最多。偏见准备主要与当事者归类有关,而进行调解者归类的被试更容易觉察到"报告权威"。     

Target position and practice in the identification of letters in varying contexts: A word superiority effect

A forced-choice detection paradigm controlling for postperceptual inference was used to investigate letter identification in three-position displays. Letters from a predesignated set of four targets appeared singly, in strings of noise characters, in unpronounceable nonsense strings, and in words. Subjects knew which context would occur, but did not know which of the three display positions would contain the target. Correct detection data were collected at constant exposure duration over five testing sessions. Overall identification accuracy was higher in words than in all other contexts, the first word superiority effect to be found with targets specified in advance since Reicher’s (1969). This effect remained constant over sessions. An interaction between context type and target position showed enhanced accuracy for initial and terminal letters in words, but depressed accuracy at initial and terminal positions in other contexts. This was interpreted to mean that prior knowledge of context is used to alter the dynamics of perceptual analysis.     

Using optical illusions in the shoulder of a cycle path to affect lateral position

An important factor in single-sided accidents of older cyclists is that they ride off the cycle path onto the verge. Two experiments were performed to assess the feasibility of using virtual 3D objects in the verge to affect the lateral position of bicyclists. In the first experiment, different virtual objects were placed in the shoulder and 1150 passing bicyclists were observed using a fixed camera. The (standard deviation of the) lateral position and speed in four conditions with virtual objects differing in colour, structure, or 3D effect were compared with a control condition in which no virtual objects were applied. In a second experiment, the behaviour of 32 bicyclists aged 50 years or older was measured by mounting two digital action cameras with GPS on the participants’ bicycles. The participants cycled a route of approximately 12 km in which several locations were passed, one of these contained 15 virtual objects similar to the ones used in the first experiment placed in the shoulder of the cycle path. Cyclist behaviour was compared with behaviour at a control location consisting of a solitary two-way cycle path with a grass shoulder. Results indicate that the virtual objects in the tested format had little overall effect on cyclists’ behaviour. However, bicyclists were positioned closer to the virtual objects and the shoulder when they looked at the objects or when they reported that they saw them while cycling. This suggests that the overall visibility of the object design may have been too conservative.     

Conceptual similarity effects on working memory in sentence contexts: Testing a theory of anaphora

The degree of semantic similarity between an anaphoric noun phrase (e.g., the bird) and its antecedent (e.g., a robin) is known to affect the anaphor resolution process, but the mechanisms that underlie this effect are not known. One proposal (Almor, 1999) is that semantic similarity triggers interference effects in working memory and makes two crucial assumptions: First, semantic similarity impairs working memory just as phonological similarity does (e.g., Baddeley, 1992), and, second, this impairment interferes with processes of sentence comprehension. We tested these assumptions in two experiments that compared recall accuracy between phonologically similar, semantically similar, and control words in sentence contexts. Our results do not provide support for Almor's claims: Phonological overlap decreased recall accuracy in sentence contexts, but semantic similarity did not. These results shed doubt on the idea that semantic interference in working memory is an underlying mechanism in anaphor resolution.     

Identification and location tasks rely on different mental processes: a diffusion model account of validity effects in spatial cueing paradigms with emotional stimuli

Spatial cueing paradigms are popular tools to assess human attention to emotional stimuli, but different variants of these paradigms differ in what participants’ primary task is. In one variant, participants indicate the location of the target (location task), whereas in the other they indicate the shape of the target (identification task). In the present paper we test the idea that although these two variants produce seemingly comparable cue validity effects on response times, they rest on different underlying processes. Across four studies (total N?=?397; two in the supplement) using both variants and manipulating the motivational relevance of cue content, diffusion model analyses revealed that cue validity effects in location tasks are primarily driven by response biases, whereas the same effect rests on delay due to attention to the cue in identification tasks. Based on this, we predict and empirically support that a symmetrical distribution of valid and invalid cues would reduce cue validity effects in location tasks to a greater extent than in identification tasks. Across all variants of the task, we fail to replicate the effect of greater cue validity effects for arousing (vs. neutral) stimuli. We discuss the implications of these findings for best practice in spatial cueing research.     

Modification of Hostile Interpretation Bias in Depression: A Randomized Controlled Trial

Interpretation Bias Modification (IBM) is gaining attention in the literature as an intervention that alters cognitive biases and reduces associated symptoms. Forty, primarily college-aged, non-treatment-seeking adults with major depressive disorder (MDD) were randomly assigned to receive either IBM targeting hostile interpretation bias (IBM-H) or a healthy video control (HVC) condition. Compared to those in HVC, participants in IBM-H reported more benign interpretations and fewer hostile interpretations at posttreatment. No difference in depressive interpretation bias was found between groups at posttreatment. IBM-H led to improved anger control at posttreatment and follow-up compared to HVC, though no effects of condition were found on trait anger or depressive symptoms. The IBM-H group perceived their treatment as less credible than the HVC group. For individuals with high expectancy of treatment success, IBM-H led to lower posttreatment depressive symptoms compared to HVC, while findings trended in the opposite direction for those with low expectancy of success. Overall, these preliminary findings point to boundary conditions for the efficacy of IBM protocols for anger and depression and potential improvements to be made to future IBM protocols.     

Behavioural coherence in group robbery: a circumplex model of offender and victim interactions

The behaviour of offenders and victims in 116 cases of group robbery (61 commercial, 55 personal) was examined. Four interpersonal themes were evident: dominance, submission, co‐operation and hostility. These themes are governed by the principles of complementarity such that offender dominance elicits victim submission (reciprocity) and vice versa, while co‐operative offenders tend to elicit victim co‐operation (correspondence). Hostile offences were hypothesised as eliciting hostility in victims, but few victims in the sample demonstrated active resistance. The existence of behavioural themes suggests that offenders within the same group behave in a homogenous fashion, which is explained by reference to group norms and processes of modelling. Further, differences in interpersonal themes were evident between commercial and personal robberies. Commercial robberies tend to involve greater levels of co‐operation than personal robberies, while personal robberies involve more hostility than commercial robberies. This is discussed in terms of situational and motivational elements of the robberies. Aggr. Behav. 32:330–342, 2006. © 2006 Wiley‐Liss, Inc.     

Predictors of Participation in Performance Appraisal: A Voluntary System in a Blue-Collar Work Environment

Organisations have long acknowledged the value of performance appraisal in both administration decisions and in motivating employees. However, it would appear that most empirical research has focused on compulsory systems designed for use with executives and managers (Bannister and Balkin 1990; Ilgen, Fisher and Taylor 1979; Klein 1989). The reluctance to implement appraisal systems with lower level and base-grade employees may be due to several factors, including employee and union resistance to compulsory systems of appraisal (Nankervis 1990). Faced with this problem, appraisal can be viewed by appraisees and appraisers as an `innovation'. In a climate with growing emphasis on participative management styles, self-regulated or voluntary systems of performance appraisal may become increasingly prevalent and important. Thus, 476 base-grade (shop floor) employees of an Australian government business enterprise completed a survey regarding issues such as attitude to performance appraisal, source credibility, system satisfaction, anticipated feedback, perceived consequences of participation and intention to enter the system. Roger's (1983) innovation-decision model was utilised in the structure and analysis of the data and provided useful insights regarding the factors which are related to participation in a voluntary system of performance appraisal. Findings indicated that attitude towards, and support of, performance appraisal in general, perception of consequences of performance appraisal, satisfaction with the supervisor, anticipated feedback, and awareness and knowledge of the system in place in the organisation, were important in predicting the decision to adopt or reject the performance appraisal scheme.     

Pre-trial therapy for child witnesses in cases of sexual abuse: A scoping literature review

Globally, child complainants of sexual abuse are expected to testify in criminal proceedings and in some countries therapy is delayed until after the child testifies as not to contaminate the child’s version of events. We carried out a scoping review of the literature on the provision of pre-trial therapy to child witnesses in cases of sexual abuse, to identity pertinent practice issues. We searched the following data bases: Academic FileOne, CINAHL, Cochrane Library, eBook (EBSCOHost); HeinOnline, OAPEN Library, PscyhARTICLS, PscyhINFO; SocINDEX, ScienceDirect, Google Scholar, and Scopus. We identified white and grey literature for the period spanning 1980 to 2016. Inclusion criteria included studies published in English, experimental studies, literature reviews, and policy documents relating to the provision of pre-trial therapy for child witnesses in criminal cases of sexual abuse. We discovered that an internationally accepted clear definition of pre-trial therapy is needed to ensure a common understanding thereof amongst all role players. A dearth of empirical studies exists and consequently the possible impact of different forms of therapeutic approaches on the child witness’ testimony is yet to be conclusively determined. In the interim, therapists and other role players should be acutely aware of the impact of different forms of therapy on the child witness’s testimony.