Polarity correspondence: A general principle for performance of speeded binary classification tasks

Differences in performance with various stimulus-response mappings are among the most prevalent findings for binary choice reaction tasks. The authors show that perceptual or conceptual similarity is not necessary to obtain mapping effects; a type of structural similarity is sufficient. Specifically, stimulus and response alternatives are coded as positive and negative polarity along several dimensions, and polarity correspondence is sufficient to produce mapping effects. The authors make the case for this polarity correspondence principle using the literature on word-picture verification and then provide evidence that polarity correspondence is a determinant of mapping effects in orthogonal stimulus-response compatibility, numerical judgment, and implicit association tasks. The authors conclude by discussing implications of this principle for interpretation of results from binary choice tasks and future model development.     

Acceptance of Labels for Behavioral Response-Reduction Procedures and the Users of Those Procedures

The Psychological Record - The acceptability of labels for behavioral response-reduction procedures and the users of those procedures was evaluated. Introductory psychology students read a lesson...     

Processing of geometrical dimensions in a binary classification task: Evidence for a dual process model

Confirming the findings in search tasks with letters and digits, the typical RT_same < RT_diff result was obtained in a matching paradigm requiring the classification of geometrical stimuli that were given in pairs. The study supports a dual process model that is based on an identity reporter for the faster “same” response and a difference detector for the slower “different” responses, both operating with equal accuracy. Subjects appeared to perceive outline aspects of figures, formed by size and form, holistically. An internal characteristic, such as an interior line, was apparently processed as a separate attribute. However, the outlines of the stimulus configurations appeared to be much more salient and interfered with the judgment of the orientation of the interior line. Moreover, the latter stimulus aspect could be easily ignored as the task required.     

The development and classification accuracy of the life assessment questionnaire in the detection of pain-related malingering

This paper describes three phases of the development and validation of the Life Assessment Questionnaire (LAQ), a multi-scale inventory for assessing potential malingering in adults reporting chronic pain. Study 1 involved scale construction and item analysis. Discriminant validity was investigated in Study 2 by comparing scores for the clinical reference group with participants instructed to simulate chronic pain. Study 3 examined the convergent validity of the LAQ with the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) and Behavioral Assessment of Pain (BAP). Results revealed that the simulation groups scored significantly higher than the clinical reference group across all scales. Receiver operating characteristic analysis revealed sensitivity and specificity scores ranging from 0.44 to 0.57 and 0.88 to 0.93, respectively. Positive predictive power values ranged between 0.79 and 0.88. Strong convergent validity was found for the LAQ. These studies demonstrated the effectiveness of the LAQ in classifying individuals who feign pain complaints, supporting the utility of the LAQ for reaching conclusions about the presence of malingering. Copyright ? 2012 John Wiley & Sons, Ltd.     

The classification accuracy of the Minnesota Multiphasic Personality Inventory-Adolescent: effects of modifying the normative sample

Numerous studies have reported that the Minnesota Multiphasic Personality Inventory-Adolescent (MMPI-A) produces a high frequency of within-normal-limits basic scale profiles for adolescents with significant clinical pathology (e.g., Archer, 2005). The current study builds on the observation that the MMPI-A normative sample included participants who reported a recent history of referral for counseling or therapy services. The 193 adolescents who reported referral for counseling were removed from the normative sample and uniform T-score values were recalculated for basic clinical scale raw scores. The frequency of within-normal-limits profiles was only marginally reduced by using the revised MMPI-A norms. Furthermore, the overall hit rate, positive predictive power, and sensitivity were only slightly improved by removing normative participants referred for counseling and basing norms on the remaining 1,427 adolescents.     

Haste does not always make waste: Expertise,direction of attention,and speed versus accuracy in performing sensorimotor skills

In two experiments, we examined the attentional mechanisms governing sensorimotor skill execution across levels of expertise. In Experiment 1, novice and expert golfers took a series of putts under dual-task conditions designed to distract attention from putting and under skill-focused conditions that prompted attention to step-by-stePperformance. Novices performed better under skill-focused than under dual-task conditions. Experts showed the opposite pattern. In Experiment 2, novice and expert golfers putted under instructions that emphasized either putting accuracy or speed—the latter intended to reduce the time available to monitor and explicitly adjust execution parameters. Novices putted better under accuracy instructions. Experts were more accurate under speed instructions. In agreement with theories of skill acquisition and automaticity, novice performance is enhanced by conditions that allow for on-line attentional monitoring (e.g., skill-focused or accuracy instructions) in comparison with conditions that prevent explicit attentional control of skill execution (e.g., dual-task or speed constraints). In contrast, the proceduralized skill of experts benefits from environments that limit, rather than encourage, attention to execution.     

WAIS digit span-based indicators of malingered neurocognitive dysfunction: classification accuracy in traumatic brain injury

The present study determined specificity and sensitivity to malingered neurocognitive dysfunction (MND) in traumatic brain injury (TBI) for several Wechsler Adult Intelligence Scale (WAIS) Digit Span scores. TBI patients (n = 344) were categorized into one of five groups: no incentive, incentive only, suspect, probable MND, and definite MND. Performance of 1,063 nonincentive patients (e.g., cerebrovascular accident, memory disorder) was also examined. Digit Span scores included reliable digit span, maximum span forward both trials correct, maximum span forward, combined maximum forward and backward span, Digit Span scaled score, maximum span backward both trials correct, and maximum span backward. In TBI, sensitivity to MND ranged from 15% to greater than 30% at specificities of 92% to 98%. Patient groups with documented brain pathology had higher false-positive error rates. These results replicate previous known-groups malingering studies and provide valuable data supporting the WAIS Digit Span scores in detection and diagnosis of malingering.     

Active Reading Procedures for Moderating the Effects of Poor Highlighting

We investigated two active reading techniques intended to eliminate the negative effect on reading comprehension of preexisting, inappropriate highlighting. College students read passages in three highlighting conditions: no highlighting, appropriate highlighting, and inappropriate highlighting. In Experiment 1, 30 students read the passages while using a finger as if it were a highlighter. In Experiment 2, another 30 students used blue highlighters while reading the passages. The results showed that both using a finger as a highlighter and using a blue highlighter eliminated previously documented negative effects of preexisting, inappropriate highlighting. Further, metacomprehension was poor in the presence of inappropriate highlighting.     

Optogenetic tools for analyzing the neural circuits of behavior

In order to understand how the brain generates behaviors, it is important to be able to determine how neural circuits work together to perform computations. Because neural circuits are made of a great diversity of cell types, it is critical to be able to analyze how these different kinds of cell work together. In recent years, a toolbox of fully genetically encoded molecules has emerged that, when expressed in specific neurons, enables the electrical activity of the targeted neurons to be controlled in a temporally precise fashion by pulses of light. We describe this optogenetic toolbox, how it can be used to analyze neural circuits in the brain and how optogenetics is impacting the study of cognition.     

分类精确性指数Entropy在潜剖面分析中的表现:一项蒙特卡罗模拟研究

本研究通过蒙特卡洛模拟考查了分类精确性指数Entropy及其变式受样本量、潜类别数目、类别距离和指标个数及其组合的影响情况。研究结果表明:(1)尽管Entropy值与分类精确性高相关,但其值随类别数、样本量和指标数的变化而变化,很难确定唯一的临界值;(2)其他条件不变的情况下,样本量越大,Entropy的值越小,分类精确性越差;(3)类别距离对分类精确性的影响具有跨样本量和跨类别数的一致性;(4)小样本(N=50~100)的情况下,指标数越多,Entropy的结果越好;(5)在各种条件下Entropy对分类错误率比其它变式更灵敏。     

On the Modification of Clinical Procedures

All sciences depend for their progress on the modification of existing procedures and the clinical sciences arc no exception. The question is raised whether the restriction of modifications of clinical procedures, even though legally defensible, is socially and scientifically helpful.     

Applicant Reactions to Multiple Selection Procedures for the Police Force

Cette étude de terrain portant sur des candidats voulant entrer dans la police a fait appel à la théorie de Gilliland (1993) concernant la pertinence de la justice organisationnelle. La recherche a tenté d’analyser: a) la perception que les candidats avaient de trois procédures de sélection (tests de souplesse corporelle, tests psychologiques et entretien); b) si la perception des tests de souplesse corporelle variait avec le sexe; c) si les réactions aux procédures de sélections susmentionnées avaient une influence significative sur l’attirance exercée par l’organisation, l’intention d’accepter le poste et la perception de l’équité. Les candidats ont été contactés trois fois: à la présélection (1° période); après les tests psychologiques, l’épreuve d’agilité physique et l’entretien (2° période); et à la fin de la procédure de sélection (3° période). Il apparut que les candidats réagissaient plus favorablement aux entretiens et aux tests de souplesse corporelle qu’aux tests psychologiques. Les femmes tendaient à moins voir que les hommes un rapport entre les tests d’agilité physique et le travail. Les réactions des candidats vis‐à‐vis des tests psychologiques et des entretiens étaient le plus souvent sans lien avec l’attirance, les intentions et la perception de l’équité. Les réactions envers les tests d’agilité physique influençaient le désir de rejoindre les forces de police, mais pas le sexe. La perception du caractère (in)juste du résultat de la sélection était surtout sous la dépendance des a priori concernant l’utilisation des tests psychologiques et des entretiens dans la sélection. On examine les retombées de ces résultats sur la pratique et les recherches à venir. This field study of applicants seeking to join the police force used Gilliland's (1993 ) adaptation of organisational justice theory to frame the study. The study sought to examine (a) applicant perceptions of three selection procedures: physical agility tests, psychological tests, and interviews; (b) whether females and males had different perceptions of physical agility tests; and (c) if reactions to the aforementioned selection procedures had a significant influence on organisational attractiveness, job acceptance intentions, and fairness perceptions. Applicants were surveyed at three time points: pre‐selection (Time 1); after psychological testing, physical agility testing, and interview (Time 2); and after the completion of selection procedures (Time 3). The findings showed applicants reacted most positively to interviews and physical agility tests and less favorably to psychological tests. Compared to males, females were less likely to perceive physical agility tests as job related. Applicant reactions to psychological tests and interviews were mostly unrelated to attraction‐intentions and fairness perceptions. Reactions to physical agility tests influenced desire to join the police force; gender did not influence intention to join the police force. Perceptions of selection outcome fairness were mostly influenced by initial beliefs about the use of psychological tests and interviews for selection purposes. Practical and future research applications of the findings are discussed.     

Increasing the Generativity of Identity-Based Procedures for Establishing Arbitrary Conditional Relations

The Psychological Record - Previous studies have shown that conditional discrimination training procedures involving identity matching to complex samples can produce emergent arbitrary relations....     

Malingering in toxic exposure: classification accuracy of reliable digit span and WAIS-III Digit Span scaled scores

This study examined the sensitivity and false-positive error rate of reliable digit span (RDS) and the WAIS-III Digit Span (DS) scaled score in persons alleging toxic exposure and determined whether error rates differed from published rates in traumatic brain injury (TBI) and chronic pain (CP). Data were obtained from the files of 123 persons referred for neuropsychological evaluation related to alleged exposure to environmental and industrial substances. Malingering status was determined using the criteria of Slick, Sherman, and Iverson (1999). The sensitivity and specificity of RDS and DS in toxic exposure are consistent with those observed in TBI and CP. These findings support the use of these malingering indicators in cases of alleged toxic exposure and suggest that the classification accuracy data of indicators derived from studies of TBI patients may also be validly applied to cases of alleged toxic exposure.     

Diagnostic efficiency of several methods of identifying socially rejected children and effect of participation rate on classification accuracy

Social rejection is associated with a wide variety of negative outcomes. Early identification of social rejection and intervention to minimize its negative impact is thus important. However, sociometric methods, which are considered high in validity for identifying socially rejected children, are frequently not used because of (a) procedural challenges, (b) community apprehension, and (c) sensitivity to missing data. In a sample of 316 students in grades K through 8, we used receiver operating characteristics (ROC) analyses to compare the diagnostic efficiency of several methods for identifying socially rejected children. When not using least-liked nominations, (a) most-liked nominations yielded the greatest diagnostic efficiency (AUC = .96), (b) peer ratings were more efficient (AUC = .84 to .99) than teacher ratings (AUC = .74 to .81), and (c) teacher report of social status was more efficient (AUC = .81) than scores from teacher behavior rating scales (AUC = .74 to .75). We also examined the effects of nominator non-participation on diagnostic efficiency. At participation as low as 50%, classification of sociometric rejection (i.e., being rejected or not rejected) was quite accurate (κ = .63 to .77). In contrast, at participation as high as 70%, classification of sociometric status (i.e., popular, average, unclassified, neglected, controversial, or rejected) was significantly less accurate (κ = .50 to .59).