Using ROC curves to test models of recognition memory: The relationship between presentation duration and slope

Many theories of memory predict that the slope of the z-transformed receiver-operating characteristic (ROC) curve should decrease with increases in the memory strength of old items. While several prior studies have failed to demonstrate this effect, the results of two experiments demonstrate that increasing presentation duration can reduce the slope of the z-transformed ROC curve. These results raise questions about the generality of prior results and of dual-process theories designed to accommodate those results. We close by emphasizing that determining the experimental circumstances that affect whether or not the slope of the z-transformed ROC curve decreases will provide important constraints on theories of recognition memory.     

On the shape of energy-detection ROC curves

A numerical study shows that energy-detection ROC curves based on chi-squared distributions may be accurately represented by binormal receiver operating characteristic (ROC) curves. This allows the detector accuracy and the ROC shape (asymmetry) to be expressed simply in terms of the distribution parameters. An established approximate formula for the shape of energy-detection ROC curves is shown to be inaccurate. An improved approximately is presented.     

Optimal response biases and the slope of ROC curves as a function of signal intensity,signal probability,and relative payoff

Rats performed in a two-lever analogue of the yes-no psychophysical procedure. The signal consisted of of an increment in the intensity of a random noise. Correct responses were reinforced with single bursts of brain stimulation; incorrect responses produced brief periods of time-out. Receiver-operating-characteristic curves were generated at each of several signal intensities by varying either the signal probability (0.1–0.9) or the relative number of brain stimulations for correct responses (1:3–3:1). The index d’ (or d’_e) increased with the signal intensity and was independent of response bias. When the signal probability was varied, the animals optimized the number of correct trials. and hence the number of brain stimulations obtained at each level of detection. They approximated this optimum more closely as the signal intensity was reduced. When the ratio of brain stimulations was varied, the animals compromised between optimizing the number of correct trials and optimizing the number of brain stimulations obtained. The slopes of the ROC curves plotted on normal-normal coordinates frequently departed from unity, but did not change systematically with either the signal intensity or the method by which they were generated.     

Factors affecting responses to Likert type questionnaires: introduction of the ImpExp,a new comprehensive model

The major purpose of this paper is to propose a comprehensive model describing the effects of response sets within the theory framework of the stages of responding to questionnaires, and taking into account the effects of collectivist and individualist attributes within cross-cultural contexts. The introduction of this model aims to provide a construct that may help minimize biases in questionnaire-based research as well as providing new directions for theoretical and empirical research in the field of response sets.

Children's event reports: Factors affecting responses to repeated questions in vignette scenarios and event recall interviews

When adults repeat questions, children often give inconsistent answers. This study aimed to test the claim that these inconsistencies occur because children infer that their first answer was unsatisfactory, and that the adult expects them to change their answer. Children aged 4, 6, and 8 years (N= 134) were asked about vignettes in which an adult repeated a question, with manipulation of the adult's overt dissatisfaction (high vs. low pressure) and knowledge about the information sought. On a separate occasion, the children were given an unrelated event recall interview containing repeated questions. All age groups showed sensitivity to adult dissatisfaction, interpreting question repetition as an implicit request for answer change more frequently in the high than in the low‐pressure vignettes. Overall, however, these ‘change‐expected’ interpretations were least frequent in the younger children, who were the most prone to shifting. Also there was no evidence that these interpretations were associated with more frequent shifting in the recall interview. The results do not provide clear support for a simple conversational inference account of shifting, especially in younger children.     

A comparison of binary and rating techniques in the signal detection analysis of recognition memory

Forty-eight subjects were run on a recognition memory task employing low, medium, or high meaningfulness (m) CVC items and utilizing either a binary (yes—no) or rating response technique. Significant differences were obtained between levels of m with higher m items resulting in larger d' values. The interaction term was also significant reflecting a large difference between the binary-rating techniques with high meaningfulness items. The results indicate that the binary and rating techniques do not reveal identical findings in the analysis of recognition memory data and that the frequent use of the rating technique by researchers in the analysis of memory data may not be appropriate.     

Personality assessment in DSM-5: empirical support for rating severity, style, and traits

Despite a general consensus that dimensional models are superior to the categorical representations of personality disorders in DSM-IV, proposals for how to depict personality pathology dimensions vary substantially. One important question involves how to separate clinical severity from the style of expression through which personality pathology manifests. This study empirically distinguished stylistic elements of personality pathology symptoms from the overall severity of personality disorder in a large, longitudinally assessed clinical sample (N = 605). Data suggest that generalized severity is the most important single predictor of current and prospective dysfunction, but that stylistic elements also indicate specific areas of difficulty. Normative personality traits tend to relate to the general propensity for personality pathology, but not stylistic elements of personality disorders. Overall, findings support a three-stage diagnostic strategy involving a global rating of personality disorder severity, ratings of parsimonious and discriminant valid stylistic elements of personality disorder, and ratings of normative personality traits.     

Factors affecting the success of referential communication

A study was designed to determine the factors that cause difficulty to adolescent listeners performing referential communication. Difficulties might arise because of (a) inability to detect message inadequacy, (b) misperception of task demands, or (c) inability to formulate an adequate question. The results of the present study showed that both able and less able subjects were able to detect message inadequacy almost perfectly, but that less able subjects had severe difficulty in formulating adequate requests for more information. Analysis suggests that in our 13-to 14-year-old subjects information-processing limitations, rather than lack of purely linguistic skills, account for most of the error variance when the task demands are transparent.This research was supported by a grant from the Leverhulme Foundation (U.K.) to the third author, and a grant from the Economic and Social Research Council (U.K.) to the first author (reference CO8250011). We are grateful to R. Lee Humphreys for advice and assistance.     

Academics and entrepreneurs: Factors affecting the quality and utility of government-sponsored research

Evaluations of the factors contributing to the quality and utility of sponsored research have indicated that characteristics of the researchers and funding arrangements tend to explain differences among projects. This article examines the validity of assumptions about the effects of organizational environment, funding level, and project duration on the outcome of funded research. The results of this study suggest a need to reexamine ideas about the determinants of research quality and utility, and implications for managers of research studies are drawn from the findings.     

影响群体道歉有效性的因素

影响群体道歉有效性的因素是多方面的。对侵犯群体而言, 有效的群体道歉需要在言语表达中包含承认错误、承担责任、表达懊悔、做出承诺等内容, 需要讲究群体道歉的行为策略, 同时还应该关注道歉的内部动机对语言表达与行为方式的影响。对受害群体来讲, 侵犯群体道歉的有效性在于道歉本身缓解了其愤怒情绪, 满足了其自尊和期望等心理需求, 同时还要受到他们对道歉真诚性知觉程度的影响。除此之外, 群体道歉还会受到群际关系质量、冲突程度、文化信念等外部因素的影响。在今后的研究中, 应该继续尝试整合群体道歉的过程机制, 丰富群体道歉有效性的考察指标, 发挥道歉在社会生活领域中的积极作用。     

Some variables affecting the superstitious chaining of responses

This study was based upon a repeated acquisition technique that systematically generated superstitious chains of responses. Several procedures were investigated in an effort to modify the amount of superstitious chaining. The effects of a large work requirement, a stimulus correlated with non-reinforcement after inappropriate responses, an equivalent time delay after inappropriate responses, and extensive training were examined. The presentation of a stimulus correlated with non-reinforcement was found to be the most effective technique for reducing superstitious chaining; the time delay was the least effective.     

Factors affecting the onset and magnitude of linear vection

The role of central and peripheral vision in the production of linear vection was assessed by using displays in which flow structure and sources of internal and external depth information were manipulated. Radial optical flow was more effective for inducing self-motion in both central and peripheral visual fields than was lamellar flow in displays of the same size. The presence of external occlusion information was necessary to induce linear vection when small displays were composed of lamellar flow, whereas the effectiveness of small radial displays did not depend on the availability of occlusion edges.     

Eliciting attitudinal factors affecting the continuance use of E-scooters: An empirical study in Chicago

As e-scooters become more popular, service providers and policymakers are seeking ways to retain the existing customers and encourage them to continue to use e-scooters in the future. In this study, we extend the concepts of the technology acceptance model to identify the factors that affect the intention to continue using e-scooters. We build our findings based on survey data including 2126 shared e-scooter users in Chicago. Using Partial Least Squares Structural Equation Modeling, we analyzed the data and 10 proposed hypotheses. Our empirical results substantiate that the proposed model provides a theoretical framework to understand the continuance intention of shared e-scooter users. According to the findings, the most salient factor determining users’ decisions is perceived usefulness, followed by perceived reliability. The significance of reliability necessitates taking measures to guarantee the availability of e-scooters in times and places they are needed, particularly for mandatory trips. Additionally, social influence, perceived ease of use, variety seeking, and perceived enjoyment, are evinced to represent the other critical drivers of using e-scooter in the future, and in order of precedence. The insights from this study can assist shared e-scooter operators, transportation planners, and policymakers in making informed decisions and pave the way for a greater inclination to continue using shared e-scooters and move toward smart cities.     

Factors affecting judgments of fluency: I. interjections

Six speech samples containing varying amounts of schwa interjections were tape-recorded and presented to 36 male and 36 female listeners. For each sample, listeners were asked to make judgments of fluent, disfluent, and stuttered speech, and to answer the question “Would you recommend speech therapy?” Results indicated that speech samples containing 5% or more interjections evoked a judgment of disfluent speech by a majority of listeners. The sample containing 20% interjections, however, was found to evoke judgments of disfluent and stuttered speech about equally. Varying numbers of listeners recommended clinical services for disfluent speech. In general, the results indicated that (1) the presence of interjections in connected speech is not normal regardless of frequency, (2) fluent speech may not contain interjections in excess of 5%, and (3) with 20% interjections in speech, the distinction between disfluency and stuttering may be blurred.     

Factors affecting the division of labor in households

This study reports on the division of household labor in 108 Australian married-couple households and the factors which affect it. The data confirm the persistence of a very segregated division of household labor within Australian families and thus support L. Bryson's (“Thirty Years of Research on the Division of Labor in Australian Families,” Australian Journal of Sex, Marriage & Family, 1983, 4, 125–132) claim that the situation has changed very little in the last few decades. Nevertheless, some couples had moved toward more egalitarian arrangements, with the husband and wife sharing the majority of tasks. Performance of masculine household tasks is not predicted by many of the variables included in the study, with those most highly related being of an ideological nature (political orientation and egalitarianism) or personality variables (masculinity and femininity). Feminine household tasks, though, are done increasingly more often by women as time progresses in terms of age of parents, length of marriage, and number and ages of the children. These results may indicate true changes over time and/or cohort effects. Countering this trend toward greater traditionalism over time are factors that represent peoples' ideas or exposure to ideas, such as educational level achieved, whether currently receiving education, a Labor party political orientation (i.e., less conservative), and egalitarian attitudes. Occupational variables have less association than expected, and while males' income and hours worked mitigate against them participating in feminine areas of housework, women's work hours have no impact. The results for the number of shared tasks reflect those for the feminine tasks, such that as the feminine tasks are done relatively more often by women than by men, there is less sharing of tasks. The validity of measures of household task performance are discussed.