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排序方式: 共有289条查询结果,搜索用时 15 毫秒
81.
Hans‐Friedrich Köhn Chia‐Yi Chiu Michael J. Brusco 《The British journal of mathematical and statistical psychology》2015,68(2):268-291
Cognitive diagnosis models of educational test performance rely on a binary Q‐matrix that specifies the associations between individual test items and the cognitive attributes (skills) required to answer those items correctly. Current methods for fitting cognitive diagnosis models to educational test data and assigning examinees to proficiency classes are based on parametric estimation methods such as expectation maximization (EM) and Markov chain Monte Carlo (MCMC) that frequently encounter difficulties in practical applications. In response to these difficulties, non‐parametric classification techniques (cluster analysis) have been proposed as heuristic alternatives to parametric procedures. These non‐parametric classification techniques first aggregate each examinee's test item scores into a profile of attribute sum scores, which then serve as the basis for clustering examinees into proficiency classes. Like the parametric procedures, the non‐parametric classification techniques require that the Q‐matrix underlying a given test be known. Unfortunately, in practice, the Q‐matrix for most tests is not known and must be estimated to specify the associations between items and attributes, risking a misspecified Q‐matrix that may then result in the incorrect classification of examinees. This paper demonstrates that clustering examinees into proficiency classes based on their item scores rather than on their attribute sum‐score profiles does not require knowledge of the Q‐matrix, and results in a more accurate classification of examinees. 相似文献
82.
《Revue Européene de Psychologie Appliquée》2016,66(1):39-46
Introduction/ObjectiveThe aim of this study was to investigate, using path analysis (Lisrel 8.52), the relationships between subjective memory complaint and cognitive inhibition, lifestyle, and psycho-affective variables on a sample of non-demented older adults.MethodOur sample was composed of 109 older adults, who were required to undertake two cognitive inhibition tasks (stroop and verbal fluency) and to respond to scales designed to measure individuals’ psycho-affective status (depression/subjective health) and subjective memory complaint level (Mac Nair). Lifestyle predictors (education and activity levels) were also assessed.Results/ConclusionThis study highlights the importance of adopting a multifactorial approach to the study of subjective memory complaint. In addition to executive variables (verbal fluency task), predictors such as subjective health and activity levels seem to be crucial in our understanding of the psychological nature of subjective memory complaint. 相似文献
83.
近年来,群体认同与个体心理健康的关系得到了研究者的关注。本研究通过对相关文献的梳理与归纳发现:民族、国家、学校、家庭等不同种类群体的认同,群体认同数量与个体心理健康的关系显著;群体认同与个体心理健康之间的关系受群体认同动机和个体对群体评价的调节,并依赖于自尊、社会支持、控制知觉、归因方式等因素的中介;未来应利用多种方法继续研究群体认同与个体心理健康关系的调节变量与作用机制。 相似文献
84.
We report three experiments investigating whether people's judgments about causal relationships are sensitive to the robustness or stability of such relationships across a range of background circumstances. In Experiment 1, we demonstrate that people are more willing to endorse causal and explanatory claims based on stable (as opposed to unstable) relationships, even when the overall causal strength of the relationship is held constant. In Experiment 2, we show that this effect is not driven by a causal generalization's actual scope of application. In Experiment 3, we offer evidence that stable causal relationships may be seen as better guides to action. Collectively, these experiments document a previously underappreciated factor that shapes people's causal reasoning: the stability of the causal relationship. 相似文献
85.
Intersections are critical points within the highway system at which the risk of crashes increases. This study seeks to better understand drivers’ behavior at an intersection by examining the relationship between their observed driving behavior, psychological attributes and decision to proceed through an intersection. A driving simulator and self-report questionnaire were used to understand driver decision-making at the onset of the yellow phase across several signalized intersections. The simulator measured driving outcomes such as speed, braking, and throttle as drivers cross through four increasingly difficult intersections. The questionnaires measured demographics, psychological traits including mindfulness and impulsiveness along with self-reported driving behaviors. A total of 102 participants completed the questionnaire as well as the driving simulator experiment. Hierarchical clustering served to classify drivers into four groups on the basis of their observed driving in the simulator: the safest drivers, safe drivers, speed demons, and aggressive drivers. These driving styles moderated the relationship between the drivers’ psychological traits and their decision to stop or proceed at each intersection. Results showed that mindfulness was highly related to the safest drivers’ decision to stop at the first intersection, while impulsiveness and anxiety were related to the speed demons’ decision to stop at the third intersection. These findings lay a strong foundation for developing progressive educational campaigns incorporating driver psychology in their methodology. Findings also provide support for research linking driving performance and psychological traits with implications for intersection design. 相似文献
86.
This study investigated processing of number and extent in newborns. Using visual preference, we showed that newborns discriminated between small sets of dot collections relying solely on implicit numerical information when non-numerical continuous variables were strictly controlled (Experiment 1), and solely on continuous information when numerical variables were controlled (Experiment 2). When number and extent were pitted against each other (Experiment 3), newborns showed no visual preference, suggesting that the two variables play comparable roles in attracting newborns’ visual attention. In contrast to reports of dominance of continuous variables, these findings suggest that multiple dimensions attract newborns’ attention and guide their visual exploration. 相似文献
87.
Rob J.H. van Bree Maartje M. van Stralen Catherine Bolman Aart N. Mudde Hein de Vries Lilian Lechner 《Psychology & health》2013,28(5):514-532
This longitudinal study examined whether habit strength moderates the intention–physical activity (PA) relationship in older adults, within the framework of the attitude–social influences–efficacy (ASE) model and the theory of planned behaviour (TPB). A total of 1836 older adults (M age?=?62.95?years, SD age?=?8.17) completed a questionnaire on social cognitive constructs and PA habit strength at baseline, and six?months later a measure of PA. Three PA habit groups (i.e. low, medium and high) were composed, based on tertiles of the mean index score. Multi-group structural equation modelling analyses showed that intention significantly determined PA behaviour only in participants with a low or medium habit strength towards PA. This result suggests that PA is not intentional at high levels of habit strength and demonstrates the usefulness of incorporating habit in the ASE and TPB models. Results also showed that about half of the participants with a strong PA habit did not meet the recommended PA level. As strong habits may prevent intentional behavioural change and may hinder the receptiveness and openness for informational PA change strategies, additional intervention strategies, such as awareness raising and the use of implementation intentions, are needed for strongly habitual, but insufficiently active older adults. 相似文献
88.
Abstract This study focused on gender differences in the relationship of four moderator variables (hostility, social support, optimism, and Type A behavior) to perceptions of symptoms and stress based on a sample of 120 female and 79 male undergraduates. Results confirmed significant gender differences in hostility, Type A behavior, and social support but not in optimism. Multiple regression analyses exposed distinct gender differences. For females, social support accounted for 21% and hostility 5% of the total variance in perceived stress. For males, only hostility accounted for any significant variance (10%). Hostility contributed 21% and social support contributed 13% to the total variance in the number of symptoms for females. For males, optimism contributed 14% and hostility 5%. Results indicate that social support is a potent variable for females in their perception of both stress and symptoms but essentially unrelated for males. Hostility, however, relates to perceptions of stress and symptoms for both sexes. 相似文献
89.
Armando Rodríguez Pérez 《Estudios de Psicología》2013,34(14-15):17-30
Re?umenCon el fin de acumular información sobre las características definitorias del hecho diferencial canario, se llevaron a cabo tres investigaciones en el marco general de las actitudes. En todas ellas se tomaron variables sociológicas y geográficas como base de los contrastes, utilizando en todos los casos muestras representativas dé la población estudio. 相似文献
90.
《Estudios de Psicología》2013,34(61):51-59
ResumenEl tema central del presente trabajo es la descripción de los estadios a lo largo de los cuales se produce el desarrollo de la conducta de fumar tabaco.Se abarca el período que comprende desde que el niño tiene conocimiento del tabaco, aún sin haberlo probado, hasta que el individuo se convierte en un fumador adicto. En cada uno de los cinco estadios que se proponen: preparación, iniciación, experimentación, habituación y adicción, se realiza una síntesis de las principales variables y procesos condicionant es d la conducta de fumar. Este análisis tiene una utilidad clara para el diseño de intervenciones tanto terapeúticas como educativo-preventivas en este campo. 相似文献