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71.
The field of engineering is defined by a number of specialty areas, thus most engineering students must decide upon an educational specialty track within the engineering major. Data on familiarity with, and perceptions of similarity among 11 engineering specialties were collected from 129 undergraduate engineering students from a public urban university. Similarity data were collected by way of a paired comparison task, and multidimensional scaling techniques were used to map these data into spatial representations. A three-dimensional solution was selected. Analysis of variance procedures also were used to examine differences in perceptions of engineering specialties by gender, ethnicity, commitment to career choice, and career decision-making self-efficacy. Results indicated that female students rated engineering specialties as more prestigious than male students, and students with a more dogmatic stance towards career rated engineering as relatively exclusive to men. 相似文献
72.
Sebastian Wallot 《Multivariate behavioral research》2019,54(2):173-191
In this paper, Multidimensional Cross-Recurrence Quantification Analysis (MdCRQA) is introduced. It is an extension of Multidimensional Recurrence Quantification Analysis (MdRQA), which allows to quantify the (auto-)recurrence properties of a single multidimensional time-series. MdCRQA extends MdRQA to bi-variate cases to allow for the quantification of the co-evolution of two multidimensional time-series. Moreover, it is shown how a Diagonal Cross-Recurrence Profile (DCRP) can be computed from the MdCRQA output that allows to capture time-lagged coupling between two multidimensional time-series. The core concepts of these analyses are described, as well as practical aspects of their application. In the supplementary materials to this paper, implementations of MdCRQA and the DCRP as MatLab- and R-functions are provided. 相似文献
73.
David B. MacKay 《Journal of mathematical psychology》2007,51(5):305-318
A solution is presented for an internal multidimensional unfolding problem in which all the judgments of a rectangular proximity matrix are a function of a single-ideal object. The solution is obtained by showing that when real and ideal objects are represented by normal distributions in a multidimensional Euclidean space, a vector of distances among a single-ideal and multiple real objects follows a multivariate quadratic form in normal variables distribution. An approximation to the vector's probability density function (PDF) is developed which allows maximum likelihood (ML) solutions to be estimated. Under dependent sampling, the likelihood function contains information about the parametric distances among real object pairs, permitting the estimation of single-ideal solutions and leading to more robust multiple-ideal solutions. Tests for single- vs. multiple-ideal solutions and dependent vs. independent sampling are given. Properties of the proposed model and parameter recovery are explored. Empirical illustrations are also provided. 相似文献
74.
We describe a principled way of imposing a metric representing dissimilarities on any discrete set of stimuli (symbols, handwritings,
consumer products, X-ray films, etc.), given the probabilities with which they are discriminated from each other by a perceiving
system, such as an organism, person, group of experts, neuronal structure, technical device, or even an abstract computational
algorithm. In this procedure one does not have to assume that discrimination probabilities are monotonically related to distances,
or that the distances belong to a predefined class of metrics, such as Minkowski. Discrimination probabilities do not have
to be symmetric, the probability of discriminating an object from itself need not be a constant, and discrimination probabilities
are allowed to be 0’s and 1’s. The only requirement that has to be satisfied is Regular Minimality, a principle we consider the defining property of discrimination: for ordered stimulus pairs (a,b), b is least frequently discriminated from a if and only if a is least frequently discriminated from b. Regular Minimality generalizes one of the weak consequences of the assumption that discrimination probabilities are monotonically
related to distances: the probability of discriminating a from a should be less than that of discriminating a from any other object. This special form of Regular Minimality also underlies such traditional analyses of discrimination
probabilities as Multidimensional Scaling and Cluster Analysis.
This research was supported by the NSF grant SES 0318010 (E.D.), Humboldt Research Award (E.D.), Humboldt Foundation grant
DEU/1038348 (H.C. & E.D.), and DFG grant Co 94/5 (H.C.). 相似文献
75.
《Quarterly journal of experimental psychology (2006)》2013,66(1):63-83
Two experiments on the internal representation of auditory stimuli compared the pairwise and grouping methodologies as means of deriving similarity judgements. A total of 45 undergraduate students participated in each experiment, judging the similarity of short auditory stimuli, using one of the methodologies. The experiments support and extend Bonebright's (1996) findings, using a further 60 stimuli. Results from both methodologies highlight the importance of category information and acoustic features, such as root mean square (RMS) power and pitch, in similarity judgements. Results showed that the grouping task is a viable alternative to the pairwise task with N > 20 sounds whilst highlighting subtle differences, such as cluster tightness, between the different task results. The grouping task is more likely to yield category information as underlying similarity judgements. 相似文献
76.
Debbie Bonetti Marie Johnston Jesus Rodriguez-marin Mariangeles Pastor Maite Martin-aragon Eva Doherty 《Psychology & health》2013,28(6):655-674
Abstract This study investigated whether measures of three perceived control (PC) concepts tapped independent dimensions, were invariant to population characteristics of health and culture, were differentially sensitive to health outcomes, and were discriminable from self-report disability. The Multidimensional Health Locus of Control, Generalized Self-efficacy, and Perceived Health Competence (PHC) Scales were administered to 106 Scottish students and 145 Scottish, Spanish and Irish patients, who also completed versions of the Sickness Impact Profile. Principal Components analyses revealed five factors reflecting scale constructions for students and six factors for patients, as PHC items fell on two factors. Disability items fell on a separate factor from all PC items. Results suggest: (a) PC is multidimensional regardless of health and culture; (b) adequate assessment requires multiple PC measures; and (c) it is meaningful to consider PC as a possible influence on disability. 相似文献
77.
Christopher J. Armitage 《Psychology & health》2013,28(6):723-738
The present article tests the predictive and convergent validity of distal and proximal indices of perceived control, as measured by multidimensional health locus of control (MHLC) and perceived behavioural control (PBC), across 12 health behaviours. The study (n = 235) employed a cross-sectional design and examined 12 health-related behaviours: binge drinking, fruit and vegetable consumption, exercise, eating junk food, safe sex (condom use), teeth brushing, teeth flossing, cigarette smoking, blood donation, taking vitamin supplements, using marijuana, and attending health screening. Respondents completed questionnaire measures of MHLC, health value, PBC, and behavioural intention. The data were analysed using a combination of between- and within-persons correlations and hierarchical multiple regression. Between-persons analyses showed that although MHLC accounted for 4% of the variance in behavioural intentions whereas PBC accounted for 21%, PBC did not fully mediate the effects of MHLC on intention. Within-persons analyses demonstrated that internal health locus of control was predictive of the within-persons correlation between PBC and intention, suggesting there may be a dispositional basis to perceived control. Further work that examines the relationship between distal and proximal perceptions of control is required. 相似文献
78.
Liesbet Boone Bart Soenens Athanasios Mouratidis Maarten Vansteenkiste Joke Verstuyf Caroline Braet 《Journal of research in personality》2012
Multidimensional perfectionism has been shown to play an important role in eating disorders (EDs). However, research examining this relation has primarily focused on relatively stable inter-individual differences between persons, thereby failing to examine how these variables are associated within individuals on a daily basis. This study examines how daily fluctuations in Personal Standards (PS) perfectionism and Evaluative Concerns (EC) perfectionism relate to each other and to fluctuations in ED symptoms. Adolescents (N = 275) completed questionnaires each evening during seven consecutive days. Multilevel modeling showed significant day-to-day fluctuations in PS and EC perfectionism, and showed that both dimensions are intertwined in the day. Among females, fluctuations in EC perfectionism co-varied with fluctuations in ED symptoms. 相似文献
79.
Jay-Lee Longbottom J. Robert GroveJames A. Dimmock 《Psychology of sport and exercise》2012,13(2):224-235
Objectives
Motivational and self-presentational processes pervade all aspects of our lives including exercise behaviors. Furthermore, trait perfectionism has been shown to heighten self-presentational tendencies and energize achievement striving ( [Flett and Hewitt, 2002] and [Hewitt et?al., 2003]). How maladaptive and adaptive perfectionism traits relate to these cognitive and behavioral processes specific to the exercise context remains to be determined. This study employed structural equation modeling to examine the associations between maladaptive and adaptive perfectionism, self-determination of exercise behavior, self-presentation in exercise, and exercise behavior.Method
Two hundred and fifty-four undergraduate students completed items assessing frequency, intensity, and duration of aerobic exercise behavior, along with measures of Multidimensional Perfectionism (Cox, Enns, & Clara, 2002), Self-Presentation in Exercise ( [Conroy et?al., 2000] and [Gammage et?al., 2004]), and self-determination of exercise behavior utilizing the Behavioral Regulation in Exercise Questionnaire (BREQ-2; Markland & Tobin, 2004).Results
Results supported a structural model in which the associations between perfectionism dimensions and aerobic exercise behavior were mediated by opposing relationships with relative autonomy (RAI; Markland & Tobin, 2004) and self-presentation processes. Distinctively, maladaptive perfectionism demonstrated an inverse direct effect on the RAI and positive direct effects on self-presentation processes. In contrast, adaptive perfectionism exerted a positive direct effect on the RAI and inverse direct effects on self-presentation processes.Conclusions
These findings highlight the importance of both maladaptive and adaptive dimensions of perfectionism in the study of exercise outcomes and within the broader social context linking perfectionism and motivation. 相似文献80.
Focusing on one's body can improve the awareness and regulation of emotion. Interoception – sensing the physiological condition of the body, particularly of the viscera – appears to play an important role. While the majority of previous research studies have examined interoceptive sensitivity (i.e., detection of objectively measurable physiological changes), there has been relatively limited investigation of interoceptive sensibility (i.e., subjective awareness of those changes), and even fewer studies permitting causal conclusions. The current study is part of a randomised controlled trial on visceroception in the context of emotion regulation, using an 8-week intervention involving focused attention on either cardiac or gastrointestinal activity. Group differences in emotion regulation and reactivity were assessed using the Multidimensional Assessment of Interoceptive Awareness (MAIA), the Difficulties in Emotion Regulation Scale, and the Emotion Reactivity Scale (ERS). The findings suggest that focussed attention on gastrointestinal activity (i.e., gastroception), in particular, improves interoceptive sensibility and emotion regulation, as evidenced by increases on the MAIA's Noticing, Body Listening, and Self-regulation subscales, and decreases on the Arousal subscale of the ERS. Gastroception may make distinct contributions to the benefits of body focus in a research context where the gut is often overlooked. 相似文献