Applications for the Modified Scree Test Revisited

- The tradition of the social representations is the framework of research that is part of a wider project focused on the role of mass media, as part of cultural system, and on processes of anchorage and labelling involved to define the events under observation. We studied the social representations of French riots of November 2005 on headlines of 21 Italian daily newspapers with different cultural and ideological orientation. The aims of research, of comparative character, were the exploration: of consistence of results emerged in previous investigations, and of role played from newspapers and from temporal distance by the events 1) on structural organization of representational field, related to lexicon of headlines, and 2) on differential characterization of the lexicon of headlines 2a) of 21 newspapers and 2b) of two periods, more or less near to the beginning of events. The population, composed by 468 headlines, was collected by October 30 to November 18, 2005. The textual data, related to words of headlines, and the extra-textual data, related to newspapers, to period of publication (I and II week), to signature and sex of journalists, have been processed by different steps of statistical package SPAD-T. According to the scree-test were extracted two factors able to explain 20.40% of total variance. Through the intersection between the two factors we analyzed the factorial plan that, by providing the information more synthetic and exhaustive as possible, highlighted the existence of four areas otherwise characterized by the newspapers, by the two weeks and by the signature and gender of journalists. The differential analysis of lexicographical characterization of each of the 21 newspapers and of two periods, allowed the confirmation and deepening of what emerged in the structural analysis. Overall results showed the non-neutrality of language used by the headlines. It was functional to ideological and cultural profile of source, to its geographical area of reference and to temporal distance from origin of events. Furthermore results showed processes of anchorage and la- beling referable to need to preserve and strengthen specific groupal identity of the source.

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Multivariate analysis for head weight and yield performance of experimental cabbage hybrids (Brassica oleracea var. capitata L.)

Genetika ◽

10.2298/gensr1002259c ◽

2010 ◽

Vol 42 (2) ◽

pp. 259-266 ◽

Cited By ~ 1

Author(s):

Janko Cervenski ◽

Jelica Gvozdanovic-Varga ◽

Mirjana Vasic ◽

Svetlana Glogovac

Keyword(s):

Multivariate Analysis ◽

Brassica Oleracea ◽

Growing Season ◽

Commercial Production ◽

Yield Performance ◽

Head Weight ◽

Pca Method ◽

Scree Test

This paper reviews characters of 18 cabbage genotypes (9 experimental hybrids vs 4 cultivars and 5 hybrids from the domestic commercial production). The experimental genotypes differed in head weight, growing season and yield performance. The analysis of variability of the characters was performed by the PCA method. The two characters selected by the scree test accounted for 57.7% of the variability. Based on head weight and yield performance, the tested hybrids were classified into two clusters that differed quantitatively.

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Escala de Comportamentos de Bullying (ECB): Elaboração e Evidências Psicométricas

Psico-USF ◽

10.1590/1413-82712015200302 ◽

2015 ◽

Vol 20 (3) ◽

pp. 385-397 ◽

Cited By ~ 1

Author(s):

Emerson Diógenes de Medeiros ◽

Valdiney Veloso Gouveia ◽

Renan Pereira Monteiro ◽

Paulo Gregório Nascimento da Silva ◽

Bruna de Jesus Lopes ◽

...

Keyword(s):

Scree Test

Resumo Este estudo objetivou elaborar a Escala de Comportamentos de Bullying (ECB), checando evidências de validade e precisão. Participaram 455 estudantes do ensino fundamental de escolas públicas e particulares de Parnaíba (PI), com idade média de 11,3 anos, em maioria do sexo feminino (53,5%). Todos responderam à versão preliminar da medida, de 30 itens, e perguntas demográficas. Realizou-se a análise dos eixos principais (AEP) (rotação Varimax), o Scree Test, e a análise paralela indicou a existência de uma estrutura tetrafatorial. Logo, realizou-se uma nova AEP, fixando a extração de quatro fatores, estes explicaram conjuntamente 47,7% da variância total, cujos alfas de Cronbach variaram de 0,60 a 0,79. Esses achados revelam que a ECB reúne evidências favoráveis de validade e consistência interna, podendo ser adequadamente utilizada em estudos futuros para conhecer os antecedentes e consequências do bullying.

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The Shape of the Inverse Scree Test for Cluster Analysis

Educational and Psychological Measurement ◽

10.1177/001316448904900406 ◽

1989 ◽

Vol 49 (4) ◽

pp. 827-834 ◽

Cited By ~ 13

Author(s):

Richard G. Lathrop ◽

Janice E. Williams

Keyword(s):

Cluster Analysis ◽

Scree Test

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The Scree Test and the Number of Factors: a Dynamic Graphics Approach

The Spanish Journal of Psychology ◽

10.1017/sjp.2015.13 ◽

2015 ◽

Vol 18 ◽

Cited By ~ 29

Author(s):

Rubén Daniel Ledesma ◽

Pedro Valero-Mora ◽

Guillermo Macbeth

Keyword(s):

Principal Component Analysis ◽

Principal Component ◽

Real Data ◽

Component Analysis ◽

Psychological Research ◽

Scree Plot ◽

Dynamic Graphics ◽

Number Of Factors ◽

Interactive Data ◽

Scree Test

AbstractExploratory Factor Analysis and Principal Component Analysis are two data analysis methods that are commonly used in psychological research. When applying these techniques, it is important to determine how many factors to retain. This decision is sometimes based on a visual inspection of the Scree plot. However, the Scree plot may at times be ambiguous and open to interpretation. This paper aims to explore a number of graphical and computational improvements to the Scree plot in order to make it more valid and informative. These enhancements are based on dynamic and interactive data visualization tools, and range from adding Parallel Analysis results to "linking" the Scree plot with other graphics, such as factor-loadings plots. To illustrate our proposed improvements, we introduce and describe an example based on real data on which a principal component analysis is appropriate. We hope to provide better graphical tools to help researchers determine the number of factors to retain.

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Positive and Negative Affect in the Factor Structure of the State-Trait Anxiety Inventory for Japanese Workers

Psychological Reports ◽

10.2466/pr0.1998.82.2.651 ◽

1998 ◽

Vol 82 (2) ◽

pp. 651-656 ◽

Cited By ~ 32

Author(s):

Noboru Iwata ◽

Norio Mishima ◽

Takashi Shimizu ◽

Tetsuya Mizoue ◽

Machiko Fukuhara ◽

...

Keyword(s):

Factor Structure ◽

Trait Anxiety ◽

State Anxiety ◽

Principal Component ◽

The State ◽

State Trait Anxiety Inventory ◽

Japanese Adult ◽

Japanese Workers ◽

Scree Test ◽

Promax Rotation

The factor structure of Form Y of the State-Trait Anxiety Inventory (STAI-Y) was examined with 1,862 Japanese adult workers (1,509 men, 353 women). The initial principal component analysis extracted three factors based on the scree test. All 20 state (S-Anxiety) and 20 trait (T-Anxiety) items had dominant salient loadings on the first factor, which reflected “over-all anxiety.” The three factors identified by an oblique (promax) rotation were labeled “anxiety-absent,” “state anxiety-present,” and “trait anxiety-present.” All 20 items with dominant salient loadings on the first oblique factor were clearly grouped on the basis of their content, indicating the absence of anxiety. The second and third oblique factors, defined almost entirely by the STAI-Y anxiety-present items, clearly reflected the state-trait distinction in this sample of Japanese workers.

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Multidimensionality of Rotter's Locus of Control Scale

Psychological Reports ◽

10.2466/pr0.1987.61.1.273 ◽

1987 ◽

Vol 61 (1) ◽

pp. 273-274 ◽

Cited By ~ 4

Author(s):

Thomas H. McInish ◽

Mei Yan Lee

Keyword(s):

Locus Of Control ◽

Simple Structure ◽

Principal Component ◽

Latent Root ◽

Principal Factor ◽

Varimax Rotation ◽

Factor Solution ◽

Control Scale ◽

Structure Index ◽

Scree Test

McInish and Srivastava recently examined the multidimensionality of Rotter's Locus of Control Scale for common stock investors. Following principal-component analysis with a varimax rotation, these authors extracted nine factors using the scree test and the latent root criterion. Replication using the Very Simple Structure index yields a single-factor solution. Parkes' two-factor solution using the same Very Simple Structure technique is obtained only if principal-factor analysis is employed to obtain the initial factor pattern.

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Development and Psychometric Validation of the Mental, Physical, and Spiritual Well-Being Scale

Psychological Reports ◽

10.2466/pr0.1995.77.2.659 ◽

1995 ◽

Vol 77 (2) ◽

pp. 659-674 ◽

Cited By ~ 39

Author(s):

Dianne A. Vella-Brodrick ◽

Felicity C. L. Allen

Keyword(s):

Factor Analysis ◽

Discriminant Validity ◽

General Health Questionnaire ◽

Well Being ◽

Holistic Health ◽

Psychometric Validation ◽

Spiritual Well Being ◽

Components Analysis ◽

Activity Groups ◽

Scree Test

Due to the growing interest in holistic health and well-being, the Mental, Physical, and Spiritual Well-being Scale was developed. This well-being scale has 30 items and incorporates mental, physical, and spiritual subscales. An initial set of items was developed and 186 university students responded to these. An exploratory factor analysis was conducted using principal components analysis with varimax rotation ( N = 100) to reduce the number of items in the scale. Three factors were extracted based on the eigenvalues, loading coefficients exceeding 0.3, and the scree test. Ten items from each of the three factors were selected, reducing the number of items from 66 to 30. Another factor analysis, performed on 129 employees of the Commonwealth Scientific and Industrial Research Organisation and 229 students from Monash University, indicated three factors were representative of the mental, physical, and spiritual subscales. Test-retest reliabilities over 1 mo. ranged from 0.87 to 0.97 for the three subscales whilst internal consistency ranged from 0.75 to 0.85. Concurrent validity was examined using the General Health Questionnaire and the Spiritual Well-being Scale. The discriminant validity of the MPS was also explored using three activity groups nominated as highly physical (weight training) or highly mental (chess) or highly spiritual (prayer). Out of a total of 88 cases, 77.3% of these were correctly classified into their actual activity group based on their scores. Sample sizes were moderate and testing was of limited samples. More psychometric work is needed but preliminary findings indicate an accurate and reliable test.

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Reliability, validity and psychometric properties of the Greek translation of the posttraumatic stress disorder scale

Mental Illness ◽

10.1108/mi.2017.6832 ◽

2017 ◽

Vol 9 (1) ◽

pp. 5-9

Author(s):

Konstantinos Kontoangelos ◽

Sofia Tsiori ◽

Garyfalia Poulakou ◽

Konstantinos Protopapas ◽

Ioannis Katsarolis ◽

...

Keyword(s):

Posttraumatic Stress Disorder ◽

Posttraumatic Stress ◽

Stress Disorder ◽

Correlation Coefficients ◽

Post Traumatic Stress ◽

Greek Version ◽

Intra Class Correlation ◽

Post Traumatic ◽

Test Retest Reliability ◽

Scree Test

The Greek version of the Davidson Trauma Scale (DTS) was developed to respond to the need of Greek-speaking individuals. The translated questionnaire was administered to 128 HIV outpatients (aged 37.1±9.1) and 166 control patients (aged 32.4±13.4). In addition to the DTS Greek scale, subjects were assessed with two other scales useful for assessing validity. For each factor analyses two components were extracted, based on Cattell's scree test. The two components solution accounted for 55.34% of the total variation in case of frequency variables and 61.45% in case of severity variables. The Cronbach's alpha coefficient and Guttman split-half coefficient of the DTS scale were 0.93 and 0.88 respectively. The test-retest reliability of the Greek version of DTS scale proved to be satisfactory. Individual items had good intra-class correlation coefficients higher than 0.5, which means that all questions have high levels of external validity. The psychometric strength of interview for post-traumatic stress disorder-Greek version it's reliable for its future use, particularly for screening subjects with possible diagnosis of posttraumatic stress disorder.

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Development of the Telemedicine Satisfaction Questionnaire to evaluate patient satisfaction with telemedicine: a preliminary study

Journal of Telemedicine and Telecare ◽

10.1258/135763303321159693 ◽

2003 ◽

Vol 9 (1) ◽

pp. 46-50 ◽

Cited By ~ 66

Author(s):

M P Yip ◽

Anne M Chang ◽

Juliana Chan ◽

Ann E MacKenzie

Keyword(s):

Patient Satisfaction ◽

Intraclass Correlation ◽

Reliability And Validity ◽

Education Programme ◽

Satisfaction Questionnaire ◽

Face To Face ◽

Components Analysis ◽

Scree Test

We developed a questionnaire for the evaluation of patient satisfaction with telemedicine. Items related to patient satisfaction with telemedicine were identified through a review of the literature. The internal consistency and the intraclass correlation coefficient were used to evaluate the reliability of the proposed instrument. Content validity was examined using a panel of experts. The predictive validity of the proposed instrument was assessed by correlating scores on the Telemedicine Satisfaction Questionnaire (TSQ) with haemoglobin A1c levels and adherence to self-management activities among 38 patients with type 2 diabetes, after they had completed a four-session interactive diabetes tele-education programme. A principal-components analysis with varimax rotation was performed to reduce the number of questionnaire items from 15 to 14, and the scree test was used to select significant factors. There were three components with eigenvalues over 1.0, which together explained 68% of the total variance. These were: quality of care provided, similarity to face-to-face encounter and perception of the interaction. The TSQ demonstrated preliminary reliability and validity but more extensive testing will be required before it can be considered generally applicable.

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