Navegando por Palavras-chave "Percepção de forma"

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    Comparison of Brazilian and American norms for the International Affective Picture System (IAPS)
    (Associação Brasileira de Psiquiatria - ABP, 2005-09-01) Ribeiro, Rafaela Larsen [UNIFESP]; Pompéia, Sabine [UNIFESP]; Bueno, Orlando Francisco Amodeo [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    OBJECTIVE: The present article compares Brazilian and American norms for the International Affective Picture System (IAPS), a set of normative emotional photographic slides for experimental investigations. METHODS: Subjects were 1,062 Brazilian university students (364 men and 698 women) who rated 707 pictures from the IAPS in terms of pleasure, arousal, and dominance following the methodology of the original normative study in the US, enabling direct comparison of data from the two samples through Pearson product moment correlation and Student t test. RESULTS: All correlations were highly significant with the highest level for the pleasure dimension, followed by dominance and arousal. However, contrary to the American normative values, our data showed that Brazilian subjects generally assigned higher arousal ratings overall. CONCLUSION: Our findings confirm that this set of stimuli can be used in Brazil as an affective rating tool due to the high correlations found across the two populations, despite differences on the arousal dimension, which are discussed in detail.
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    Internal validity, dimensionality and performance of the Body Shape Questionnaire in a group of Brazilian college students
    (Associação Brasileira de Psiquiatria - ABP, 2009-03-01) Di Pietro, Monica [UNIFESP]; Silveira, Dartiu Xavier da [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    OBJECTIVE: To adapt the Body Shape Questionnaire for use in the Brazilian population; to study the internal validity and the dimensionality of the scale when used in a non- clinical Brazilian population. METHOD: A cross- sectional study was accomplished comprising 164 students in the first 3 years of the School of Medicine conveniently selected at the Universidade Federal de São Paulo (UNIFESP). The 34- item Body Shape Questionnaire version and a questionnaire to assess demographic and anthropometric information were used. RESULTS: The internal consistency of the Body Shape Questionnaire measured by Cronbach's alpha was 0.97, indicating that the questions of the scale converge to the same construct. The factor analysis of the scale resulted in a four- dimension solution accounting for 66.4% of the total data variability. Regarding the final score of Body Shape Questionnaire, the mean score was 58.7 ± 25.1 for men and 89.7 ± 31.3 for women. DISCUSSION: We found statistically significant gender differences in the means of the Body Shape Questionnaire scores. Women showed higher dissatisfaction than did men as to their appearance as measured by the Body Shape Questionnaire. The adapted version of the scale seems to maintain the characteristics of the original scale.
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    Medida da visão e testes psicofísicos
    (Conselho Brasileiro de Oftalmologia, 2008-02-01) Kronbauer, Airton Leite [UNIFESP]; Schor, Paulo [UNIFESP]; Carvalho, Luis Alberto Vieira De [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP); University of Rochester
    Vision measurement is the basis for the study and standardization of visual sciences. Measurement of visual acuity has great value for research and for clinical practice. This paper (1) reviews the fundamental concepts to understand visual sense and the measuring units; (2) presents the fundamental limits to visual performance and the principles of aberration measurement of the eye; and (3) discusses methods for measuring and classifying vision with new technologies.