Browsing by Subject "Perception"

Now showing 1 - 4 of 4
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    Certain aspects of visual perception in some "autistic" children
    (1972) Lazarus, Janet Ray; Grover, Vera
    Identification strategies and patterns of visual inspection in relation to non-perceptual variables, rapport and discrimination set, were studied in 3 "autistic" Ss, using experimental materials relevant to various forms of visual perception. A qualitative, single case approach was followed, using as controls, individually matched Ss representing various points on a developmental continuum. Marked differences were found between 2 "autistic" Ss as compared with the third "autistic" S and the majority of control Ss in all variables, although 2 young normal Ss exhibited features similar to the 2 "autistic" Ss. It therefore appeared that in some "autistic" Ss, there was disturbance at selective and identifying levels of perception associated with deficiencies in non-perceptual factors. The disturbance appeared developmental rather than deviant in nature.
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    Open Access
    Experimental transformation of the perception of colour
    (1972) Abramovitz, Arnold; Du Preez, Peter
    This thesis presents an argument about the basis of our experience of colour. The argument is conducted by means of an interplay between a set of axioms, deductions from a particular theory (including "thought experiments" which explore the logic of those deductions), and concrete empirical evidence. The axioms and the theory are those of James G. Taylor. The title of the thesis refers to the general methodology adopted. The term "experimental transformation" carries specific connotations; and the notions from which it is derived, and to which it gives rise, have to be understood in the context of the total argument. If the argument presented is sound, then certain implications follow which, it is claimed, force us to reconsider many current assumptions about the nature of "colour sensation" and indeed about the very meaning to be ascribed to the term colour. This in turn would have significance for colour science, psychology and epistemology in general.
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    HIV risk perception and behavior among medically and traditionally circumcised males in South Africa
    (2016) Zungu, N P; Simbayi, L C; Mabaso, M; Evans, M; Zuma, K; Ncitakalo, N; Sifunda, S
    Abstract Background In South Africa, voluntary medical male circumcision (VMMC) has recently been implemented as a strategy for reducing the risk of heterosexual HIV acquisition among men. However, there is some concern that VMMC may lead to low risk perception and more risky sexual behavior. This study investigated HIV risk perception and risk behaviors among men who have undergone either VMMC or traditional male circumcision (TMC) compared to those that had not been circumcised. Methods Data collected from the 2012 South African national population-based household survey for males aged 15 years and older were analyzed using bivariate and multivariate multinomial logistic regression, and relative risk ratios (RRRs) with 95 % confidence interval (CI) were used to assess factors associated with each type of circumcision relative no circumcision. Results Of the 11,086 males that indicated that they were circumcised or not, 19.5 % (95 % CI: 17.9–21.4) were medically circumcised, 27.2 % (95 % CI: 24.7–29.8) were traditionally circumcised and 53.3 % (95 % CI: 50.9–55.6) were not circumcised. In the final multivariate models, relative to uncircumcised males, males who reported VMMC were significantly more likely to have had more than two sexual partners (RRR = 1.67, p = 0.009), and males who reported TMC were significantly less likely to be low risk alcohol users (RRR = 0.72, p < 0.001). Conclusion There is a need to strengthen and improve the quality of the counselling component of VMMC with the focus on education about the real and present risk for HIV infection associated with multiple sexual partners and alcohol abuse following circumcision.
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    The referral letter: a problem of communication
    (1991) Lachman, P I; Stander, I A
    This cross-sectional descriptive study assesses the letters sent with referred patients and makes appropriate recommendations. During the 6-month period 1 July-31 December 1987, 9288 letters were photocopied at the admissions offices of the hospital. Detailed analysis of 1143 (12,3%) letters was undertaken. The private sector, i.e. general practitioners, was the largest referral agency, followed by community-based day hospitals.This cross-sectional descriptive study assesses the letters sent with referred patients and makes appropriate recommendations. During the 6-month period 1 July-31 December 1987, 9288 letters were photocopied at the admissions offices of the hospital. Detailed analysis of 1143 (12,3%) letters was undertaken. The private sector, i.e. general practitioners, was the largest referral agency, followed by community-based day hospitals.