996 resultados para Sacka, Ron


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In a qualitative study, 20 HIV-infected Australian gay men were interviewed about their decision not to access antiretroviral drug therapy. The main reasons given for the decision were fear of side effects; fear of long-term damage to body organs; the inconvenience of the treatment regimens; belief that the regimen's demands would be a threat to morale; and belief that there was no reason to start therapy in the absence of AIDS-related symptoms. Actions taken by the men to monitor and maintain their health included seeing a doctor regularly; having regular T-cell and viral load tests; and trying to maintain a positive outlook by not letting HIV/AIDS 'take over' their lives. Almost half the men considered they had been subjected to unreasonable pressure to access therapy and there was considerable pride at having resisted this pressure. The findings suggest that the men disagreed with the biomedical model for managing HIV/AIDS only on the question of if and when to access therapy. They also suggest that underlying the men's dissent from the biomedical model was a different mode of thinking than is required by the model: while the model demands thinking that is abstract, the men focused strongly on factors close to the 'here and now' of immediate experience. The practical implications of the findings are explored.

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In 3 studies we recorded gay men's estimates of the likelihood that HIV would be transmitted in various sexual behaviours. In Study 1 (data collected 1993, n=92), the men were found to believe that transmissibility is very much greater than it actually is; that insertive unprotected anal intercourse (UAI) by an HIV-infected partner is made safer by withdrawal before ejaculation, and very much safer by withdrawal before either ejaculation or pre-ejaculation; that UAI is very much safer when an infected partner is receptive rather than insertive; that insertive oral sex by an infected partner is much less risky than even the safest variant of UAI; that HIV is less transmissible very early after infection than later on; and that risk accumulates over repeated acts of UAI less than it actually does. In Study 2 (data collected 1997/8, n=200), it was found that younger and older uninfected men generally gave similar estimates of transmissibility, but that infected men gave somewhat lower estimates than uninfected men; and that estimates were unaffected by asking the men to imagine that they themselves, rather than a hypothetical other gay man, were engaging in the behaviours. Comparison of the 1993 and 1997/8 results suggested that there had been some effect of an educational campaign warning of the dangers of withdrawal; however, there had been no effect either of a campaign warning of the dangers of receptive UAI by an infected partner, or of publicity given to the greater transmissibility of HIV shortly after infection. In Study 3 (data collected 1999, n=59), men induced into a positive mood were found to give lower estimates of transmissibility than either men induced into a neutral mood or men induced into a negative mood. It is argued that the results reveal the important contribution made to gay men's transmissibility estimates by cognitive strategies (such as the 'availability heuristic' and 'anchoring and adjustment') known to be general characteristics of human information-processing. Implications of the findings for AIDS education are discussed.

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There is a widely held view in the literature that foreign companies looking to invest in the China market should opt for joint ventures rather than wholly foreign-owned enterprises for many reasons, ranging from a smaller capital commitment to utilising the market knowledge of local Chinese partners. This paper examines this issue in the light of the experience of the Foster's Brewing Group which established three joint ventures in China only to reject this form of market entry option within a few years. The paper looks at some of the reasons behind Foster's rejection of the joint venture option and proposes some key guidelines that foreign companies should follow if they are to successfully establish joint ventures in China.

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In two studies, the effects of induced mood on the AIDS-related judgements of gay men were investigated. Participants were induced into a positive, neutral, or negative mood by recall of affect-laden autobiographical memories; they then made AIDS-related judgements. In Study 1 (n=30), the men indicated their level of agreement with statements expressing optimism about the efficacy of antiretroviral treatments for HIV/AIDS. Those induced into a positive mood indicated stronger agreement than did those induced into a neutral or negative mood. In Study 2 (n=83), participants read brief descriptions of men they did not know and estimated the likelihood that they were HIV-infected. Each sketch highlighted one characteristic of the man described. There were two versions of each sketch (e.g., the versions of the sketch highlighting intelligence described the man either as very intelligent or as very unintelligent), given to different participants. Stereotype use was inferred if significantly different estimates were given for the two versions of a sketch. Reliance on stereotypes was found most often in the positive mood condition and least often in the negative mood condition. The findings are consistent with, and suggest explanations for, earlier correlational evidence that, in gay men of the age group studied, sexual risk-taking is associated with a positive mood. Suggestions are made for how AIDS educators might address the contributions of mood states to sexual risk-taking.

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Suppressing a thought often results in postsuppressional rebound, that is, a subsequent increase in the incidence of the suppressed thought. The present study was dcsigned to distinguish between two explanations of rebound: Wegner's 1994 ironic monitoring theory and Liberman and Forster's 2000 motivational account. Participants (99 Deakin University students) first suppressed, then expressed, thoughts of a white bear. In some conditions, a delay--presented as occurring either intentionally or unintentionally--between suppression and expression was introduced. In other conditions, participants concurrently completed a memory task and were encouraged to antribute the difficulty of suppression either to this task or to the requirement of suppression. An intentional delay, but not an unintentional delay, reduced rebound, while attributing difficulty to the suppression requirement was associated with greater rebound than was attributing it to the memory task. The results are interpreted as supporting Liberman and Forster's motivational account of rebound.

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This paper was presented in a session at the AIDS Impact conference devoted to a debate on the methods that should be used to evaluate educational interventions. The paper highlights two desiderata for evaluation of interventions directed at gay men. First, the view is presented that there is no acceptable substitute for assessing the effect of an intervention on gay men's sexual behaviour (rather than, for example, their AIDS-related attitudes or beliefs). This view is justified in terms of (a) the differences that exist between AIDS-related thinking in the cold light of day and during actual sexual encounters; and (b) the often faulty nature of intuitions about the factors that contribute to sexual risk-taking and the ways in which it might be reduced. Second, it is argued that the randomized control study design represents the best means for ensuring that interventions will be as effective as possible. Criticisms which have been made of this design are discussed and the conclusion drawn that they do not amount to a strong case against it.

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The effect of event valence on unrealistic optimism was studied. 94 Deakin University students rated the comparative likelihood that they would experience either a controllable or an uncontrollable health-related event. Valence was manipulated to be positive (outcome was desirable) or negative (outcome was undesirable) by varying the way a given event was framed. Particiapants either were told the conditions which promote the event and rated the comparative likelihood they would experience it or were told the conditions which prevent the event and rated the comparative likelihood they would avoid it. For both the controllable and the uncontrollable events, unrealistic optimism was greater for negative than positive valence. It is suggested that a combination of the 'motivational account' of unrealistic optimism and prospect theory provides a good explanation of the results. 

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Among the self-justifications that gay men use when engaging in high-risk sex is the thought that they are less at risk than most gay men. Two explanatory models of such 'unrealistic optimism' (UO) have been proposed: while the motivational account holds that UO arises because it serves the function of bringing comfort, the cognitive account holds that UO serves no particular function, being simply a by-product of normal cognitive strategies. This study investigated predictions derived from the motivational account. Gay men uninfected with HIV (n = 88) answered two test questions, requiring them to estimate, respectively, their own risk of becoming infected and that of the average gay man. The questions were presented in the two possible orders, and were either separated or not separated by unrelated filler material. The great majority of the men (89%) exhibited UO. Neither question order nor the interpolation of filler material affected responses to either test question. The results were inconsistent with the motivational account, but explicable in terms of the cognitive account. It seems that the cognitive account provides the better explanation of at least that form of UO measured in this study. Implications for AIDS educators are discussed.

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This review describes several factors involved in regulating skeletal muscle creatine uptake and total creatine content. Skeletal muscle total creatine content increases with oral creatine supplementation, although the response is variable. Factors that may account for this variation are carbohydrate intake, physical activity, training status, and possibly fiber type.

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Among the self-justifications that gay men use when deciding to have unprotected intercourse is the thought that they are at less risk than most gay men. Two explanatory models of such 'unrealistic optimism' (UO) have been proposed: while the motivational account holds that UO serves the function of bringing comfort, the cognitive account holds that UO serves no particular function, being simply a by-product of normal cognitive strategies. This study tested the prediction, derived from the motivational account, that highlighting the salience of the self-other comparison should increase UO. Gay men uninfected with HIV (n = 122) estimated both their own risk of contracting various health problems - among them, becoming infected with HIV - and that of the average gay man. The purported aim of collecting the data was varied, so as to either make the self-other comparison central to the aim or render one of the two types of estimate irrelevant to the aim. No effect on UO was found. It seems that the cognitive account provides a better explanation than does the motivational account of at least that form of UO measured in this study. Implications for AIDS education are discussed.

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Unrealistic optimism is assessed using either a single question, the rating of own likelihood of experience an event compared to that of the average person, or two questions, separate rating of own likelihood and that of the average person. The effect of using valence on more unrealistic optimism was studied in a sample of 175 students using the two-question measure. Valence was manipulated to be positive, i.e., outcome was desirable, or negative, i.e., outcome was undesirable, by 'framing' the same event appropriately. Unrealistic optimism was greater for negative than positive valence. The effect was of the same direction and magnitude as that found by Gold and Martyn (2003) using the single-question measure. The relationship between valence and unrealistic optimism does not depend on whether unrealistic optimism is assessed with one or two questions.

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Individuals typically believe that they are less likely than the average person to experience negative events. Such “unrealistic optimism” (UO) has been assessed in two ways: directly (via a single question, requiring comparison of own risk to that of the average person) and indirectly (via separate questions about own risk and that of the average person). The study examined the equivalence of the direct and indirect measures of female students' UO for unwanted pregnancy. Participants (N = 120) answered questions about their own risk, that of the average female student, and their own risk relative to that of the average female student; responses and response times were recorded. There was only a moderate association between direct- and indirect-UO. Direct-UO was strongly associated with estimate of own risk, but only moderately associated with estimate of the average student's risk. Response times for the comparative risk and own risk questions did not differ, but participants took significantly longer to answer the question about average student's risk. The results suggest that the two measures of UO are not equivalent, but, rather, that individuals answering a comparative risk question focus mainly on their own risk, at the expense of that of the average person.

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Unrealistic optimism is often assessed using a single question asking for an estimate of comparative risk. However, it has been proposed that individuals treat such a question essentially as though it were only about their own risk. This proposal leads to the prediction that, when the questions about own risk and comparative risk are asked in sequence, the correlation between the resulting estimates should be lower if the question about own risk comes first than if the question about comparative risk comes first. This prediction was tested using a student sample (N=68). Participants answered the two types of question in sequence, with order of presentation being counterbalanced. Results were in accord with the prediction. Possible reasons are advanced for individuals' answering questions about comparative risk as if the questions concerned their own risk.

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People tend to believe that their chance of experiencing undesirable events is lower and their chance of experiencing desirable events is higher than that of the average person like them. Two explanatory models of such 'unrealistic optimism' (UO) have been proposed: While the motivational account holds that UO serves the function of bringing comfort, the cognitive account holds that UO serves no particular function, being simply a by-product of normal cognitive strategies. UO for HIV infection was studied in samples of uninfected students (Study 1, n = 68) and gay men (Study 2, n = 63). In each case, participants rated either their relative likelihood of becoming infected (negative valence condition) or their relative likelihood of remaining uninfected (positive valence condition). As predicted, in Study 1 UO was greater where valence was negative and in Study 2 valence had no effect. The findings suggest that the students' UO is better explained by the motivational account, while the gay men's UO is better explained by the cognitive account. Implications for AIDS education are discussed.