On the psychology of time preference and human decisions: introduction to the special issue.
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Choice Behavior↗
Biomedical subjects
J van der Pligt
Publications and source records attributed to J van der Pligt.
Time is on my side: optimism in intertemporal choice.
The present research examines the role of optimism on time preferences for both losses and gains. It is argued that optimism has asymmetric effects on time preferences for gains versus losses: one reason why decision makers prefer immediate gains is because they are optimistic that these gains will be followed by additional gains in future. In contrast, decision makers prefer to delay losses because they are optimistic that losses are avoidable in the future. Optimism about outcomes affects time preferences for both gains and losses, such that low optimism reduces the discount rates while increased optimism is associated with higher discount rates. This prediction was supported in two different domains: monetary outcomes (Study 1), and health (Study 2). Implications of these results for both research practice and time preferences in the real world are discussed.
Analysis of Variance↗
Meaning-seeking in the illusory correlation paradigm: the active role of participants in the categorization process.
The present research examines the role of categorical perception (McGarty, Haslam, Turner, & Oakes, 1993) in the illusory correlation paradigm. This approach assumes that the search for meaningful differences between two stimulus groups can lead to the illusory correlation effect. This explanation is investigated in Study 1 by presenting participants with constrained stimulus information and examining whether accentuating evaluative differences between stimuli could provide a basis for illusory correlation. Results of this study (N = 64) revealed illusory correlation effects that were related to evaluative reinterpretations of the stimuli. Study 2 (N = 19) focused on the causal relation between illusory correlation and accentuation effects, using the thinking-aloud technique. Detailed analyses of each participants' behaviour indicated that illusory correlation can arise from actively seeking intergroup differences and that reinterpretations of stimuli and the perception of illusory correlation were mutually reinforcing. Implications of these results for stereotyping processes are discussed.
Adult↗
Attributions of responsibility and affective reactions to decision outcomes.
Immediate affective reactions to outcomes are more intense following decisions to act than following decisions not to act. This finding holds for both positive and negative outcomes. We relate this "actor-effect" to attribution theory and argue that decision makers are seen as more responsible for outcomes when these are the result of a decision to act as compared to a decision not to act. Experiment 1 (N = 80) tests the main assumption underlying our reasoning and shows that affective reactions to decision outcomes are indeed more intense when the decision maker is seen as more responsible. Experiment 2 (N = 40) tests whether the actor effect can be predicted on the basis of differential attributions following action and inaction. Participants read vignettes in which active and passive actors obtained a positive or negative outcome. Action resulted in more intense affect than inaction, and positive outcomes resulted in more intense affect than negative outcomes. Experiment 2 further shows that responsibility attributions and affective reactions to outcomes are highly correlated; that is, more extreme affective reactions are associated with more internal attributions. We discuss the implications for research on post-decisional reactions.
Adult↗
The structure of attitudes: attribute importance, accessibility and judgment.
Two studies related attribute importance to accessibility and speed of judgment. Attitudes were assessed by a direct attitude measure and a modal set of 15 attributes. Attributes were rated in terms of their probability and desirability. Subsequently, participants were required to select the five attributes they considered to be most important. Results of Study 1 (dealing with attitudes towards condom use) show that individually selected, important attributes are more easily retrieved and judged faster than non-selected, less important attributes. Judging attributes took less time than evaluating one's overall attitude, suggesting a bottom-up process in which the various attributes are combined to form an overall attitude. Study 2 (dealing with attitudes towards smoking) extends these findings and also addresses the stability of attitude structure. Important attributes were again associated with reduced response times, and attribute-related judgments took less time than judging one's overall attitude. Accessibility of important attributes remained stable over time as indicated by the results of a lexical decision task one week later. Finally, important attributes were also recalled better than less important attributes. Implications for research on attitude structure are discussed.
Adult↗
Understanding and valuing environmental issues: the effects of availability and anchoring on judgment.
This paper addresses the effects of availability and anchoring-and-adjustment on people's beliefs and values concerning environmental issues. The first three studies focus on lay people's perceptions of the causes of large scale environmental risks, the second series of three studies deals with how people value environmental goods and how much they are prepared to pay to mitigate environmental risks. In studies 1-3 we investigate the effects of availability and anchoring-and-adjustment on estimating the contribution of various factors to large scale environmental risks. Highly complex risks such as acid rain and global warming tend to be associated with multiple causes, and our results show that estimating the role of these causes is clearly affected by availability and anchoring-and-adjustment. Both have sizeable effects and persist over time. Moreover, corrective procedures only seem to have a limited effect. Availability and anchoring-and-adjustment not only play a role in judging the possible causes of risks; they also play a role in research attempting to assess the public's willingness to pay (WTP) to protect our environment. The outcomes of WTP surveys are often used as a tool to help policy decision making. In the second part of this article we present three studies on this issue. Results provide further evidence of the impact of the two heuristics on the outcomes of WTP research. Implications for research and practice are briefly discussed.
Acid Rain↗
Anticipated affective reactions and prevention of AIDS.
Controlling the AIDs epidemic may depend largely upon health education aimed at adolescents. A number of approaches have been applied to human immunodeficiency virus (HIV) preventive behaviour in adolescents, including the health belief model (Becker, 1974), protection motivation theory (Rogers, 1983), and the theory of planned behaviour (Ajzen, 1985, 1991). Since sexual behaviour is heavily influenced by emotions, a possible shortcoming of these models is that little attention is given to affective processes. In this study we investigated the role of anticipated, post-behavioural, affective reactions to (un)safe sexual behaviours in the context of the theory of planned behaviour (TPB). The results showed that anticipated affective reactions such as worry and regret predicted behavioural expectations over and above the components of the TPB. The implications for our understanding of adolescent sexual behaviour and for campaigns aimed at the reduction of risky sexual practices will be discussed.
Acquired Immunodeficiency Syndrome↗
Changing adolescents' sexual behaviour: perceived risk, self-efficacy and anticipated regret.
This article focuses on determinants of adolescent AIDS-related behaviour. First, we will focus on the perception of risk for AIDS and possible optimistic biases in perceived risk. The behavioural consequences of optimism or perceived invulnerability will be briefly discussed. Next, we will focus on other determinants of sexual risk behaviour, i.e. self-efficacy and anticipated regret. Gender differences in the predictive power of these factors will be discussed. Finally, we will summarize the results of a series of studies investigating the role of anticipated regret as a determinant of adolescent sexual risk behaviour. The possible contribution of stressing anticipated regret in prevention programs aiming adolescents to adopt safer sex practices will be discussed.
Acquired Immunodeficiency Syndrome↗
Perceiving AIDS-related risk: accuracy as a function of differences in actual risk.
This study investigates the perceived risk of an HIV infection. Cognitive antecedents of biases in risk perception and their effects on behavioral intentions were investigated. The purpose of this study was to determine the relative accuracy of risk assessments for samples that vary in actual risk for AIDS. Subjects were citizens of Amsterdam, heterosexuals with private partners, gay men, and heterosexuals with prostitution partners. Although optimistically biased in all samples, perceptions of risk were related to previous risk behavior in high-risk samples only. Pessimism was more pronounced in samples higher at risk. Optimists had lower levels of previous risk behavior and increased intentions to adopt safe sex practices. Ss in samples higher at risk had, therefore, relatively adequate perceptions of risk.
Acquired Immunodeficiency Syndrome↗
Limited changes in sexual behaviour of heterosexual men and women with multiple partners in The Netherlands.
To study changes in sexual behaviour, heterosexuals with multiple sexual partners were recruited through an STD-clinic and asked to return every 4 months for follow-up. Between October 1987 and June 1989, 512 heterosexuals entered the study and 140 men and 200 women had at least one follow-up visit. No changes were found between 3 visits in the kind of sexual techniques practiced. Condom use during vaginal intercourse with commercial partners (prostitutes or clients) was relatively high and remained high, but was low and remained at that level with private partners. Men and women reduced their number of private sexual partners by 50%, but the decline in the number of commercial partners was nonsignificant. Although more information is needed about the underlying social-psychological aspects of behavioural change, it seems necessary to redesign prevention activities to stress the effectiveness of condoms and to encourage condom use especially among heterosexuals with multiple private partners.
Acquired Immunodeficiency Syndrome↗
Heterosexuals at risk for HIV: differences between private and commercial partners in sexual behaviour and condom use.
To study the prevalence of HIV and other sexually transmitted diseases (STDs), sexual behaviour and condom use among heterosexuals, 193 women and 157 men entered a longitudinal study. Participants were recruited through an STD clinic, and had had five or more heterosexual partners in the preceding 6 months but had no other AIDS risk factors. Participants were divided in groups with respect to private and/or commercial sexual partners. One hundred and thirty-six (71%) women worked as prostitutes and had, on average, 115 customers a month, and 99 (63%) men had visited, on the average, eight prostitutes in the past 4 months. One hundred and seventy-one (89%) women (114 prostitutes) had had, on average, four partners, and 112 (78%) men (of whom 64 had visited prostitutes) had had, on average, seven private partners in the past 4 months. Vaginal intercourse was often or always reported by all participants whilst anal contact was seldom reported. Non-high-risk sexual techniques (for example, oro-oral, masturbation) were practised more frequently with private than with commercial partners (P less than 0.001). Although no differences were found in the frequency of practising high-risk sexual techniques (for example, vaginal, ano-genital), differences were found for frequency of condom use. Condom use during vaginal intercourse was reported more frequently with commercial than with private partners (P less than 0.01). However, if the number of partners is taken into account, prostitutes had unprotected vaginal intercourse with an estimated average number of 160 partners in 4 months, which is far more than customers (seven) and men and women with private partners only (four).(ABSTRACT TRUNCATED AT 250 WORDS)
Acquired Immunodeficiency Syndrome↗
Air pollution, annoyance and coping.
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Adaptation, Psychological↗
Trying to stop smoking: effects of perceived addiction, attributions for failure, and expectancy of success.
This paper reports the results of a postal questionnaire completed by 2343 smokers who had contacted a television company for help with stopping smoking. Of these, 1848 (78.9%) completed a follow-up questionnaire 1 year later. This indicated that 797 had tried to stop, 709 had tried to cut down, and 164 had become abstinent. Analyses show that the intention to try to stop smoking was dependent not only on the perceived health benefit, but also on the subjects' confidence that they would succeed if they tried to stop. As predicted by Weiner's [(1979). J. Educ. Psychol. 71: 3-25] model of achievement motivation, those who attributed other smokers' failures at quitting to stable factors had lower expectancies of success, as had those who saw themselves as more addicted. When the follow-up data are considered, reported attempts at quitting were strongly related to previously declared intentions, and reported abstinence was related to previous confidence (expectancy of success) and perceived addiction. There is no support for hypotheses concerning self-other differences in attribution, or defensive attribution, in subjects' attributions for their own failures at cessation. Implications for antismoking interventions are discussed.
Adult↗
Drug attitudes and discrimination between drugs among a group of English schoolchildren.
This study investigates the attitudes of a group of 185 London schoolchildren towards a number of legal and illegal drugs, and examines the ways in which they discriminate between these drugs. Heroin and LSD were seen as the most dangerous drugs, and alcohol and cigarettes as the safest. Subjects who had a negative attitude towards drugs in general regarded cannabis, amphetamines, alcohol and tobacco as more dangerous than subjects with a neutral or pro-drug attitude. There was also a sex difference: boys claimed to know more about drugs, were more likely to know a cannabis user and to have been "really drunk" than the girls. The implications of these results for drug and alcohol education programmes are discussed.
Adolescent↗