Characterizing Children's Intuitive Theories of Disease: The Case of Flu.

To advance the study of children's knowledge and understanding of disease, we devised a methodology for assessing key features of intuitive theories laid out by Wellman and Gelman (1998). We then assessed a disease-relevant biological ontology, causal propositions involving unobservables, and coherence in explanations of influenza offered by children aged 8 to 13. Use of disease-relevant terms and mention of propositions in a biological theory of flu causality, although not coherence or connectedness of ideas, increased with age. Measures were moderately correlated with one another and with a traditional Piagetian measure of level of disease understanding, each contributing uniquely to the characterization of children's thinking. In multiple regression analyses, scores were highest for older children, Latino/minority children, and children of more educated parents with other factors controlled. Specific gaps in children's intuitive theories are identified to guide theory-based interventions aimed at helping children understand and protect themselves from infectious diseases.

Development and Coherence of Beliefs About Disease Causality and Prevention.

Guided by a naïve theories perspective on the development of thinking about disease, this study of 188 children aged 6 to 18 examined knowledge of HIV/AIDS causality and prevention using parallel measures derived from open-ended and structured interviews. Knowledge of both risk factors and prevention rules, as well as conceptual understanding of AIDS causality, increased with age. Younger children displayed more advanced knowledge in response to structured questions than in response to open-ended questions. Contrary to hypothesis, knowledge of causality was not more advanced than knowledge of prevention in elementary school. Moreover, correlations between the two types of knowledge were often nonsignificant except when the same method was used to assess both. Thus, methodology matters in assessing children's knowledge of disease, children's intuitive thinking is not consistently coherent, and it may be safest to educate children explicitly about sound prevention rules rather than assume they will infer the rules themselves from information about a disease's causes.

Gender differences in preschool children's commentary on self and other.

To examine gender differences in commentary about self and others in same- and mixed-gender contexts, the authors analyzed dyadic conversations involving 78 children in 5 preschool facilities. Compared to girls talking to girls, boy talking to boys made more statements with negative connotations for others and less often pointed out self-other similarities. No gender differences were observed in mixed-gender contexts. Compared to boys talking with boys, boys talking with girls spoke more frequently of similarities and abilities. Compared to girls with girls, girls with boys less often spoke descriptively or talked of activities and possessions and more often spoke of conduct, possibly in an effort to manage boys' behavior. Overall, the findings support a social-constructivist or contextual rather than a biological perspective on early gender differences.

Rich man, poor man: developmental differences in attributions and perceptions.

In an examination guided by cognitive developmental and attribution theory of how explanations of wealth and poverty and perceptions of rich and poor people change with age and are interrelated, 6-, 10-, and 14-year-olds (N=88) were asked for their causal attributions and trait judgments concerning a rich man and a poor man. First graders, like older children, perceived the rich man as more competent than the poor man. However, they had difficulty in explaining wealth and poverty, especially poverty, and their trait perceptions were associated primarily with their attributions of wealth to job status, education, and luck. Fifth and ninth graders more clearly attributed wealth and poverty to the equity factors of ability and effort and based their trait perceptions on these attributions. Although the use of structured attribution questions revealed more understanding among young children than previous studies have suggested, the findings suggest a shift with age in the underlying bases for differential evaluation of rich and poor people from a focus on good outcomes associated with wealth (a good education and job) to a focus on personal qualities responsible for wealth (ability and effort).

Age and ethnic differences in cold weather and contagion theories of colds and flu.

Age and ethnic group differences in cold weather and contagion or germ theories of infectious disease were explored in two studies. A cold weather theory was frequently invoked to explain colds and to a lesser extent flu but became less prominent with age as children gained command of a germ theory of disease. Explanations of how contact with other people causes disease were more causally sophisticated than explanations of how cold weather causes it. Finally, Mexican American and other minority children were more likely than European American children to subscribe to cold weather theories, a difference partially but not wholly attributable to ethnic group differences in parent education. Findings support the value of an intuitive or naïve theories perspective in understanding developmental and sociocultural differences in concepts of disease and in planning health education to help both children and their parents shed misconceptions so that they can focus on effective preventive actions.

Differences between Black and White elementary school children's orientations toward alcohol and cocaine: a three-study comparison.

To trace the origins of race differences in substance use, this study examined differences between Black and White elementary school children's knowledge of alcohol and cocaine, beliefs about their short- and long-term effects, and attitudes toward and intentions to use them across three independent samples (N = 181, N = 287, N = 234). Black children were more negatively oriented toward alcohol and cocaine than White children from an early age. Most notably, in all samples Black children had less positive attitudes toward adult alcohol use and lower intentions to use alcohol. Black children were also more likely to attribute negative long-term health and social effects to alcohol and cocaine use, but there were few significant race differences in knowledge or in expectancies regarding short-term effects of use. Since race differences in beliefs, exposure to alcohol, and socioeconomic factors could not explain race differences in attitudes toward substance use, other cultural differences must be considered.

Teaching a coherent theory of drug action to elementary school children.

This study examined whether two versions of a drug and alcohol curriculum explaining how substances affect behavior and health, one version more causally coherent than the other, were more effective than a control curriculum on disease in changing school-age children's (N=327) beliefs and attitudes regarding cocaine and alcohol. Few differences were found between the two drug and alcohol curricula. Compared to children receiving the control curriculum, however, both treatment groups demonstrated greater understanding of the circulation of alcohol and cocaine throughout the body, the true long-term effects of these substances, and the stimulant effects of cocaine. Moreover, they had less positive attitudes and intentions toward cocaine. Several differences were evident at both a 3-month post-test and a 1-year follow-up, pointing to the potential value of applying an intuitive theories perspective in designing drug prevention and other health education programs.

Biological background knowledge and learning from a drug and alcohol education program.

The authors asked whether having a base of relevant biological knowledge put school children in a better position to understand the effects of alcohol and cocaine and to learn about these effects when exposed to a curriculum presenting a physiological theory of drug action. Participants were 337 ethnically diverse 3rd- through 6th-grade students who were pretested, trained, and posttested. Multiple regression analyses revealed that knowledge of the basic functions of the heart, blood, and brain predicted certain drug-knowledge variables. Students with greater biological background knowledge also learned more from instruction, a finding with implications for enhancing drug and other health education programs.

Age differences in alcohol and cocaine expectancies and attitudes.

Positive and negative expectancies regarding the behavioral effects of alcohol and cocaine were assessed and used to predict attitudes toward their use across four age groups (5-7, 8-10, 11-14, and 18-25, N = 121). Regardless of gender and minority status, children and early adolescents appeared to overgeneralize their beliefs about alcohol to a less familiar drug, cocaine, perceiving the effects of the two drugs similarly. Only college students differentiated between drugs, perceiving cocaine as less likely than alcohol to produce drunkenness and more likely to have stimulant and elation/empowerment effects. With age and other expectancies controlled, expectancy of drunkenness was the best predictor of disapproval of alcohol use; attitudes toward cocaine use were unrelated to expectancies but became more negative with age. Drug prevention programs should rest on data regarding children's preexisting beliefs about the consequences of drug use and should help them understand that different drugs (for example, stimulants and depressants) pose different dangers.