MJ is FREQUENTLY argued that questionnaires and interviews are not well suited for the study of human attitudes and behavior because they elicit unreliable and biased self-reports. One source of this criticism is that judgments required of respondents are often too abstract. The result of posing vague questions is that each respondent will answer in terms of his own mental picture of the task before him.The obvious solution is to make the stimulus presented to the respondent as concrete and detailed as possible. Such a stimulus would more closely approximate a real-life decision-making or judgmentmaking situation. Furthermore, by holding the stimulus constant over a heterogeneous respondent population, the survey researcher gains a degree of uniformity and control over the stimulus situation approximating that achieved by researchers using experimental designs. The "vignette" is proposed as a means of doing this (Nosanchuk, 1972;Rossi et al. 1974).Abstract The use of vignettes-systematically elaborated descriptions of concrete situations-is supported as a means of producing more valid and more reliable measures of respondent opinion than the "simpler" abstract questions more typical of opinion surveys. The fractional replication experimental design described here enables a wide range of situation characteristics to be included and varied in the presentations made to various respondents while minimizing the number of different vignette versions required for the research instrument. Results from a study of police and nurse reactions to crime victims are shown as an

As computer technology becomes increasingly prevalent throughout society, concerns have been raised about an emerging "digital divide" between those children who are benefitting and those who are being left behind. This article presents results from new analyses of national survey data describing children's differential access to computers in school and at home, and the varying conditions that affect how children experience computers. For example, responses from a nationwide survey of teachers suggest that, as of 1998, more than 75% of students had access to computers at school. In fact, those teaching lower-income students reported weekly use of computers more often than those teaching higher-income students. But the nature of children's experiences using computers in school varied greatly by subject and teacher objectives, and the data suggest that lower-income students use computers more often for repetitive practice, whereas higher-income students use computers more often for more sophisticated, intellectually complex applications. Differences between low-income and high-income children's access to home computers were far less subtle. Survey data indicate that only about 22% of children in families with annual incomes of less than $20,000 had access to a home computer, compared to 91% of those in families with annual incomes of more than $75,000. And among children with access, those in low-income families were reported to use the computer less than those in high-income families, perhaps because most low-income families with computers lacked a connection to the Internet. The two most predictive factors of children's use of home computers were the child's age and the computer's capabilities. The author concludes that home access to computers will be a continued area of inequality in American society, and that schools must play a critical role in ensuring equal opportunity for less-advantaged children to access the benefits of the more intellectually powerful uses of computer technology.

Cuban (1986; 2000) has argued that computers are largely incompatible with the requirements of teaching, and that, for the most part, teachers will continue to reject their use as instruments of student work during class. Using data from a nationally representative survey of 4th through 12th grade teachers, this paper demonstrates that although Cuban correctly characterizes frequent use of computers in academic subject classes as a teaching practice of a small and distinct minority, certain conditions make a big difference in the likelihood of a teacher having her students use computers frequently during class time. In particular, academic subject-matter teachers who have at least five computers present in their classroom, who have at least average levels of technical expertise in their use, and who are in the top quartile on a reliable and extensive measure of constructivist teaching philosophy are very likely to have students make regular use of computers during class. More than 3/4 of such teachers have students use word processing programs regularly during class and a majority are regular users of at least one other type of software besides skill-based games. In addition, other factors-such as an orientation towards depth rather than breadth in their teaching(perhaps caused by limited pressures to cover large amounts of content) and block scheduling structures that provide for long class periods-are also associated with greater use of computers by students during class. Finally, the paper provides evidence that certain approaches to using computers result in students taking greater initiative in using computers outside of class time-approaches consistent with a constructivist teaching philosophy, rather than a standards- based, accountability-oriented approach to teaching. Thus, despite their clear minority status as a primary resource in academic subject classroom teaching, computers are playing a major role in at least one major direction of current instructional reform efforts.

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