Presents a method for determining the number of days on which questions must be counted in order to achieve a given precision and confidence in reference statistics. (Author/PF)

The procedures involve a planned data gathering strategy consisting of at least two different groups, each receiving two different test batteries. A combination of Tucker's interbattery technique and congruence measures was the recommended strategy. Limitations of the concept of factor invariance are briefly discussed. (Author/BJG)

A reliable description of the person who writes media letters to newspapers and broadcast stations can be compiled from a combination of telephone and mail data less expensively than attempting to locate these letter writers through a random sample. (Author/JEG)

Offers suggestions to student pollsters regarding three aspects of the polling process: sampling, constructing the questionnaire, and reporting results. (GW)

A formula for determining sample size, which originally appeared in 1960, has lacked a table for easy reference. This article supplies a graph of the function and a table of values which permits easy determination of the size of sample needed to be representative of a given population. (DG)

Risks of life on the street caused by inclement weather, harassment, and assault threaten the unsheltered homeless population. We address some challenges of enumerating the street homeless population by testing a novel capture-recapture (CR) estimation approach that models individuals' intermittent daytime visibility. We tested walking and…

This handbook is intended to help educational evaluators use still photography in designing, conducting, and reporting evaluations of educational programs. It describes techniques for using a visual documentary approach to program evaluation that features data collected with a camera. The emphasis is on the aspects of educational evaluation…

The position of the "purists" who insist on limiting data to ordinal analysis is contrasted with the "pragmatists" who treat data as interval. (Author)

In a study of teacher role, the collection of data from a sample of teachers in the United States, Britain, Australia, and New Zealand is described, and the techniques used to analyze the data are discussed. (DB)

This research note examines respondent-nonrespondent bias in a statewide population survey. The findings indicate general support for using master lists in the selection of respondents for participation in a large mail questionnaire survey. Two papers follow which react to this information. (Author/CT)

This study demonstrates that multiple matrix sampling procedures can be used to collect assessment data efficiently, unabstrusively, and reliably. (MB)

Describes a school project to choose a mascot in which students learned about sampling and polls while collecting, organizing, and analyzing data. (MKR)

This poem, with stanzas in limerick form, refers humorously to the many threats to validity posed by problems in research design, including problems of sample selection, data collection, and data analysis. (SLD)

This study examined the representativeness of a time-sampling observational procedure to evaluate students with behavior disorders by examining error in samples of varying size in comparison to a criterion measure. Analyses of both single subject and multiple subject designs suggested that samples of 16 to 20 observational sessions of eight-minute…

Limiting data collection to a sample group is one way to increase effectiveness in dealing with data. The paper describes how to draw a sample group (random sampling, stratified random sampling, purposeful sampling, and convenient or opportunity sampling) and discusses how to determine the size of the sample group. (SM)