The biasing effects of a pretest on subsequent post-test results were investigated in two experimental studies. In general, the results argue for using designs without pretests. (Author/JKS)

Discusses an ethical dilemma that emerged in a study with bereaved college students. The instruments used to gather data clearly elicited grief-related distress, and more bereaved students in control groups left the study than did participants in social support groups. Three alternatives to a traditional control-group design are discussed for…

A statistical technique is presented for developing performance standards based on benchmark groups. The benchmark groups are selected using a multivariate technique that relies on a squared Euclidean distance method. For each observation unit (a school district in the example), a unique comparison group is selected. (SLD)

Studied prior knowledge as a mediator of effectiveness of the elaborative interrogation strategy for 50 male and 50 female undergraduates in a learning task. The elaborative interpretation group had significantly greater matching scores on an associative memory test for animal information than the control group only for familiar animals. (SLD)

This commentary finds that the study reported in EC 605 442, which indicated long-term gains for children with autism who experienced intensive behavioral intervention as preschoolers, is reliable, correct, and important. The commentary supports the use of quasi-random assignment to experimental or control group when truly random assignment is not…

The use of case-control methodology as an applied policy/planning research tool in assessing the potential effectiveness of behavioral interventions is studied in connection with diarrhea control in Zaire. Results with 107 matched pairs of children demonstrate the importance of hygiene-related knowledge and the utility of the research approach.…

Examined stability of young children's behavior problems and effectiveness of Parent-Child Interaction Therapy in 32 families. Found no significant differences between waitlist-control and treatment groups at time of referral on Child Behavior Checklist, Eyberg Child Behavior Inventory, and Parenting Stress Index. Behavior of treatment group…

Focuses on understanding the mechanisms that underlie the production of homophone confusions in writing. The article overviews five experiments demonstrating that the homophone effect can be experimentally induced in French adults. Findings are interpreted in the framework of an activation model. (45 references) (Author/CK)

Studied orienting and self-judging as study and problem-solving activities with 47 college freshmen and two control groups of 47 each. Results show that the intervention group, taught these learning tools, had more knowledge about orienting and self-judging and used these skills better. Both metaknowledge and transfer behavior were positively…

This study compares the effectiveness of two forms of a knowledge mobilization task on preservice elementary teachers' (n = 65) performance in solving a triangle fraction problem. The study then identifies the source of the successful solutions by linking solutions to earlier activities. One group worked with the triangle fraction task…

Kidskin was a sun-protection intervention study involving 1776 children attending 33 primary schools in Perth, Western Australia. There were three study groups: a control group, a moderate intervention group and a high intervention group. In addition to receiving a specially designed curricular intervention (1995-1998), the moderate and high…

This study aimed to find out whether integrating accent reduction software in advanced English language classes at the university level would result in improvements in students pronunciation at the segmental and sup-rasegmental levels. The study made use of a quasi-experimental research design. Two classes at the Department of Foreign Language…

In this study, students and their teachers participated in a layered approach to reading intervention in kindergarten through third grade that included professional development for teachers in scientifically based reading instruction, ongoing measurement of reading progress, and additional small-group or individual instruction for students whose…

This article explores selected phonological measures, their relationships to one another, and how groups differentiated by such measures change over time during intervention. Relationships among global quantitative measures of severity (percent consonants correct), measures of variability/consistency, and measures of whole-word complexity and…

This study compared the efficacy of two decoding skill-based programs, one based on explicit orthographic rime and one on grapheme--phoneme correspondences, to a control group exposed to an implicit phonics program. Children in both explicit decoding programs performed consistently better than the control group in the accuracy with which they read…