The point of departure of this study is the well-known hypothesis according to which structures that involve the syntax-pragmatics interface and instantiate a surface overlap between two languages are more vulnerable to crosslinguistic influence than purely syntactic domains (e.g. Muller and Hulk, 2001). In exploring the validity of this…

This study examines the differential effect of two types of written corrective feedback (CF) and the extent to which language analytic ability mediates the effects of CF on the acquisition of articles by adult intermediate ESL learners of various L1 backgrounds (N = 91). Three groups were formed: a "direct-only correction" group, a "direct…

This study investigates the effect of a CALL application designed to enhance speaking and listening in Mandarin Chinese on advanced students' verbal skills, learning attitudes, and self-efficacy. A pretest/posttest experimental/control-group design with intact classes was employed to minimize treatment diffusion. Over the course of 14 weeks,…

This study examined critical thinking instruction in a required introductory communication course (N = 324). Experimental group participants received enhanced instruction using various active learning strategies, activities, and assignments. Results indicate significant improvement in their critical thinking skills. Implications for pedagogy and…

Background: This study aimed to evaluate the effectiveness of the Parents Plus programme with families of pre-school children with developmental disabilities and significant behavioural problems in the Irish health service. The Parents Plus programme is a group-based parent training package involving video modelling, which was designed to be…

Objectives: To assess the impact of a voluntary, paraprofessional home visiting program on promoting child health and development and maternal parenting knowledge, attitudes, and behaviors. Methods: This collaborative, experimental study of 6 Healthy Families Alaska (HFAK) programs enrolled 325 families from 1/00 to 7/01, randomly assigned them to…

This longitudinal case-study aimed at examining whether purposely teaching for the promotion of higher order thinking skills enhances students' critical thinking (CT), within the framework of science education. Within a pre-, post-, and post-post experimental design, high school students, were divided into three research groups. The experimental…

This study examined the effect of scaffolding learning components in a computerized environment, for students solving qualitative science problems in a simulation of laboratory experiments. Four scaffolding components were identified (structural, reflective, subject-matter and enrichment) and used in different configurations to construct four…

Group parent-training interventions for the treatment and prevention of externalizing problems in young children have been empirically validated almost exclusively with mother-only groups or with groups where the majority of participants are mothers. One reason for this focus has been the difficulty in attracting fathers to parent-training groups.…

A persistent problem in the evaluation of field-based projects is the lack of no-treatment comparison groups. Frequently, potential comparison groups are confounded by socioeconomic, racial, or other factors. Among the possible methods for dealing with this problem are various matching procedures, but they are cumbersome to use with multiple…

A relationship between experimental and statistical controls is considered in an effort to show how this relationship affects the power of an experiment. Statistical rather than experimental controls are often used to reduce the effect of subjects at the extremes of individual difference. This results in attrition of actual experimental subjects.…

The purpose of the study was to determine whether higher shorthand speeds were achieved by high school students in a 1-year shorthand course through the use of Simplified Gregg Shorthand or through the use of Diamond Jubilee (DJ) Gregg Shorthand. The control group consisted of 75 students enrolled in Simplified Shorthand during the years…

In a public school setting administrators are frequently under local pressure to make a new project service available to all eligible children. However, comparable control groups for project evaluation are often absent, and although random assignment to treatment groups remains the most systematic method of providing controls, this is not often…

The relationship of speech training to the written English of selected Negro students using substandard English in an elementary school was investigated. The limitations to the study are: (1) The elementary school is a small rural school with an enrollment of about 500 white and 80 Negro students; (2) The school has only one part-time speech…

The quality of research on groups has been notoriously poor. This article is an attempt to respond to the research and evaluation deficit by providing some methodological approaches that might encourage group researchers and practitioners to attempt high quality research. (Author)