dat.bangertdrowns2004 {metadat}R Documentation

Studies on the Effectiveness of Writing-to-Learn Interventions

Description

Results from 48 studies on the effectiveness of school-based writing-to-learn interventions on academic achievement.

Usage

dat.bangertdrowns2004

Format

The data frame contains the following columns:

id numeric study number
author character study author(s)
year numeric publication year
grade numeric grade level (1 = elementary; 2 = middle; 3 = high-school; 4 = college)
length numeric treatment length (in weeks)
minutes numeric minutes per assignment
wic numeric writing tasks were completed in class (0 = no; 1 = yes)
feedback numeric feedback on writing was provided (0 = no; 1 = yes)
info numeric writing contained informational components (0 = no; 1 = yes)
pers numeric writing contained personal components (0 = no; 1 = yes)
imag numeric writing contained imaginative components (0 = no; 1 = yes)
meta numeric prompts for metacognitive reflection (0 = no; 1 = yes)
subject character subject matter
ni numeric total sample size of the study
yi numeric standardized mean difference
vi numeric corresponding sampling variance

Details

In each of the studies included in this meta-analysis, an experimental group (i.e., a group of students that received instruction with increased emphasis on writing tasks) was compared against a control group (i.e., a group of students that received conventional instruction) with respect to some content-related measure of academic achievement (e.g., final grade, an exam/quiz/test score). The outcome measure for this meta-analysis was the standardized mean difference (with positive values indicating a higher mean level of academic achievement in the intervention group).

The standardized mean differences given here are bias-corrected and therefore differ slightly from the values reported in the article. Also, since only the total sample size is given in the article, the sampling variances were computed under the assumption that \(n_{i1} = n_{i2} = n_i / 2\).

Concepts

education, standardized mean differences, meta-regression

Author(s)

Wolfgang Viechtbauer, wvb@metafor-project.org, https://www.metafor-project.org

Source

Bangert-Drowns, R. L., Hurley, M. M., & Wilkinson, B. (2004). The effects of school-based writing-to-learn interventions on academic achievement: A meta-analysis. Review of Educational Research, 74(1), 29–58. ⁠https://doi.org/10.3102/00346543074001029⁠

Examples

### copy data into 'dat' and examine data
dat <- dat.bangertdrowns2004
dat[1:10,-13]

## Not run: 

### load metafor package
library(metafor)

### fit random-effects model
res <- rma(yi, vi, data=dat)
res

### some examples of mixed-effects meta-regression models
res <- rma(yi, vi, mods = ~ factor(grade), data=dat)
res
res <- rma(yi, vi, mods = ~ length, data=dat)
res
res <- rma(yi, vi, mods = ~ info + pers + imag + meta, data=dat)
res


## End(Not run)

[Package metadat version 1.2-0 Index]