essays

This study looked at the effects of two forms of written corrective feedback on lexico-grammatical accuracy in the academic writing of English as a foreign language university students. It had a 3x4 within-by-between design with three groups (two treatment and one control) measured over four occasions (pretest/treatment, treatment, posttest, delayed posttest).

datasets

A collection of robust statistical methods based on Wilcox' WRS functions. It implements robust t-tests (independent and dependent samples), robust ANOVA (including between-within subject designs), quantile ANOVA, robust correlation, robust mediation, and nonparametric ANCOVA models based on robust location measures.

Patrick Mair

WRS2

A Collection of Robust Statistical Methods

Rand Wilcox

Indrajeet Patil

essays function

A data frame with 4 variables and 120 observations:<dl>
 <dt><code>id</code></dt>
<dd>participant ID</dd> <dt><code>group</code></dt>
<dd>control, direct, indirect</dd> <dt><code>essay</code></dt>
<dd>four measurement occasions</dd> <dt><code>errorRatio</code></dt>
<dd>error ratio</dd> 
</dl>

Format

Academic Writing Data — essays

A data frame with 4 variables and 120 observations:<dl>
 <dt><code>id</code></dt>
<dd>participant ID</dd>

 <dt><code>group</code></dt>
<dd>control, direct, indirect</dd>

 <dt><code>essay</code></dt>
<dd>four measurement occasions</dd>

 <dt><code>errorRatio</code></dt>
<dd>error ratio</dd>

 
</dl>

essays: Academic Writing Data

Description

Usage

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Examples