Research shows that writing motivation decreases throughout schooling and predicts writing performance. However, this evidence comes primarily from cross-sectional studies. Here, we adopted a longitudinal approach to (a) examine the development of attitudes toward writing, writing self-efficacy domains, and motives to write from Grade 6 to 7, and (b) test their longitudinal and concurrent contribution to the quality of opinion essay in Grade 7, after controlling for quality in Grade 6. For that, 112 Portuguese students completed motivation-related questionnaires and composed two opinion essays in Grade 6 and 1 year later, in Grade 7. Findings showed that, while attitudes and all motives to write declined, self-efficacy did not. Additionally, opinion essay quality in Grade 7 was associated with essay quality in Grade 6 as well as with self-efficacy for self-regulation and intrinsic motives in Grade 7. In other words, current motivational beliefs seem more important to students’ writing quality than their past beliefs. This conclusion means that, in order to fostering students’ writing performance, middle-grade teachers should nurture their positive beliefs about writing by placing a higher value on writing motivation in the classroom.

A growing body of scholarship in the field of writing research from a cognitive perspective suggests that girls tend to outperform boys in particular writing tasks. Still, our understanding about gender differences continues to evolve. The present study specifically focused on gender differences in writing between students from Grade 4 to Grade 9. We examined differences in handwriting and self-efficacy, as well as in three measures of written composition across two genres (viz., spelling, text length, and text quality in stories and opinion essays). Moreover, we tested whether there were differences in written composition above and beyond handwriting and self-efficacy. Findings suggest that girls consistently outperformed boys in handwriting, self-efficacy, spelling, text length, and text quality. These effects were moderated by neither students’ grade nor text genre. In addition, after accounting for handwriting and self-efficacy, females still performed better than males in the three measures of written composition. Overall, findings confirmed the gender difference typically found in writing and indicated that potential explanatory variables for it may be handwriting and self-efficacy.

It is established that transcription skills (handwriting and spelling) constrain children’s writing. Yet, little is known about the mechanism underlying this relationship. This study examined the mediating role of bursts and pauses on the link between transcription skills and writing fluency or text quality. For that, 174 second graders did the alphabet task and wrote a story using HandSpy. Path analyses indicated that writing fluency and text quality models were excellent descriptions of the data, with 80% and 46% of explained variance, respectively. Results showed that handwriting and spelling influenced writing fluency only indirectly via burst length and short pauses duration (full mediation); and that whereas only handwriting contributed to text quality directly, both handwriting and spelling contributed to text quality indirectly, via burst length (partial mediation). These findings suggest that better transcription skills allow students to write more words without pausing, which in turn results in more fluent and better writing.