Abstract  


Crowhurst, M. (1991). Interrelationships Between Reading and Writing Persuasive Discourse. Research in the Teaching of English, 25 (3),
    314-335.

Introduction
This study examined students' poor performance in the writing of persuasive discourse and the reading-writing relationship. The study's purpose was to determine whether the writing of persuasive discourse could be improved by instruction and the effect of reading on writing and of writing on reading within the mode of persuasion. The study investigated three questions: (1) Can sixth graders' ability to write persuasion be improved by instruction?, (2) Will instruction and practice reading persuasive discourse improve the writing of persuasion ? and, (3) Will instruction and practice of writing persuasive discourse improve the reading of persuasion?

Method
This study involved 100 students in two sixth grade classes. The students were randomly divided to four groups (25 per group): 1) the writing group: instruction in persuasive writing plus persuasive writing practice; (2) the reading group: instruction in persuasive writing plus guided reading of persuasive literature that focused on content and structure; (3) the single-lesson group: reading novels and writing book reports plus one lesson in persuasive writing without practice in either reading or writing persuasive discourse, and (4) the control group: reading novels and writing book reports. Instruction was administered for 45 minutes twice a week over a five-week period to the reading and writing groups and one 45-minute lesson to the single-lesson group.  One reading and two writing pretests and posttests were conducted the week before and after the instructional period. The reading tests involved writing a recall of what could be remembered after reading.  The reading tests were scored on (1) number of propositions (idea units) recalled, and (2) evaluation of the recalled propositions in relation to content (compared to the original text), organization, and general persuasiveness.   The writing tests involved writing two persuasive compositions.    The written compositions were scored on (1) the overall quality which included content, organization and structure, expression, and sentence structure; (2) the organization of the compositions; and (3) the structural elements which included reasons, elaborations of reasons, conclusions, test markers (such as “first”), and the total number of words. 

Results
The reading and writing scores were analyzed using a multivariate analysis of variance (MANOVA).  The results of the reading tests revealed no differences among groups for either the number of propositions recalled or evaluation of recalled propositions.  The results on the pretest of the overall quality of the writing revealed that the writing group and single-lesson group scored higher than the control group. However, the results from the posttest, the writing group, the reading group, and the single-lesson group scored significantly higher than the control group.  The results on the pretest of the organization of the written compositions revealed that the writing group scored higher than the control group. But on the posttest, the writing group and the reading group scored significantly higher than the single-lesson group and control group.  The results on the pretest of the structural elements of the written compositions presented no significant differences in any of the groups; yet, on the posttest both the writing and reading groups scored significantly higher than the control group. In addition, the presentation of the model of persuasion alone, as in the single-lesson group, resulted in no successful improvement in the written compositions.

Discussion
In addressing the three research questions, the first concerning the teachability of persuasive writing, the study found that both the writing group and reading group improved significantly on the writing quality from pretest to posttest compared to the control group. Since there were no initial differences between the reading group and writing group compared to the control group in the pretest, the posttest differences must be attributed to instruction in persuasive discourse. Even though the single-lesson group scored significantly higher than the control group on the posttests; the differences were being contributed to pre-existing abilities and not to instruction.  The persuasive writing improvement in the reading group and writing group revealed longer compositions, more conclusions and text markers, more elaboration on content, and better overall organization compared to the control group.  The second question concerning reading persuasive discourse to improve writing, the study found a significant improvement in the writing quality, organization, use of conclusion and text markers, and elaboration of writing in the reading group compared to the writing group and control group.  The single-lesson group did not show any improvement in the writing quality from pretest to posttest.  The third question concerning writing persuasive discourse to improve reading, the study found no support for the reading/writing relationship.  In conclusion, the reading group's reading of persuasive discourse played a significant role in the improvement of writing and the instruction of the persuasive model helped in the development of a schema for persuasion which were evident in the students' written compositions. 

The study's results reveals important implications for more research in the reading/writing connection.  The fact that students transferred knowledge gained in reading and instruction in persuasive writing led to significant improvements in writing compositions should be taken as evidence for the more general idea that reading affects writing.  If the effect of reading upon writing is to be demonstrated, then other related studies need to be conducted to contribute to the support of the relationship of reading/writing.

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