1. A psychology teacher wanted to investigate the study habits of sixth-form students as they prepared for their mock exams. She was particularly interested in whether students revised differently when working on their own compared to revising in groups.

The teacher asked 12 students from her school to keep a revision log for two weeks. Each day, they recorded how long they had studied for, whether they had revised alone or with others and what revision techniques they had used.

After looking over the revision logs, the teacher gave the same students a questionnaire to find out how motivated or stressed they felt during their revision.

The teacher wanted to check the reliability of her content analysis.

Explain how she could assess the reliability of the content analysis in this study.