The document discusses various types of research studies and common problems in research reporting. It describes basic and applied research, as well as animal studies, case studies, clinical trials, correlational studies, cross-sectional surveys, epidemiological studies, experimental studies, literature reviews, longitudinal studies, meta-analyses, and problems that can occur in writing research proposals and reports. Common issues include plagiarism, poor formatting, weak structure of sentences, and improperly organizing the different sections of a research report.