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This course is the second of two courses in the statistics and research methods sequence. This course includes use of statistical methods within the context of experimental research. Emphasis includes reading and evaluation of research articles, written summaries of statistical analyses, proposing and conducting experimental research, and APA-style research reports. Use of statistical computer software is integrated throughout the course. Topics include hypothesis testing, one-and two-way analysis of variance, multiple-comparison tests, power analysis, effect size, and several research designs: randomized groups, within-subjects, and mixed factorial. A student-designed project will include research design, data collection, statistical analysis, preparation of a research report, and a formal presentation. Students must enroll in PS 345 the semester immediately following PS 325. To be taken with student's PS325 professor. Prerequisite: PS 101 and PS 325 (with a letter grade of at least a C). (Offered spring semester).