MANOVA/MANCOVA
A researcher is comparing the ability to perform different reading/writing abilities. Thedatasetcontains four dependent variables: reading comprehension, copy word, composition, and write word. The independent variable is ability (1=low, 2=medium and 3=high). Raven refers to Raven Standard Progression Matrices (similar to an IQ test, which was used to conduct the pretest).
*Please refer toSPSS Commandsfor tips on analyzing data.
Your task:
1) State the research hypotheses.
2) Perform MANOVA for this data set.
- Does this meet the assumption of Homoscedasticity? Explain.
- Are there significant differences between individuals in the three groups (i.e., low, medium, and high ability) with respect to their reading comprehension, ability to copy words, composition, and writing words? Provide support.
3) Perform a MANCOVA for this data set. Include the Raven test as covariate.
- Describe the results, including pertinent tables.
- Compare these results with the MANOVA test. Explain any differences.
Assignment Expectations
Length: Case assignments should be at least 3 pages (750 words) in length excluding tables.
References: Any references used should be from academic sources and cited using APA format.
Organization: Subheadings should be used to organize your paper according to question.
Format: This assignment should be written in a scientific format (as in the "Results" section of a peer-reviewed study). APA format is required for all assignments at the PhD level. Refer to the following guidelines in presenting tables and results in APA format: 1.APA Table Guidelines, 2.Reporting Results. See Syllabus page for more information on APA format.