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Educational Measurement and Statistics
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Statistical Consulting Unit
Wham 229
Phone: 618-453-6900/6933
E-Mail:
zagzhang@siu.edu or
rickrobe@siu.edu
- The Statistical Consulting Unit (SCU) in the department Educational
Psychology and Special Education (EPSE) is a statistical consulting
service primarily available to students who are taking, or have taken
statistics courses in EPSE, and to faculty in the College of Education
and Human Services (COEHS).
- The SCU provides statistical advice and assistance with short- term
statistical analysis to students, researchers and faculty. This includes
assistance with designing experiments, studies and surveys, as well
as analyzing data, related to master's theses, doctoral dissertations,
and faculty research.
- The SCU seeks to develop collaborative research efforts and promote cross-disciplinary interaction between COE faculty and students, as well as their counterparts in other disciplines.
- samples of questionnaires or any forms used for data collection
- some or all of the raw data (if possible)
- research questions or relevant portions of proposal or prospectus
- copies of any preliminary descriptive analyses of your data, including graphics (scatterplots, histograms, etc.)
Who may use this service?
SCU services are available to faculty, students and researchers in the COEHS and to students who are currently enrolled or have previously taken statistics courses in EPSE.
How do I arrange an appointment?
The SCU assistance schedule is posted outside Wham 229, the location of the SCU. For an appointment, call the SCU at 453-6900/6933, or call the Educational Psychology & Special Education Department at 536-7763.
What should I bring to the appointment?
The majority of the initial appointment is typically spent describing (in non-statistical terms) your project/research to the statistician and the particular aspects with which you may need assistance. Please bring the following materials to your first consulting session:
What to expect?
Appointments are scheduled to last an hour (although many appointments use only a portion of that time) and are held in the SCU (Wham 229). Most clients will require more than a single appointment since statistical consulting is an iterative process.
Policies of the Statistical Consulting Unit: The following policies
relate to the types and limits of assistance clients may expect to receive
in the SCU.
- A maximum of three (3) hours of consultation will be provided by the consulting personnel per client per calendar year (a client's calendar year begins with the first appointment).
- Consultation will be on an appointment basis only.
- Levels of statistical computing assistance are limited to the following:
- For clients who have not yet completed EPSY 402 or EPSY 506, assistance will be provided only for description of data. For Example: Frequency Counts, Percentages and Histograms.
- For clients with EPSY 402 or the equivalent, assistance will be provided in using and interpreting descriptive statistics, simple linear regression, t-test, chi-square, and one-way ANOVA.
- For clients with EPSY 506 or the equivalent, assistance will be provided along the lines of (b) above, in addition to post-hoc and planned comparisons.
- For clients with EPSY 507 or the equivalent, assistance will be provided along the lines of (c) above, plus multiple regression with categorical or continuous variables, factorial ANOVA, curve fitting and repeated measures.
- It is assumed that all clients know how to use at least one statistical computing package such as SAS or SPSS. All clients will be responsible for running their own computer jobs, even though a considerable amount of programming assistance may be provided by the SCU.
- Levels of statistical design assistance are limited to the following:
- Advice on experimental design.
- Advice on preparation of data.
- Advice regarding use of Unix statistical software packages.
- Interpretation of computer output.
- Measurement and Statistical computing packages available in the SCU include:
| a. | SAS 9.1 | i. | PARSCALE 4.1 |
| b. | SPSS 14 | j. | BILOGMG 3.0 |
| c. | LISREL 8.72 | k. | TESTFACT 4.1 |
| d. | Mathematica 5.2 | l. | Multilog 7.03 |
| e. | Amos 6 | m. | Assessment Systems |
| f. | Minitab 14 | n. | HLM 6.02 |
| g. | R 2.2.1 | o. | G Power |
| h. | S-Plus 7.0 | p. | Fortran Power Station 4.0 |
NOTE: The Statistical Consulting Unit is NOT a tutoring service.
SCU Coordinator:
Dr. Ernest L. Lewis
(618) 536-7763