This guide is for PSYC 421 Week 3 SPSS Assignment Part 2, start to submission. Continue the SPSS analysis by assessing and interpreting the reliability and validity of a test.
PSYC 421 is Psychological Measurement, 3 credit hours, in Liberty University's BS in Psychology. Canvas and the course guide file print the code as PSYC421; it is the same course.
| Course | PSYC 421 Psychological Measurement |
|---|---|
| Module/Week | 3 |
| Points | 100 points |
| Length | Not set in the guide; follow the assignment instructions |
| Sources | The SPSS data documents and Cohen and Swerdlik |
| Faith integration | Not required by the guide |
| Format | SPSS output and written interpretation |
What PSYC 421 Week 3 SPSS Assignment Part 2 asks for
Part 2 continues the analysis of the data by assessing and interpreting the reliability and validity of a test. It is due in Module/Week 3 with Cohen and Swerdlik chapters 5 and 6 and the SPSS documents. Worth 100 points.
Where it fits in PSYC 421
In the published schedule, SPSS Assignment Part 2 is one of 8 graded written assignments in PSYC 421. It follows Week 2 SPSS Assignment Part 1 and comes before Week 4 Item Development and Analysis Worksheet.
How PSYC 421 Week 3 SPSS Assignment Part 2 is graded
Liberty grades SPSS Assignment Part 2 with the rubric attached to the assignment in Canvas, worth 100 points in the published guide. That is about 10% of the course's 1,010 points. The rubric rows are the real instructions. Draft against them, and you will rarely be surprised by the grade.
Course grades in PSYC 421 use Liberty's point scale: an A is 900 to 1010 points of the course total. Missing the length or source minimum usually costs points on several rows at once, which is why the checklist below starts with them.
Timing in the published guide: Each course week (except Module/Week 1) begins on Tuesday morning at 12:00 a.m. (ET) and ends on Monday night at 11:59 p.m. (ET). The final week ends at 11:59 p.m. (ET) on Friday. Check the due dates in your Canvas section, which govern.
The PSYC 421 Week 3 method, step by step
Set up the data before the write-up
Work through the SPSS Assignment Part 2 calculations or software steps first and save the output. The written part interprets those numbers, so they have to be right before you explain them.
Show the method
Name the method and the reason it fits. One or two sentences are enough, but they must be there.
Report the results plainly
Give the key figures in a labeled table and mention each in the text.
Interpret in the context of the question
Explain what the results mean for the decision or question in PSYC 421, in plain terms. The interpretation is where the analysis points are earned.
Name the limits
State what the analysis cannot tell you: assumptions, data limits, or what would change the answer.
Submit the files the guide asks for
Check which files Canvas expects (spreadsheet, output, written document) and that each is complete and labeled (Not set in the guide; follow the assignment instructions).
Use Analyze, Scale, Reliability Analysis for alpha and Analyze, Correlate, Bivariate for validity correlations, then interpret each coefficient against common standards.
A structure for PSYC 421 Week 3 SPSS Assignment Part 2
Word targets are planning numbers for about 1,000 words of body text, set by the length in the guide; the rubric decides where to spend more.
| Section | What it must do | Target |
|---|---|---|
| Reliability analysis | Correct procedure and coefficient. | ~360 words |
| Validity analysis | Correlations with criteria or other measures. | ~360 words |
| Interpretation | What the results mean for test use. | ~280 words |
A topic angle that works
Chapters 5 and 6 cover reliability and validity. Expect to compute internal consistency (Cronbach's alpha) and to correlate test scores with another measure as validity evidence.
Model paragraph with notes
An original paragraph written by our desk to show the register that earns full rubric credit. It is study material: learn the moves, then write your own.
The 20-item scale showed high internal consistency (alpha = .89). Scores correlated .64 with an established measure of the same construct, supporting convergent validity, and .12 with an unrelated measure, supporting discriminant validity. Together these results suggest the test measures what it claims to with acceptable consistency.
- Reliability.
- Convergent validity.
- Discriminant validity.
Mistakes that cost points on PSYC 421 Week 3
- Reporting coefficients without interpretation.
- Confusing reliability with validity.
- Wrong procedure.
Checklist before you submit
- Length: Not set in the guide; follow the assignment instructions
- Sources: The SPSS data documents and Cohen and Swerdlik
- Calculations checked and output saved
- Every table and figure referred to in the text
- Each rubric row read against the section that answers it
Questions students ask
What does PSYC 421 SPSS Part 2 cover?
Assessing and interpreting the reliability and validity of a test in SPSS.
How many points is PSYC 421 Week 3 SPSS Assignment Part 2 worth?
100 points in Liberty's published course guide for PSYC 421, out of a course total of 1,010 points (about 10% of the grade). The rubric attached to the assignment in Canvas shows how those points are divided.
Is PSYC 421 Week 3 the same in every section of PSYC 421?
This guide follows Liberty's published course guide for PSYC 421. Liberty notes that course content can change from term to term, so if your Canvas section shows different instructions, a different week or different points, follow Canvas and your instructor.
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