Assignement 4

SEE the ATTACHED attachments Assignment: Week 4 Requirements: Length: 3-4 pages for all activities. APA style: Include in-text citations and a reference list that includes the course text and any additional references. Instructions: • Complete all 3 activities in a single word document. • Activity 1 (attached): "Raw Score Conversion Worksheets and Expectancy Tables,” and “Total Raw Score Conversion Worksheet and Expectancy Tables (Instructions).” • Activity 2 (attached): KTEA-3--Partial Score Report." Follow directions on page 5. • Activity 3: Briefly respond to the questions below based on Chapter 5 o Explain the concept of measurement error. o Compare and contrast item reliability, stability, and interobserver agreement. o What is a standard error of measurement? o Explain three factors that can affect a test’s validity. Total Raw Score Conversion Worksheet and Expectancy Tables (Instructions for Activity 1—Week 4) 1. Review the PDF attachment “Total Raw Score Conversion Worksheet and Expectancy Tables.” (You may need to enlarge it to see the numbers clearly). These documents were taken from the Weschler Individual Achievement Test (WIAT) which is a norm-referenced assessment. 2. Recall that the raw score is usually the first score that you obtain during testing. The raw score is meaningless without a frame of reference. In this case, the frame of reference is a national sample of students (norm group) the same age who attempted the same items in the same manner on the WIAT. National averages (i.e., test scores from norm group) are reported in test manuals and provide examiners with the data they need to make comparisons across test scores. The expectancy tables within examiners’ manuals provide such data. This is where you will find the raw score conversions to derived scores (e.g., standard scores, age equivalents, grade equivalents, percentile ranks). Review “Steps in Scoring Norm-Referenced Tests” from Session 3 readings. 3. On the first page of the attachment, you will find the Total Raw Score Conversion Worksheet. The Total Raw Score Column indicates the raw scores for the subtests listed on the left (e.g., Word Reading, Numerical Operations, etc.). Convert each raw score to standard scores using the attached expectancy tables. In other words, a raw score of 90 on Word Reading converts to a standard score of 70. Look at Table F1 and find the Word Reading column. Find 90 and look to the left in the Standard Score column, you’ll see that 90 converts to a standard score of 70. Ignore the Weighted Raw Score column. Remember to enlarge the document so that you can see the numbers clearly. 4. Complete the worksheet. You may reattach the completed worksheet as a pdf or simply make a new chart in Word and attach.