GAT Scoring System 3 — Questions and Answers
Question 1: Which statistical measure is most commonly used to set the 'average' performance benchmark when norming a GAT score?
- Mode
- Median
- Mean (Correct answer)
- Range
Correct answer: Mean
The mean (arithmetic average) is the most commonly used measure to establish the benchmark for norm-referenced scoring.
Question 2: A test-taker receives a GAT score report showing a 'confidence interval' around their score. What is the purpose of this interval?
- To show the range of scores they could retake
- To indicate measurement error and the likely range of their true score (Correct answer)
- To display score percentiles for each section
- To compare their score to last year's average
Correct answer: To indicate measurement error and the likely range of their true score
A confidence interval reflects the standard error of measurement, showing the range within which the test taker's true score likely falls.
Question 3: If a GAT section has 40 questions and a student answers 30 correctly, what is their raw score for that section?
- 75
- 30 (Correct answer)
- 10
- 40
Correct answer: 30
The raw score equals the number of correct answers, which is 30 in this case.
Question 4: What does it mean when GAT scores are described as 'norm-referenced'?
- Scores are compared to a fixed passing standard
- Scores are interpreted relative to the performance of a reference group (Correct answer)
- Scores are normalized to remove outliers
- Scores follow a strictly normal distribution
Correct answer: Scores are interpreted relative to the performance of a reference group
Norm-referenced scoring compares an individual's performance to that of a defined group, not to a fixed standard.
Question 5: In which situation would a student's GAT scaled score increase even if their raw score stayed the same?
- If they retook the test on a harder test form (Correct answer)
- If they retook the test on an easier test form
- If they answered more bonus questions correctly
- If their percentile rank dropped
Correct answer: If they retook the test on a harder test form
If a harder test form is equated upward, the same raw score may convert to a higher scaled score to maintain fairness.
Question 6: Which GAT score type is most useful for comparing a student's performance to college admissions benchmarks?
- Raw score
- Scaled score (Correct answer)
- Number of incorrect answers
- Test completion time
Correct answer: Scaled score
Scaled scores are standardized across test forms and are the scores used for admissions decisions and benchmarks.
Question 7: What is the purpose of 'item analysis' in the development of GAT scoring rubrics?
- To determine how long each question takes to answer
- To evaluate how well individual questions distinguish between high and low performers (Correct answer)
- To count how many students chose each answer option
- To calculate the total number of items on the exam
Correct answer: To evaluate how well individual questions distinguish between high and low performers
Item analysis uses statistics like item discrimination to assess whether each question effectively differentiates students at different ability levels.
GAT Scoring System 3
Which statistical measure is most commonly used to set the 'average' performance benchmark when norming a GAT score?