McGill PSYC 406 Psychological Tests Exam 3 - Questions with
Correct Answers (Verified Update)
50 questions
1. A school psychologist is asked whether a 9-year-old has a learning disability. Which approach
is most appropriate?
A. Give a single group IQ test
B. Use only a projective drawing
C. Combine cognitive and achievement testing, records, teacher and parent input, and classroom
observation
D. Rely on the parent's opinion alone
Correct Answer: C. Combine cognitive and achievement testing, records, teacher and parent
input, and classroom observation
Rationale: Comprehensive, multi-method assessment is required for such decisions.
2. A client asks to see the actual items she answered on an IQ test. The most appropriate
response is to:
A. Give her the test booklet to keep
B. Explain the results and what the scores mean while protecting the test items
C. Refuse to discuss results
D. Post the items online
Correct Answer: B. Explain the results and what the scores mean while protecting the test
items
Rationale: Clients have a right to understandable feedback; item security protects the test's validity.
3. A researcher records participants' country of birth. This variable is measured on which scale?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Correct Answer: A. Nominal
Rationale: Categories without inherent order.
4. Reaction times in milliseconds are measured on which scale?
A. Interval
B. Ordinal
C. Nominal
D. Ratio
Correct Answer: D. Ratio
Rationale: Zero means no time elapsed, and 400 ms is twice 200 ms.
5. Scores: 2, 4, 4, 5, 10. What is the median?
A. 5
B. 4
C. 5.25
D. 10
Correct Answer: B. 4
Rationale: The middle value of the ordered scores is 4.
, 6. Using the same scores (2, 4, 4, 5, 10), what is the mean?
A. 5
B. 4
C. 4.5
D. 6
Correct Answer: A. 5
Rationale: = 5.
7. A student scores at T = 30 on an anxiety scale. Her z-score is:
A. -3
B. -1
C. 2
D. -2
Correct Answer: D. -2
Rationale: z = (30 - 50) / 10 = -2.
8. A child's IQ is 85. What T-score is equivalent?
A. 35
B. 45
C. 40
D. 15
Correct Answer: C. 40
Rationale: z = (85 - 100) / 15 = -1; T = 50 + 10(-1) = 40.
9. On a test with M = 200 and SD = 40, a score of 260 has a z-score of:
A. 1.5
B. 0.6
C. 2.0
D. 1.0
Correct Answer: A. 1.5
Rationale: (260 - 200) / 40 = 1.5.
10. A predictor correlates .70 with job performance. What proportion of performance variance is
NOT explained by the predictor?
A. 30%
B. 49%
C. 70%
D. 51%
Correct Answer: D. 51%
Rationale: 1 - .49 = .51.
11. A test has reliability .75 and SD = 12. The SEM is:
A. 3
B. 9
C. 4
D. 6
Correct Answer: D. 6
Rationale: 12 x sqrt(.25) = 12 x .5 = 6.
Correct Answers (Verified Update)
50 questions
1. A school psychologist is asked whether a 9-year-old has a learning disability. Which approach
is most appropriate?
A. Give a single group IQ test
B. Use only a projective drawing
C. Combine cognitive and achievement testing, records, teacher and parent input, and classroom
observation
D. Rely on the parent's opinion alone
Correct Answer: C. Combine cognitive and achievement testing, records, teacher and parent
input, and classroom observation
Rationale: Comprehensive, multi-method assessment is required for such decisions.
2. A client asks to see the actual items she answered on an IQ test. The most appropriate
response is to:
A. Give her the test booklet to keep
B. Explain the results and what the scores mean while protecting the test items
C. Refuse to discuss results
D. Post the items online
Correct Answer: B. Explain the results and what the scores mean while protecting the test
items
Rationale: Clients have a right to understandable feedback; item security protects the test's validity.
3. A researcher records participants' country of birth. This variable is measured on which scale?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Correct Answer: A. Nominal
Rationale: Categories without inherent order.
4. Reaction times in milliseconds are measured on which scale?
A. Interval
B. Ordinal
C. Nominal
D. Ratio
Correct Answer: D. Ratio
Rationale: Zero means no time elapsed, and 400 ms is twice 200 ms.
5. Scores: 2, 4, 4, 5, 10. What is the median?
A. 5
B. 4
C. 5.25
D. 10
Correct Answer: B. 4
Rationale: The middle value of the ordered scores is 4.
, 6. Using the same scores (2, 4, 4, 5, 10), what is the mean?
A. 5
B. 4
C. 4.5
D. 6
Correct Answer: A. 5
Rationale: = 5.
7. A student scores at T = 30 on an anxiety scale. Her z-score is:
A. -3
B. -1
C. 2
D. -2
Correct Answer: D. -2
Rationale: z = (30 - 50) / 10 = -2.
8. A child's IQ is 85. What T-score is equivalent?
A. 35
B. 45
C. 40
D. 15
Correct Answer: C. 40
Rationale: z = (85 - 100) / 15 = -1; T = 50 + 10(-1) = 40.
9. On a test with M = 200 and SD = 40, a score of 260 has a z-score of:
A. 1.5
B. 0.6
C. 2.0
D. 1.0
Correct Answer: A. 1.5
Rationale: (260 - 200) / 40 = 1.5.
10. A predictor correlates .70 with job performance. What proportion of performance variance is
NOT explained by the predictor?
A. 30%
B. 49%
C. 70%
D. 51%
Correct Answer: D. 51%
Rationale: 1 - .49 = .51.
11. A test has reliability .75 and SD = 12. The SEM is:
A. 3
B. 9
C. 4
D. 6
Correct Answer: D. 6
Rationale: 12 x sqrt(.25) = 12 x .5 = 6.
