MRCPsych Testing & Evaluation 3 — Questions and Answers
Question 1: A psychiatrist uses the Montreal Cognitive Assessment (MoCA) and finds a patient scores 24/30. What does this suggest?
- Normal cognition with no concern
- Possible mild cognitive impairment requiring further evaluation (Correct answer)
- Severe dementia confirmed
- The score is invalid without neuroimaging
Correct answer: Possible mild cognitive impairment requiring further evaluation
A MoCA score below 26 suggests possible mild cognitive impairment and warrants further clinical evaluation.
Question 2: Which statistical concept describes the proportion of variance in test scores attributable to true differences between individuals rather than measurement error?
- Standard error of measurement
- Reliability coefficient (Correct answer)
- Validity coefficient
- Coefficient of variation
Correct answer: Reliability coefficient
The reliability coefficient (r) represents the proportion of total score variance that is true score variance, with 1.0 indicating perfect reliability.
Question 3: The PANSS (Positive and Negative Syndrome Scale) assesses symptoms in schizophrenia across how many subscales?
- Two (positive and negative)
- Three (positive, negative, and general psychopathology) (Correct answer)
- Four (positive, negative, cognitive, and mood)
- Five domains
Correct answer: Three (positive, negative, and general psychopathology)
The PANSS comprises three subscales: positive symptoms, negative symptoms, and general psychopathology.
Question 4: A study reports Cronbach's alpha of 0.45 for a new anxiety scale. What does this indicate?
- Excellent internal consistency
- Acceptable internal consistency
- Poor internal consistency suggesting items may not measure the same construct (Correct answer)
- The scale is unidimensional
Correct answer: Poor internal consistency suggesting items may not measure the same construct
Cronbach's alpha of 0.45 is well below the commonly accepted threshold of 0.70, indicating poor internal consistency.
Question 5: Which assessment tool is the gold standard structured diagnostic interview for DSM/ICD diagnoses in research settings?
- Clinical Global Impression (CGI)
- Structured Clinical Interview for DSM-5 (SCID-5) (Correct answer)
- Brief Psychiatric Rating Scale (BPRS)
- Global Assessment of Functioning (GAF)
Correct answer: Structured Clinical Interview for DSM-5 (SCID-5)
The SCID-5 is the gold-standard semi-structured diagnostic interview widely used in psychiatric research to establish DSM-5 diagnoses.
Question 6: A clinician assessing for autism spectrum disorder in an adult should use which standardized observational instrument?
- ADOS-2 (Autism Diagnostic Observation Schedule) (Correct answer)
- MMPI-2 (Minnesota Multiphasic Personality Inventory)
- CGI-S (Clinical Global Impression-Severity)
- HAMD-17
Correct answer: ADOS-2 (Autism Diagnostic Observation Schedule)
The ADOS-2 is the gold-standard observational assessment for autism spectrum disorder across the lifespan.
Question 7: In a randomized controlled trial for a psychiatric intervention, which outcome measure type minimizes assessor bias most effectively?
- Unblinded clinician-rated scales
- Patient-reported outcomes only
- Blinded independent assessor-rated outcomes (Correct answer)
- Naturalistic observation
Correct answer: Blinded independent assessor-rated outcomes
Blinded independent assessors who are unaware of treatment allocation minimize performance and detection bias in RCTs.
MRCPsych Testing & Evaluation 3
A psychiatrist uses the Montreal Cognitive Assessment (MoCA) and finds a patient scores 24/30.
What does this suggest?