Psychometric Tools Flashcards
How do the symptoms included on the MADRS and HAM-D compare?
HAM-D includes more items on physical symptoms of depression not included in MADRS (
How do the symptoms included on the MADRS and HAM-D compare?
HAM-D includes more items on physical symptoms of depression not included in MADRS (
Describe the HAM-D scores indicating remission, mild, moderate & severe depression?
Remission: 0-6 no depression
Mild: 7-17 depression
Moderate: 18-24
Severe: > 24
What scores on the MADRS indicate remission/severe depression
< 10: remission
> 30: severe
Using the BDI, HAM-D, MADRS, Zung, YMRS define whether they are self-report or clinician administered?
MADRS & HAM-D: clinician observer rated
BDI: self report
Zung (depression): self report
YMRS: clinician-administered
Outline the two main broad types of rating scales?
Clinician administered
- Clinical interview
- Individual clinician judgement
- Training
- Structured
Self-rated scales
- Less time consuming
- No training required
- Patient however needs to be able to read and understand the scale
- Rely upon a standardised administration and scoring process
Define
a) Validity
b) Internal consistency
c) Inter-rater reliability
d) Test-retest reliability
a) Does the scale measure what your meant to be measuring
b) Do all items measure the same thing - correlation between items
c) Amount of variation if different raters do the same scale on the same patient (depends upon training)
d) Variation in score if the same rater repeats the same test on the same patient - how consisting are rating scores
Can the suicide behaviour questionnaire-revised diagnose depression?
No this scale is a psychological self report questionnaire which identifies risk factors for suicide in children and adolescents between 13 & 18 years
- it can however provide an estimation of severity of symptoms at a point in time
Is the hamilton rating scale for depression valid for children?
Yes - it is valid for all ages
Takes 20-25 minutes to complete
Aim is to asses severity of depression
What are the cut off scores for the Hamilton-21 (4 items do not count - HRSD-17)
0 to 6 –> no depression
7 - 17 –> mild depression
18 - 24 –> moderate depression
> 24 –> severe depression
Name some positives &. negatives of the Hamilton rating scale for depression?
- Excellent validity
- Assess a range of clinical features
BUT
- Lack of atypical symptoms (over eating/over sleeping)
- Biases towards somatic symptoms (increased weight on these items) - which may be prone to effects of medication
- Total score not weighted but individual items are
- Some of the included symptoms may only be present in remission and not in depression
- Suboptimal sensitivity at identifying remission
- Items may measure different constructs –> irritability and anxiety
Is the BDI-II self-administered
Yes
Highly reliable questionnaire developed by Beck, Steer and Brown to assess key symptoms of depression
Outline the cutoff scores for the BDI-II
0-13 - minimal depression
14-19 - mild depression
20-28 - moderate depression
29-64 - severe depression
BDI-II includes both cognitive-affective and somatic items
Assess their presence in the last 14 days
The scale takes around 10 minutes to complete
Outline the internal consistency, the test-restest reliability and variable convergent validity of the BDI-II
V high internal consistency (0.9)
Good test-retest reliability (0.65-0.72)
Variable convergent validity (0.27 - 0.89)
Convergent validity is the degree that two theoretically related measures are actually related –> how closely the scale is related to other scales of the same construct
How do the MADRS and HRSD identify the information included?
Use clinical interviews (HRSD can also use informant report)
Both are clinician rated.
MDRS is observer rated too as included an “objective item”
