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Gurpal

Part II ISQ Club - Statistics/Tests/Classification

30 posts in this topic

Part II ISQs on two topics will be posted twice a week. You are encouraged to post a reply in the thread, stating whether you think an ISQ is true or false and why (eg. a short explanation, with reference to the textbook you used). Please only deal with one ISQ in each post and include the question as the first line of your post. All ISQs are taken from previous posts by Forum members.

In a few days this ISQ Club thread will be moved to the Question Bank board. If you submit an answer, your status will be changed to 'Question Bank member' and you will be able to see the Question Bank board. Please allow up to 48 hours for this change to happen.

This is the last 'Part II ISQ Club' post for Spring 2004. Bye!

1. Regression is usually done by the least squares method

2. Logistic regression is mostly done by the least squares method

3. R2 usually increases if a further independent variable is added

4. The fundamental attribution error is less likely to occur in non-collectivist (ie non-Northern European/US) societies

5. The trails test is a test of memory

6. Galvanic skin conductance increased in anxiety disorders

7. The first National Psychiatric Morbidity study used Disability-Adjusted Life Years (DALY)

8. Interruptive style is used in strategic family therapy

9. Manchester rating scale is a self rating scale

10. HAMD is more sensitive for change than MADRS

11. Catch-recatch methods are used to assess incidence

12. Sensitivity to sunlight is associated with acute intermittent porphyria

13. BPRS is used to screen for psychiatric disorder.

14. The World Health Organization has recently added ‘dangerousness’ to the full definition of impairment

15. Jaspers is associated with the hierarchical classification of disease

16. Neurasthenia has been retained as a diagnosis in ICD-10

17. Manic stupor is one of Kraeplin’s ‘Mixed states’

18. In epidemiology ‘caseness’ can be correctly identified with disease

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16. Neurasthenia has been retained as a diagnosis in

ICD-10

TRUE ICD-10 Class M&B Disorders pg 15

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10. HAMD is more sensitive for change than MADRS

FALSE Comp to Psych Studies pg 161-162

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2. Logistic regression is mostly done by the least squares method false page 210 companion

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. Regression is usually done by the least squares method false

least sqare assumes dependent variables are normally distributed this is not often the case of many outcomes of interest

page 210 companion

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5. The trails test is a test of memory

false page 117 seminars college psychology

tests motor speed ,visual motor coordination ,number and letter sequencing

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6. Galvanic skin conductance increased in anxiety disorders true

companion page 475

increased arousall decreased habituation

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Manchester rating scale is a self rating scale

false

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15. Jaspers is associated with the hierarchical classification of disease

false

oxford text

it is a phenomenological

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17. Manic stupor is one of Kraepelin's 'mixed affective

states'

TRUE Complete MRCPsych PART II pg 137 q 37

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12. Sensitivity to sunlight is associated ....with acute

intermittent porphyria.

FALSE Clinical Medicine(Kumar & Clark) pg1004-1005

(if ....with porphyria cutanea tarda (cutaneous

hepatic porphyria) I would answer true)

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14. The World Health Organisation has recently

added 'dangernousness' to the full definition of

impairment.

FALSE

World report on violence & health (WHO 2002)

Treating violence as a public health problem

(BMJ Editorial 5 Oct 2002 pg 726 ( & pg 731)

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8. Interruptive style is used in strategic family therapy

True: CTP Synopsis Pg 907 Table - interrupt rigid feedback cycles to change symptom maintaining sequence.

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11. Catch-recatch methods are used to assess incidence

False: For prevalence.

Cant quote reference. The method comes from bird population assessment techniques

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13. BPRS is used to screen for psychiatric disorder.

FALSE! It is used to rate severity, and response over time, NOT to screen

(Guide to assessment scales in schizophrenia - Joseph McEvoy)

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18. In epidemiology ‘caseness’ can be correctly identified with disease

FALSE: 1. Disease can be a heterogenous category. 2. Caseness can be defined in any terms, eg an asymptomatic finding.

Again, cant quote reference. Please comment/criticize/correct.

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interruptivestyle... :-[ :-[Dear A, i am not sure of the reference in synopsis,the (interrupt) ??? is mentioned in the goals of ST, in large textbook Kaplan ,  the techniques mentioned are (page2159-60) are persuasion, paradoxical injunctions, insight downplayed, pretend and ordeal techniques.

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Can anybody help me with the answer for Question 3 please?

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3. R2 usually increases if a further independent variable is added

It seems true. Various statistics-related sites report on R2 as Coefficient of Determination in regression analysis as the fraction of variation in the dependent variable that is explained by variation in the independent variable or variables.

Here is a bit about it from one of these sites dealing with R2 and 'Adjusted' R2:

(courses.bus.msu.edu/materials/1121/6_Sunday_2003.ppt)

'As additional independent variables are added to a model:

–The R2 statistic can only increase.

–The Adjusted-R2 statistic can increase or decrease.

The R2 statistic can be artificially inflated by adding any independent variable to the model.

We can compare adjusted-R2 values as a heuristic to tell whether adding an additional independent variable really helps to improve a regression model.'

Man, does statistics SUCK or what?

:o

I hope it helps, anyway

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