Classification of OCD research

The researcher's and research for the classification and diagnosis of OCD. AQA PSYA4 OCD.

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Goodman et al.

1. Reliability

Measuring Obsessions and Compulsions

Yale - Brown Obsessive Compulsive Scale (Y-BOCS)

semi-structured interview

used to assess symptom severity

and monitor response to treatment

1 of 8

Woody et al.

2. Reliability

Research Evidence

assessed 54 OCD patients using Y-BOCS

FOUND: good internal consistency

inter-rater reliability = excellent

test-retest results = lower than desirable


good test-retest reliability over short-term

2 of 8

Baer et al.

3. Reliability

Research Evidence

self-report and computerised versions of Y-BOCS developed

yield similar reliabilty scores to interviewer-administered versions

3 of 8

Scahill et al.

4. Reliability

Research Evidence

CY-BOCS - childrens version

has good inter-rater reliability

4 of 8

Rosenfield et al.

5. Validity

Discriminant Validity

FOUND: patients diagnosed with OCD = higher Y-BOCS

-> does distinguish OCD from other conditions

5 of 8

Woody et al.

6. Validity

Discriminant Validity

poor discrimination with depression

patients diagnosed with OCD -> diagnosed with depression

6 of 8

Williams et al.

7. Cultural Bias

significant difference between normal populations of black and white Americans in the score for contamination obsessions

7 of 8

Matsunaga et al.

8. Cultural Bias

studied Japanese OCD patients

FOUND: symptoms similar to those in the West

-> OCD transcends cultures

8 of 8


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