Assessment L3 - BDI, BAI & DASS Flashcards
What are the 3 classification systems?
- Categorical Approach
- Dimensional Approach
- State vs Trait Approach
What is the categorical approach?
- Makes distinctions among members of different categories are QUALITATIVE
- all or none. hard cuts in between.
- Reliable, but less powerful at describing phenomena
- it gives a snapshot in time
What is the dimensional approach?
- focusses on the level of characteristics
- places a specific characteristic along an ordered sequence
- allows you to include normal people, and monitor change across time.
- DECONSTRUCTS syndromes into SYMPTOMS!!!!!!
gives the idea that conditions consist of symptoms which co-occur in many conditions - maybe the same neutral structures are involved.
What is the state vs trait approach?
- state - how i am at the moment
- trait - how i am by disposition
What is the current approach in the categorical classication system?
That diagnoses are composed on symptoms - and symptoms can occur in more than 1 diagnosis, as they may share neural mechanisms.
eg. Hallucinations - doesn’t have to be schizophrenia, can be another disorder with halluciations - either way, give D2 receptor blockers!
What does the classification system require for a diagnosis of depression?
- depressed mood or apathy/loss of interest
- 4 or more of: appetite change, worthlessness, exec dysfunc, suicidal ideation, sleep disturbances, psychomotor agitation, fatigue
What are the classes of symptom?
- Physical - appetite and sleep - respond best to antidepressants
- Cognitive & Behavioural - responds best to psychological intervention strategies
In Recovery - appetite and sleep tend to improve first, behaviour second while thoughts and feelings improve last.
What is hypomania
super high mood
What’s dysthymia
persistently low mood
may not lead to pathology but combined with an event can trigger depression
What are the relevance of informant reports?
- the convergence between self reports and informant reports of personality are an important aspect of validity.
shows if the client knows themselves, if they are good at judging other’s, and what are valid and invalid cues of personality? IS THE PERSON SUFFICIENTLY PSYCHOLOGICALLY MINDED TO BE ABLE TO ANSWER THE QUESTIONS IN A WAY THAT IS PSYCHOLOGICALLY MEANINGFUL?
What is a self-report and what does it assume?
- Assumes that people are able to report their personality accurately (self-knowledge)
- Assumes that people are willing to report their personality accurately (no effect of social desirability?)
- Can’t be used with individuals in situations that dont meet assumptions
- people are sometimes unable to report their own mental processes bc theyre not aware of how they think
What is Beck’s Depression Inventory-II?
- 21 item self report depression screening measure
- each item rated on a 4 port likert type scale ranging from 0-3
- higher scores= higher level of depression
- measure asks respondents to endorse statements characterising how they felt throughout past 2 wks
max score = 63
minimal depression - 0-13
mild - 14-19
moderate 20-28
severe 29-63
BDI psychometric properties?
- meta-analysis showed “not bad” internal consistency - mean of .86
- test retest reliability is low, may be affected by states. Depression is not stable, so it could be a situational variable - test retest subject to variability due to trait vs state.
- Evaluation of content, concurrent and discrim validity and factor analysis = favourable
- concurrent validity suggeste d to be high to mod
- Mod correls have been found with similar scales that also measure depression - convergent validity
- discriminates between psychiatric and non psychiatric populations
- measures primary factor variously referred to as a general depressive factor, or cognitive factor, however, additional factors have also been observed - somatic symps
What is the controversy associated with the use of BDI
- Debate as to whether it measures state or trait
- if it measures a state - then wide fluctuations are expected
- trait = should not be fluctuating.
should be measuring state not trait
What are some sources of error in measuring depression?
- Hard to choose one number on a 0-3 response scale –> random error
- unwillingness to tell interviewer, poor memory of feelings –> random error
- measure misses culturally bound symptoms —> systematic error. - nature of depression will be contingent on the culture from which they are from - how they respond to the questions