Midterm Flashcards
F SCALE T<50
- Likely to be free of disabling psychopathology.
- Socially comforming
- May have “faked good.”
BACK INFREQUENCY (Fb) SCALE
- Detection of deviant or random responding in the latter part of the booklet.
- If F scale90, interpretation of original validity (L,F,K) and standard scales is possible, but interpretation of scales that involve latter items needs to be deferred.
- Random responding Fb>80
- Fake bad Fb T>80
PSYCHOPATHOLOGY INFREQUENCY SCALE (Fp)
-Assessment of extreme responding relative to psychiatric inpatients.
F scale is infrequent responding relative ro normative sample.
-Assesses the extent to which a person is claiming more symptoms than people in an inpatient psychiatric facility.
LIE SCALE (L)
-Claims of being excessively virtuous, extreme high moral character.
L>65 T
- Possible profile invalidity due to very virtuous presentation. Claiming virtues not found among people in general.
- Personality characteristics associated with highly L- naivete, rigid thinking, lack of psychological mindedness of defensiveness.
K SCALE
- Developed as a measure of test defensiveness. To improve the classification of patients who were defensive on the MMPI.
- Items ‘less obvious’ in content.
- Most items endorsed false.
- Willingness to disclose personal info and discuss problems.
K SCALE HIGH SCORES
T>65
- Reflect an uncooperative attitude and reluctance to disclose.
- Fake good response set
- Absence of psychopathology should not be assumed
- TRIN T>80, individual may be presenting a naysaying response.
K SCALE
56-65
- Approached test in a defensive manner.
- Maybe giving appearance of adequacy, control, effectiveness
- No indications of serious pathology, may reflect average, ego strengh, and resources.
K SCALE
40-55
- Healthy balance
- Well adjusted and few signs of emotional disturbance
K SCALE LOW SCORES
<40 T
- Indicative of True Response Set TRIN>80 T
- Attempt to present self in an unfavorable light
- Exaggeration of problems
- Critical and disatisfied with self
- Ineffective in dealing with problems of daily life
Minnesota Multiphasic Personality Inventory MMPI 2
- Published in 1943
- Original purpose: to determine diagnosis
- Innovation, empirical key (criterion key) approach to scale construction
- Involves selecting items for scales by identifying those that discriminate a clinical (criterion) group from a normal group
REASONS FOR THE FAILURE TO ACHIEVE ORIGINAL PURPOSE (MMPI)
- Many clinical scales are highly correlated, making it unlikely that only one scale would be elevated
- Intercorrelation due in part to item overlap btw scales
- Unreliability of specific diagnoses during development of MMPI
LINEAR T SCORES
All scales were assigned a mean of 50 and a std of 10
-Problem: non equivalency of percentile values across scales
UNIFORM T SCORES
T score of 65 falls uniformly at the 92nd percentile for the eight clinical scales and content scales
USE OF MMPI 2 NORMS WILL RESULT IN HIGHER T SCORES.
N
COMMON PLOTTING ERRORS
- Incorrect application of K correction factor
- Use of wrong profile sheet
- Plotting the scale scores on the wrong scales
WELSCH CODE
Most common coding system.
-Numbers are sequenced according to their elevation level.
VALIDITY OF MMPI2 PROFILES
- Using measures of response invalidity, we can judge whether the individual has distorted the responses to the point of invalidating the test
- In some cases, we can correct for defensivenes to arrive at a more accurate symptom picture
- Determination of scale, invalidity from a test score is arbitrary.
- Valid Invalid is a dichotomus process, but scores are continuosly distributed.
IN CLINICAL INTERPRETATION
- It’s customary to use cut off scores to suggest valid or invalid performance on a scale
- Cut off scores are arbitrary but represent the ‘best guess’ estimate based on the empirical data.
ITEM OMISSIONS, INCONSISTENT RESPONDING, AND FIXED RESPONDING
Examine indices that reflect a test taking approach sometimes taken by uncooperative clients.
CANNOT SAY SCORE (?)
- If person has omitted more than 30 items within the first 370 items, the protocol is considered valid
- Reasons for omissions: test defensiveness, indecisiveness, carelesness, poor reading skills
VARIABLE RESPONSE INCONSISTENCY (VRIN)
-Can revel inconsistent responding Reasons---- .random responding .confusion .reading problems
TRUE RESPONSE INCONSISTENCY (TRIN)
- Pairs of items that are opposite in content
- Can detect tendency to give true answers indiscriminatly acquiescence
- Tendency to give False answers ‘non acquiescence’
- Indiscriminately neysaying
ALL TRUE AND ALL FALSE PATTERNS
-Another sign of invalidity is the percentage of True and False responses in the record
-A low percentage of either true or false responses (<20%) reflects a distorted response pattern
Reasons—-
.conscious manipulation
.careless responding to the items
PROFILE IS UNINTERPRETABLE
ALL TRUE RESPONSE PATTERN
Yields extreme elevations on scales 6,7,8,9 (measure severe pathology.)
-Validity scales- very high F at a level profile is uninterpretable L and K are very low