Transcript Slide 1

Barbara A. Wilson, Eve Greenfield, Linda Clare, Alan Baddeley, Janet
Cockburn, Peter Watson, Robyn Tate, Sara Sopena, Rory Nannery & John
Crawford (2008)
BACKGROUND
History
• The original RBMT was published in 1985, with
an update in 2003 (RBMT-II)
• Designed to predict everyday memory problems
and to monitor change over time
• Original data was collected on adults aged 16-65
and older adult and child samples were also
collected post-publication
• Later versions included a development of RBMTC (1991) and RBMT-E (1998)
• Numerous studies since publication of the RBMT
have shown that the tool is a valid instrument for
detecting everyday memory problems in patient
groups
Why do we need a new
version?
• Some changes were needed to improve the
clinical effectiveness of the test
• In 2003 RBMT-II was published but this only
included an update of materials, e.g. included
more multiracial stimuli to reflect ethnic diversity
of UK
• RBMT-3 includes new items on tests, new
materials, a new subtest (Novel task) and
increased normative sample
• The difficulty level of the RBMT-3 is between that
of the RBMT-II and RBMT-E
Features of the new tool
• The RBMT-3 contains 14 scored subtests
• 12 of these are the same or slightly altered from
the RBMT-E.
• New ‘Novel task’ is included to assess new
learning
• 30 minutes administration
• 2 versions allowing retesting
• Can be used by a range of professionals
• Intervention chapter
• Scoring examples reported in the manual to aid
interpretation
Core capabilities of RBMT-3
• Predict everyday memory problems
• For use in neuropsychological and older
adult settings
• Helpful with assessment of patients with
more severe cognitive difficulties, e.g.
acute settings, older adults
• Meaningful to clients – reflects everyday
memory skills
• Links to rehabilitation intervention
THE TEST
The Subtests
•
•
•
•
•
•
•
•
•
•
•
•
•
•
First & Second Names – Delayed Recall
Belongings – Delayed Recall
Appointments – Delayed Recall
Picture Recognition – Delayed Recognition
Story – Immediate Recall
Story – Delayed Recall
Face Recognition – Delayed Recognition
Route – Immediate Recall
Route – Delayed Recall
Messages – Immediate Recall
Messages – Delayed Recall
Orientation & date
Novel Task – Immediate Recall NEW!
Novel Task – Delayed Recall NEW!
New Subtest – Novel Task
• Assesses ability to learn a new task
• Deficits in this skill impact on everyday life,
and also influence the individual’s capacity to
benefit from compensatory aids used in
rehabilitation.
Why a Novel Task test?
•It is important to establish the level of
ability in learning new tasks before
attempting to teach them for
rehabilitation
– NOVEL TASK
•
•
•
•
•
Based on a mathematical dissection
6 piece puzzle
Assembled in a set order
3 learning trials and a delayed trial
Scoring criteria:
– Order
– Position
STANDARDISATION
Standardisation
• 333 Normative Controls
– 172 females
161 males
– 16-89 years of age (mean age = 44.3 years)
– Chi-square goodness-of-fit tests revealed that
the sample distribution of age, education,
gender and ethnicity did not differ significantly
from the expected UK 2001 census figures
Standardisation
• Exclusionary criteria for Normative
Controls
– A history of hospitalisation or treatment for
severe psychiatric disturbance, drug or alcohol
abuse
– Spoken English inadequate for understanding
test materials or instructions
– Severe visual impairment
– Brain damage or loss of consciousness for five
minutes or more
Clinical sample
• 75 participants
Category
N
Traumatic Brain Injury
19
Stroke
24
Encephalitis
20
Progressive Conditions
12
Total
75
SCORING STUDIES
Subtest Scoring Studies
• Raw scores on the 14 RBMT-3 subtests are
converted to subtest scaled scores with a mean
of 10 and a standard deviation of 3
• Percentile ranks for scaled scores are provided
• Subtests take into account an individual’s age
and data is reported for the following age bands:
–
–
–
–
–
–
–
16-24 years of age
25-34 years of age
35-44 years of age
45-54 years of age
55-64 years of age
65-74 years of age
75-89 years of age
General Memory Index
• A General Memory Index (GMI), representing
overall memory performance can also be
calculated
• GMI is standardised to have a mean of 100 and
a standard deviation of 15
• GMI scores are calculated by summing the
scaled scores on the RBMT-3 subtests and then
converting this sum to a GMI using the
appropriate conversion table
• Conversion tables also report the confidence
intervals and percentile ranks for each GMI
Reliability
• Alternate form reliability coefficients for each subtest for
Version 1 and Version 2 of the test with the normative
and clinical sample combined ranged from 0.57 to 0.86.
• The reliability coefficient of the GMI was 0.87 for both
Versions 1 and 2
• With the exception of the Messages - Delayed Recall
subtest the inter-scorer reliability for the RBMT-3 subtests
were 0.9 or higher, indicating a high level of agreement
between scorers
– The lower level of agreement on the Messages – Delayed Recall
subtest was attributable to only two of the 18 pairs who
completed the inter-scorer study and is thought to be due to two
examinees whose results were particularly difficult to score on
this subtest.
Validity
• Factor analytic results confirmed the
construct validity of forming a GMI
• Ecological validity (as supported by
performance against the Prospective and
Retrospective Memory Questionnaire;
Smith et al., 2000) was moderate (r =-.43
Version 1; r=-.44 Version 2)
• Performance of the clinical sample
compared to the normative sample
provided strong evidence of the sensitivity
of the RBMT-3 to memory problems
Contact Us
For additional information or to place an
order:
• 800.627.7271
• Psychcorp.com