Cognitive Assessment Midterm Flashcards
WAIS-IV
- Scale measuring adult intelligence
- For ages 16-69
- Contains 10 main sub-tests and 5 supplementary tests
What are the 4 index scales being measured in the WAIS-IV?
- Verbal Comprehension Index
- Perceptual Reasoning Index
- Working Memory Index
- Processing Speed Index
What tests are included in the Verbal Comprehension Index (VCI) ?
- Similarities
- Vocabulary
- Information
- Comprehension (supplementary test)
Which tests are included in the Perceptual Reasoning Index? (PRI)
- Block Design
- Matrix Reasoning
- Visual Puzzles
- Figure Weights (supplementary test)
- Picture Completion (supplementary test)
Which tests are included in the Working Memory Index? (WMI)
- Digit Span
- Arithmetic
- Letter-Number Sequencing (supplementary test)
Which tests are included in the Processing Speed Index? (PSI)
- Symbol Search
- Coding
- Cancellation (supplementary test)
Similarities
- part of the VCI
- Verbal tests testing verbal-abstract/categorical reasoning
Tests Abstraction, involving
o previous learning (long-term memory, crystallized intelligence)
o verbal comprehension
o associative thinking
o ability to perceive and verbalize similarities that are more abstract than surface dissimilarities
o May reflect cultural/educational bias
Vocabuary
- Part of the VCI
- Verbal test; testing verbal skills through word definitions. (educational purpose)
Tests the following:
o Crystallized Intelligence
o Number of words known, not elegance of language
o The best single measure of intelligence
o Reflects learning ability (via past learning), fund of general information, general range of ideas
Information
- Part of the VCI
- Crystallized Intelligence
- Testing semantic memory/factual knowledge
- testing general information (education/societal exposure)
Questions regarding o general information o contemporary affairs o cultural information o scientific information and numerical information
Comprension
- Supplementary test of the VCI
- Verbal test; testing moral reasoning and different concepts
- socially constructed ideas
o Practical judgment (Using own information to make decision)
o Discerning and articulating rationales for various cultural practices, conventions, or principles—also require information
o Proverbs
Block Design
- Part of the PRI
- Testing visual-spatial construction and motor skills
- non-verbal test
o Visual Processing
o To succeed must Perceive accurately, Analyze, Synthesize, Reproduce
Matrix Reasoning
- Part of the PRI
- non-verbal abstract reasoning
- Pattern completion test
o Assesses fluid reasoning
o “ability to perform mental operations, such as manipulation of abstract symbols”
o Shows greatest Flynn effect
o Visual-spatial
Figure Weights
- Supplementary test in PRI
- Abstract non-verbal reasoning
- Visual-conceptual task
o fluid reasoning
o Visual perception, quantitative reasoning: inductive and deductive.
Picture-completion
- Supplementary test in PRI
- Visual-perceptual task
- Attention task
o Nonverbal “fund of information”, ability to distinguish essential from nonessential detail
o Requires attention to detail and concentration
Digit-Span
- Part of WMI
- testing working memory
- auditory working memory
- Attention span
- short-term memory
o Memory task, good test of general intelligence at lower levels
o Requires good “mental control”
o Short term memory
Arithmetic
- Part of WMI
- testing working memory
- math memory
- language understanding
o Simplest operations required
o Effective performance depends on ability to concentrate on the problem, memory, logical problem-solving, not advanced mathematical training
o High demand for concentration and memory, times,
Letter-number sequencing
- Supplementary test in WMI
- working memory
- Taps into executive functioning
- A little more complex
- Short term memory
Symbol Search
- Part of PSI
- testing processing speed
- Visual Scanning & matching within a particular time limit
o Uses abstract symbols that are not numbers
o Less demand for motor coordination
o Visual analysis
Coding
- part of PSI
- testing visual processing speed
- matching number and symbols
- test is also timed
o Processing Speed
o Sustained concentration, working under time pressure, forming set quickly
o Impaired by:
o Poor concentration, psychomotor retardation, difficulty in quickly acquiring a set
Cancellation
- Supplementary test if PSI
- Processing speed
visually based processing - cancelling out shapes and colors in a particular order.
- timed test
o Visual recognition and speed of visual processing
o Simpler motor response than coding
What is intelligence?
- According to Weschler “ global or aggregate ability to act purposefully, to think rationally, and to deal effectively with the environment”
What is the Full Scale IQ? (FSIQ)
- forms the basis for the interpretation of all other tests on WAIS
- estimates client’s standing compared to the general population.
- does not really tell us anything about any issues with the underlying dimensions
o Composite index of general intelligence or cognitive ability
o Most reliable and valid of indices
o Estimates examinee’s standing in the general population
o Does not tell us underlying dimension on which individuals vary
o Dimension of human variability reflects genetic and social and biological environmental influences
What is General Intelligence
- average level of all he independent components that contribute to such tasks
o Individual difference variable in their ability to understand complex ideas to adapt effectively to their environment to learn from experience to engage in various forms of reasoning to overcome obstacles by taking thought
What is “g”?
- single ability common to all tasks
- test scores on very different cognitive tasks show a “positive manifold”
General factor of intelligence