Psychological Assessment-Item Analysis and Test Construction
What are the effects of item analysis?
increases test score variability, helps to ensure that scores will be normality distributed, it provides maximum differentiation between examinees, it helps maximize the test reliability
Adjective Checklist
long list of adjectives to check off what ones apply to them
Multiple Choice Formats
multiple alternatives
How are statistics determined?
determined by the person who designed the test and the person who is analyzing the test
Dichotomous Format
each item has two alternatives (yes or no; true or false)
What is an example of a Continuum Format?
faces of pain in a hospital
What is scaling?
has a goal of measuring in some type of way a trait, construct, or characteristic
What is the item difficulty index (p)?
a formula that will give you a correlation coefficient
What is a rating scale?
a grouping of words, statements, or symbols on which judgements on concerning the strength of a particular trait, attitude, or emotion are indicated by the person taking the test
What is Classical Test Theory?
a test score is composed of true score and error score
What are the 5 properties of the normal curve?
occurs based upon chance; depends on a large number of observations; the tails of the bell curve recede indefinitely and never touch the baseline; the shape of the distribution is symmetrical; and the mean, median, and mode have the same value
Likert Scale Format
rate the degree to which they agree
What is test data?
raw and scaled scores
What is an item analysis?
refers to a group of statistics that can be computed for each item of a test
What is a test?
refers to systematic method for measuring a sample of behavior, knowledge, or skills and abilities
What does p represent in an item difficulty index?
represents a level of ease
Bipolar Adjectives are also known as?
simatual differential technique
What can item analysis assist us in?
understanding tests and how tests can be improved
Continuum Format is also known as?
visual analog scale