Summary
Summary 2.5 Psychometric Literature
- Course
- Institution
Summary based on all the literature discussed in 2.5 course
[Show more]
Seller
Follow
foteinisav
Reviews received
Content preview
Dimensionality1. How many dimensions?
Unidimensional: when the items of a test reflect only one
attribute (psy dimension)
o E.g. geometry test score > reflects knowledge of
student only if the test items truly represent only the
knowledge of geometry.
o Conceptual homogeneity: when all the test item
responses are functions of same attribute
o Validity and reliability of unidimensional tests are
evaluated for the total score produced by the
test.
Multidimensional test: when items of the test reflect more
than one psychological attributes.
o Leads to Q2
2. If there is more than one dimension are they correlated
with each other or not? (implications for total scores)
Correlated dimensions
o E.g. Stanford-Binet test > has groups of questions
(subsets) that correspond to a different facet of
intelligence (attribute)
, o Each subset is unidimensional and the items have
conceptual homogeneity
o The subset scores are combined > total test score
General attribute= high-order factor
o Each subset is evaluated base on its psychometric
quality > each subset is examined, also the total score
produced by subsets is evaluated.
Uncorrelated dimensions: when dimensions are not or are
weakly assoc.
o Subsets > reflect attributes that are independent and
do not form a high-order factor.
o No total score is computed
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller foteinisav. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.05. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
64438 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now