Summary study book Psychometrics of R. Michael Furr, Dr. Verne R. Bacharach (H9) - ISBN: 9781452256801, Edition: 1, Year of publication: 2013 (Summary chapter 9)
Psychometrics Summary - Everything you need to know
Grade: 9.6!! 2.5 Psychometrics: DETAILED notes Lectures and Readings FSWP2-052-A
Summary of Book Chapters for Course 2.5 Psychometrics: An introduction
All for this textbook (20)
Written for
Erasmus Universiteit Rotterdam (EUR)
Psychologie
Psychometrics: An Introduction (FSWP2052A)
All documents for this subject (85)
2
reviews
By: belilommerse • 4 year ago
By: linaklee • 6 year ago
Seller
Follow
lmh
Reviews received
Content preview
Furr, & Bacharach (2014) – Psychometrics An introduction
Chapter 9 – Estimating and Evaluating Convergent and Discriminant
Validity Evidence
Psychological constructs are embedded in a theoretical context. Interconnections between
construct + other related constructs is called a nomological network. Suggests that a measure
of construct should be strongly associated with measures of some constructs but weakly
correlated with measures of other constructs.
Importance for validation: estimating degree to which test scores actually show the
predicted pattern of associations.
Methods for evaluating convergent and discriminant validity
- Focused associations: some measures have clear relevance for few specific variables
evaluating validity of interpretations for such measures. Research verifying the
predicted associations provides strong validity evidence.
o Method is to focus on few highly relevant criterion variables. Degree that test
scores are indeed correlated with those crucial variables = increased
confidence in test.
o Correlations are called validity coefficients, and are fundamental for
establishing validity. Large coefficient = increased confidence in test.
o Validity generalisation: process of evaluating a test’s validity coefficients across
large set of studies (e.g., SAT).
Usually small sample in research, due to limits on time, funding, and
other resources. BUT: small sample can have a drawback e.g., might
not be generalizable to other locations/populations.
Intended to evaluate predictive utility of test’s scores across range of
settings/times/situations etc.
Is a form of meta-analysis: combines results of several smaller
individual studies into 1 large analysis.
Can address 3 important issues:
Can reveal general level of predictive validity across all of
smaller individual studies.
Can reveal degree of variability among smaller individual
studies: lot of variability = not generalizable.
Can reveal the source of variability among studies: further
analyses might explain why results differ from each other, for
example due to differences in measurement of criterion
variable.
- Sets of correlations: correlations between test of interest + measures of criterion
variables make subjective judgement about degree to which correlations match
what would be expected (e.g., test about perfectionism, but also measures of several
psychological symptoms that are probably correlated with perfectionism, like OCD).
Then evaluate the correlation matrix. This is a common approach.
- Multitrait-multimethod matrices (MTMMM): obtain measures of several traits, each of
which is measured through several methods (e.g., self-report of social skill +
questionnaire on other traits, like impulsivity, emotional stability, etc.).
1
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 lmh. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.25. You're not tied to anything after your purchase.
