100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Psychometrics Summary $16.11
Add to cart
Quickly navigate to
Preview
  2.  
  3. Universiteit Leiden (UL)
  4.  
  5. Psychometrics

Summary

Psychometrics Summary

2 reviews
 6 purchases
  • Course
  • Psychometrics
  • Institution
  • Universiteit Leiden (UL)
  • Book
  • Psychometrics

Psychometrics Summary: bullet points, simple language, nice formatting, no annoying comments! Includes all chapters required for the Leiden University course (excludes Ch 12 13) ISBN: , Psychometrics by Furr & Bacharach

Preview 4 out of 83  pages

Document information

  • No
  • All but chapters 12 13
  • May 7, 2018
  • 83
  • 2017/2018
  • Summary

Subjects

  • bacharach
  • furr
  • psychometrics
  • 978145225680

Connected book

book image

Book Title:

Author(s):

  • Edition:
  • ISBN:
  • Edition:

Written for

  • Universiteit Leiden (UL)
  • Psychologie
  • Psychometrics
All documents for this subject (4)

2  reviews

review-writer-avatar

By: markjohnobrien • 4 year ago

review-writer-avatar

By: hkvk • 5 year ago

Seller

avatar-seller
reneelipka161

Reviews received

Content preview

PSYCHOMETRICS
SUMMARY
IBP 2017-18




Renée Lipka

,Chapter 1: The Importance of Psychological Measurement

1.1 Observable Behavior and Unobservable Psychological attributes

• Behavioral scientists assess unobservable behavior by finding a observable
behavior that reflects the underlying psychological process

• We cannot “see” memory so conclusions have to make an inference = behavior
observed actually measures underlying construct

> validity = scores actually measure mental state/process, are theoretically
linked to the construct, assume that the concept itself is not just imagined

> hypothetical constructs/latent variables = theoretical psychological
characteristics that cannot be observed

• Operational definitions = procedures used to measure hypothetical constructs
(nr. of recalled items to measure STM)


1.2 Psychological Tests

Definition: “systematic procedure to compare the behavior of two or more people”

1. Involve behavioral samples
2. Samples are collected in systematic way
3. Purpose is to compare behaviors (inter- or intraindividual differences) > identify +
quantify differences

Tests can produce

- Scores reflecting amount of knowledge
- Scores producing categorical data (sorting people)

Types of tests

• Vary in content: aptitude, intelligence, personality
• Vary in response required
> open ended tests: saying anything they want
> closed ended tests: choosing among alternatives
• Vary according to methods: individual or group administration
• Vary in purpose of scores:
> criterion (domain) referenced: predetermined cutoff-score (often used for
decisions about skill level)



2

, > norm referenced: compare person to a representative reference sample
(sample must be representative of population, population must be well
defined and no doubt that person is part of it)
> criterion cutoff scores are often normed
• Speeded tests: time limited
> people not expected to finish entire test in time
> count nr. of questions answered in time
> each questioned answered should be of comfortable difficulty and
answered correctly
• Power tests: not time limited
> goal is to answer all questions
> count correct answers
> items range in difficulty to discriminate people with regard to
psychological attribute in question
• Battery = bundled tests
> not necessarily measure single psychological attribute
• Word measure can be used as verb (to measure) or noun (is a good measure)

What is psychometrics?

• Focus not on testing but attributes of tests

• Psychometrics is the science concerned with evaluating theoretical attributes of
psychological tests

> type of information (scores)

> reliability of data from psychological tests

> validity of data

Francis Galton and the scope of psychometrics

• Anthropometrics = measurement of human features
• Differential psychology as his general approach = study of individual differences
> at contrast with experimental psychology that focusses more on the
average person


1.3 Challenges to Measurement in Psychology

• Psychological phenomena are complex: we are trying to combine all the different
aspects of a concept (e.g. intelligence) in one number
• Participant reactivity: people are conscious of being measured


3

, > social desirability
> demand characteristics (figure out purpose of study)
> malingering (give poor impression on purpose)
• Expectation bias from the researchers themselves
> mostly unconscious due to vested interests
> observer/scorer bias: influence testing procedure
• Reliance on composite scores: combine all item results to one score that
supposedly represents construct
• Score sensitivity: need to find a procedure that is sensitive enough for what we
want to measure
> hard to anticipate magnitude of meaningful differences
• Apparent lack of awareness of important psychometric information
> often use to facilitate flow of information between people (from students
score to teacher)
> instructors often know little about the properties of reasons for their
examination




4

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 reneelipka161. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $16.11. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

66184 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$16.11  6x  sold
  • (2)
Add to cart
Added