Textbook Notes (369,133)
Canada (162,403)
York University (12,903)
Psychology (3,584)
PSYC 2030 (144)
Chapter 6

R.M. chapter 6.docx

4 Pages
91 Views

Department
Psychology
Course Code
PSYC 2030
Professor
Krista Phillips

This preview shows page 1. Sign up to view the full 4 pages of the document.
Description
R.M. Chapter 6  Validity and Reliability o Validity:  shows how well the measure does what it purports to do o Criterion validity:  How well scores on a test correlated with the particular criterion for success used to asses it o Construct validity:  Insurance tghat we are measuring the concept or contrsuct, in question o Content validity:  How adequately it has sampled the universe of content it purports to measure o Plausible rival hyp:  We are sceptical about the internal validity of the studys causal relationship  External validity is the generalizability  Reliability: o Alternate form:  Degree of relatedness of different forms from same test o Internal consistency reliability:  Overall degree of relatedness of all items in a testg or all rater in a judgement study aka reliability of components o Item to item:  Any single item on average o Test retest :  Degree of temporal stability if a measuring intrsument or test which it is designed to evaluate from one administration to another  Validity: o Contruct Validity:  Degree to which conceptualization of what is being measured ir experimentally manipulated is what is claimes  Such as the contrsucts that are measure by psych tests or that serve a link b.w i.v. and d.v. o Content validity:  Adequate sampling of the relvant material or content that a test purports to measure o Convergent and discriminant:  Convergent:Grounds established for a contruct based on the convergence of related test or behaviour  Discriminat: distinctiveness of unrelated tests or behaviour o Criterion validity:  Degree to which test is correlated with outcome criteria in the present (its concurrent validty) or the future (predictive validity) o External validity:  Generalizablity o Face validty:  Degree to which it looks as if its measuring something relevant o Internal:  Soundness of statements of causal relationship aka plausible o Statistical conclusion:  Accuracy of estimation of the magnitude of the relationship b.w the i.v. and d.v. Which tests effect size  Reliability : o Second important criterion o Implies consistency or stability o Dependability o External validty can bridge the two( r and v)ie generalizability and causal reltionships’replication o Internal consistency-how well the subject results fair together o As well as judge-judge reliability  Random and systematic errors o Random error:  Chance fluctuations / haphazard errors o Systematic error:  Slanted in a particular way ie bias  Greater the random fluctauation, the less consistent or dependable/reliable the raw scores are  Suppose the measuring instrument is off by a known percentage  May occur quite innocently  o Random errors aren’t confined to psych ie calibration of tools o Random errors are likely to cancel out e.o. while systematic errors do not  Retest and alternatre form reliability o Test retest  Estimation of fluctuation  Pearson r measure the strength of association/relatedness of 2 vars  0=no correlation. -=negative corr; + =positive  Temporal stability/dependability  As it goes higher; more dependable it is  Retest reliability depends on on
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit