Variables cont. Psych 231: Research Methods in Psychology. Download the class experiment results from the web page and bring to labs this week Class experiment due dates: First draft: in labs Oct 23 & 24 Final draft: in class Nov. 19th (no labs that week). Announcements. blue,. green,.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Variables cont.
Psych 231: Research Methods in Psychology
blue,
green,
brown,
Lrg,
Small,
Med,
blue,
green,
brown,
Lrg,
Small,
Med,
20º
40º
20º increase
The amount of temperature increase is the same
60º
80º
20º increase
40º
“Not Twice as hot”
20º
Categories
Categories with order
Ordered Categories of same size
Ratio scale
8 cards high
Interval scale
5 cards high
Ratio scale
Interval scale
8 cards high
5 cards high
0 cards high means ‘as tall as the table’
0 cards high means ‘no height’
Categories
Categories with order
Ordered Categories of same size
Ordered Categories of same size with zero point
“Best” Scale?
Example: Measuring intelligence?
Measuring the true score
Bull’s eye = the “true score”
Bull’s eye = the “true score”
Validity = measuring what is intended
Reliability = consistency of measurement
unreliable
invalid
reliable
invalid
reliablevalid
Reliable
Unreliable
5:00
4:56
VALIDITY
CONSTRUCT
INTERNAL
EXTERNAL
FACE
CRITERION-
ORIENTED
PREDICTIVE
CONVERGENT
CONCURRENT
DISCRIMINANT
Validity
: many varieties
VALIDITY
CONSTRUCT
INTERNAL
EXTERNAL
FACE
CRITERION-
ORIENTED
PREDICTIVE
CONVERGENT
CONCURRENT
DISCRIMINANT
Validity: many varieties
“This guy seems smart to me,
and
he got a high score on my IQ measure.”