Underestimating correlation from scatterplots
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Underestimating correlation from scatterplots
Authors
Published Date
1978
Publisher
Type
Article
Abstract
Eighty subjects estimated the correlation coefficient,
r, for each of 13 computer-printed
scatterplots.
Making judgments were 46 students in a
graduate-level statistics course and 34 faculty and
graduate students in a department of psychology.
The actual correlation values ranged from .010 to
.995, with 200 observations in each scatterplot and
with the order of scatterplot presentation randomized.
As predicted, subjects underestimated the
degree of actual correlation. Also as predicted, but
with substantial moderation by a method-of-presentation
factor, this underestimation was most pronounced
in the middle of the correlational
range-between the 0 and 1 extremes. Though perception
of correlation was shown not to be veridical
(i.e., in terms of r), little support was given one alternative
view-its being in terms of r².
Keywords
Description
Related to
Replaces
License
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Strahan, Robert F & Hansen, Chris J. (1978). Underestimating correlation from scatterplots. Applied Psychological Measurement, 2, 543-550. doi:10.1177/014662167800200409
Suggested citation
Strahan, Robert F.; Hansen, Chris J.. (1978). Underestimating correlation from scatterplots. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/99451.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.