17 Questions
What is the interpretation of a correlation coefficient of r = .5?
A large effect
When is Spearman’s rank correlation used?
For nonlinear relationships
What does the Pearson’s correlation coefficient measure?
Linear relationships
What does r² represent in correlation?
The proportion of variance accounted for by the relationship between two variables
In psychological research, what is the interpretation of a correlation coefficient of r = .3?
A moderate effect
What is the interpretation of a correlation coefficient of r = .1?
A small effect
What can greatly influence the value of the correlation coefficient?
Outliers
When is it appropriate to calculate a correlation coefficient for a given data set?
After visual inspection of the data
What is the significance of using z-scores in correlation analysis?
Z-scores allow for comparisons across variables that are on different scales
In APA style table for summarizing correlations, what should be included?
Both the r-values and the p-values
When summarizing a set of correlations in a table, what should you avoid doing?
Cut and paste output directly into a report
What does a significant weak-to-moderate positive correlation between two variables indicate?
There is a positive relationship between the variables, but it is not very strong
What is the purpose of reporting data in a table in correlation analysis?
To provide a summarized view of the correlations
What is the mean and standard deviation of z-scores?
Mean of 0 and standard deviation of 1
When using z-scores, what becomes comparable across variables?
Variables on different scales
What should be the focus of interpreting a set of correlations presented in a table?
The relevant findings
What kind of relationships can be transformed into linear ones using z-scores?
Non-linear relationships
Test your understanding of correlations and critical reading skills with this quiz on Cornell Notes. Explore the direction and strength of relationships between variables in psychological research.
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