exam 3 review

# exam 3 review - Correlational research Correlational...

This preview shows pages 1–17. Sign up to view the full content.

Correlational research

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Correlational research Investigates relationship between 2+ variables Ex: is self esteem related to how shy people are?
Correlational coefficients

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Correlational coefficient (pearson) Correlational coefficient : reflect the relationship among two+ naturally occurring variables in a lineal fashion Range from -1.0 to +1.0 Signs reflect whether relationship between variables is pos. or neg. Correlation of 0.0 reflects no relationship Ex: is age related to political conservitivism?
Pearson Correlational coefficients

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Pearson Correlational coefficients Most commonly used measure of correlation (r)
How does the correlation coefficients reflects the strength of a relationship between two variables?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
How does the correlation coefficients reflects the strength of a relationship between two variables? Higher the number, more strength Correlation of .78 just as strong as variables with correlation of -.78 When r=0.0 no relationship Indicates direction of relationship between two variables Either positive or negative Positive: direct, positive relationship between two variables As on variable increases, other also increases Negative: inverse, negative relationship between two variables As one variable increases, other decreases
On a scatterplot (define), how might a positive, negative, or zero correlation be reflected by the pattern of the data?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
On a scatterplot (define) , how might a positive, negative, or zero correlation be reflected by the pattern of the data? Scatterplot: graph of participants’ scores on two variables Perfect correlation: straight line (1 to 1) Zero correlation: no linear relationship Could have curvilinear relationship Positive correlation: increase from left to right As one increases, so does other Negative correlation: decreasing from left to right As one decreases, other increases
If the correlation between two variables is .00, what might you conclude?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
If the correlation between two variables is .00, what might you conclude? There is no relationship between the two variables
A partial correlation is different than a correlation in what way?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
A partial correlation is different than a correlation in what way? Partial Correlation : correlation between two variable with the influence of one or more other variable statistically removed If the partial correlation between two variables (with the influence of the third variable removed) is significantly lower than the person correlation between the variables… Correlation is due partly to the third variable (or to variable associated to third variable)
How would you describe a directional vs. non-directional hypothesis?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
How would you describe a directional vs. non-directional hypothesis?
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern