1. Correlation = Causation. True or False? < Know this for the rest of your psychology career. Your
teachers will ask you
all the time. Correlation does not necessarily equal causation. Correlation is simply a relationship
between scores; there is no implication that one of the variables causes the other. There are many
reasons why correlation occurs without causation. One is simply by coincidence. Another is that they
are both related to other factors that do have to do with causation however the factors in question do
not cause each other.
2. Explain how to draw a scatter diagram. Many steps go into creating a scatter diagram. First, one
must draw the x and y axes and make the decision of which variable will belong to which axis (and
then label accordingly). Next, the range of values for each variable will be determined and placed on
the axes. The lowest value will usually be zero (at the intersection of the two axes) and these values
should increase along the axes. All scores should be represented by the values. Finally, a dot will be
made for each pair of scores by finding the intersection of the horizontal line at the yaxis score and
the vertical line at the xaxis score.
3. What are the differences between linear and curvilinear correlations? The differences between
linear and curvilinear correlations are that a linear correlation can be seen visually on a scatter plot
as the dots following a (approximately) straight line. A curvilinear correlation shows dots following a
pattern that is not a straight line, like a curve.
4. Describe the differences between positive and negative linear correlations. A positive correlation is
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '09
 Dr.Hall
 Psychology, Correlation and dependence, Pearson productmoment correlation coefficient, Covariance and correlation, Spearman's rank correlation coefficient, One M

Click to edit the document details