Question

Problem Set 1: Pearson Correlation Coefficient Analysis

Research Scenario: A clinical psychologist would like to determine whether there is a relationship between observer ratings of children’s externalizing behaviors and scores on an established diagnostic interview assessing externalizing disorders (like ADHD, CD, etc.). He administers the diagnostic interview to 25 children and records these scores. He then trains an observer to independently rate carefully-defined externalizing behaviors for each of the 25 children. These scores are totaled for an overall “externalizing behavior index.” On both the interview and the behavioral ratings, a higher score indicates higher levels of externalizing behavior. These scores are listed in the table below.

Using this table, enter the data into a new SPSS data file and run a Pearson correlation coefficient analysis to test whether there is a relationship between the interview scores and the behavior ratings in this sample. Create a scatterplot to show the relationship between the variables.

Interview (Range 0 to 9)	Externalizing Behavior Index (Range 0 to 25)
3	7
2	9
4	6
9	22
7	20
6	12
4	10
8	9
3	5
4	7
2	5
1	3
6	16
8	19
7	21
7	22
1	4
2	7
3	7
3	3
5	13
8	19
7	16
4	12
3	9

1. Paste SPSS output.

2. Write an APA-style Results section based on your analysis. Include your scatterplot as an APA-style figure as demonstrated in the APA writing presentation. This part is so important here! PLEASE write this section in apa, scientific format! Thank you!

Answer 1

spss procedure

• enter the data
• go to analysy then to correlate and then choose bivariate
• send the variable into variables panel and click ok
• now go to graphs then click legacy dialogs and then scatter/dots;
• choose simple scatter and the click define
• send interview into x-axis panel and externalising behaviour index into y-axis and then click ok
• double click on the graph and choose fitted line and close the dailogue box opened

output1

or Direct Marketing Graphs Utilities Add-ons Window Help A 1e a Chart Builder Graphboard Template Chooser. hChart Editor X Legacy Dialogs Bar. 3-D Bar. Graph View Options File Edit Elements Help var var var var X LEL C E O L B U A & UL Line [DataSet0] A Area B I Pie High-Low 25.00 Selet thip Boxplot Error Bar.. Population Pyramid 20.00- ScatterDot. Histogram. apu

Correlations [DataSet0] Correlations Externalizingb ehaviourindex Interview Interview Pearson Correlation 1 864 Sig. (2-tailed) 000 25 25 Externalizingbehaviourind Pearson Correlation 864 1 ex Sig. (2-tailed) 000 25 N 25 Correlation is significant at the 0.01 level (2-tailed).

output2

GRAPH /SCATTERPLOT (BIVAR) Interview WITH Externalizingbehaviourindex /MISSING LISTWISE. Graph [DataSet0 R2 Linear 0.746 25.00 20.00- 15.00 10.00- 5.00- 00- 00 2.00 4.00 6.00 8.00 10.00 Interview O o o C O O O C O Externalizingbehaviourindex

results

the Spearman correlation between interview and externalising index is 0.864

this indicates that there is a fairly positive correlation between interview and externalising index variables

this can be clearly seen from the graph that there is a linear association between the two variables