Due Thursday
Lacourse, Claes, and Villeneuve (2001) carried out a study to see whether a love of heavy metal could predict suicide risk. Eric Lacourse and his colleagues used questionnaires to measure several variables: suicide risk (yes or no), marital status of parents (together or divorced/separated), the extent to which the person’s mother and father were neglectful, self-estrangement/powerlessness (adolescents who have negative self-perceptions, are bored with life, etc.), social isolation (feelings of a lack of support), normlessness (beliefs that socially disapproved behaviors can be used to achieve certain goals), meaninglessness (doubting that school is relevant to gain employment) and drug use. In addition, the authors measured liking of heavy metal; they included the sub-genres of classic (Black Sabbath, Iron Maiden), thrash metal (Slayer, Metallica), death/black metal (Obituary, Burzum) and gothic (Marilyn Manson). As well as liking, they measured behavioral manifestations of worshipping these bands (e.g., hanging posters, hanging out with other metal fans) and what the authors termed ‘vicarious music listening’ (whether music was used when angry or to bring out aggressive moods). They used logistic regression to predict suicide risk from these variables for males and females separately.
Upon running a logistic regression analysis, you obtain the following output:
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Omnibus Tests of Model Coefficients |
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Chi-square |
df |
Sig. |
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Step 1 |
Step |
5.833 |
3 |
.120 |
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Block |
5.833 |
3 |
.120 |
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Model |
50.417 |
12 |
.000 |
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Model Summary |
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Step |
-2 Log likelihood |
Cox & Snell R Square |
Nagelkerke R Square |
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1 |
85.116a |
.341 |
.506 |
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a. Estimation terminated at iteration number 6 because parameter estimates changed by less than .001. |
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Classification Tablea |
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Observed |
Predicted |
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Suicide Risk |
Percentage Correct |
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Non-Suicidal |
Suicidal |
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Step 1 |
Suicide Risk |
Non-Suicidal |
85 |
6 |
93.4 |
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Suicidal |
13 |
17 |
56.7 |
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Overall Percentage |
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84.3 |
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a. The cut value is .500 |
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Variables in the Equation |
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B |
S.E. |
Wald |
df |
Sig. |
Exp(B) |
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Step 1a |
Age |
.693 |
.323 |
4.589 |
1 |
.032 |
1.999 |
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Marital Status(1) |
-.183 |
.677 |
.073 |
1 |
.786 |
.832 |
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Drug Use |
.317 |
.103 |
9.446 |
1 |
.002 |
1.373 |
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Father Negligence |
.085 |
.048 |
3.127 |
1 |
.077 |
1.088 |
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Social Isolation |
-.006 |
.076 |
.006 |
1 |
.939 |
.994 |
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Meaninglessness |
-.067 |
.061 |
1.191 |
1 |
.275 |
.936 |
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Mother Negligence |
-.020 |
.053 |
.136 |
1 |
.713 |
.981 |
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Normlessness |
.191 |
.109 |
3.089 |
1 |
.079 |
1.211 |
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Self-Estrangement/Powerlessness |
.155 |
.065 |
5.727 |
1 |
.017 |
1.168 |
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Liking Metal Music |
.136 |
.092 |
2.184 |
1 |
.139 |
1.145 |
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Vicarious Listening |
-.342 |
.196 |
3.033 |
1 |
.082 |
.710 |
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Worshipping |
.159 |
.129 |
1.506 |
1 |
.220 |
1.172 |
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Constant |
-18.828 |
6.314 |
8.891 |
1 |
.003 |
.000 |
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a. Variable(s) entered on step 1: Liking Metal Music, Vicarious Listening, Worshipping. |
1) Does listening to heavy metal music (Variables: Liking Metal Music, Vicarious Listening, Worshipping) predict suicide risk in women?
2) What factors predict suicide risk in women?
Stepwise Multiple Regression
Ong et al. (2011) conducted an interesting study that examined the relationship between narcissism and behavior on Facebook in 275 adolescents. They measured the Age, Gender and Grade (at school), as well as extroversion and narcissism. They also measured how often (per week) these people updated their Facebook status (FB_Status), and also how they rated their own profile picture on each of four dimensions: coolness, glamour, fashionableness and attractiveness. These ratings were summed as an indicator of how positively they perceived the profile picture they had selected for their page (FB_Profile_TOT). They hypothesized that narcissism would predict, above and beyond the other variables, the frequency of status updates, and how positive a profile picture the person chose. To test this, they conducted two hierarchical regressions: one with FB_Status as the outcome and one with FB_Profile_TOT as the outcome. In both models they entered Age, Gender and Grade in the first block, then added extroversion (NEO_FFI) in a second block, and finally narcissism (NPQC_R) in a third block. Use the provided output to answer the questions below.
This regression will assess whether narcissism predicts, above and beyond the other variables, the rating of profile pictures.
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Block 1 |
Age, Gender, Grade |
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Block 2 |
Extraversion |
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Block 3 |
Narcissism |
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Variables Entered/Removeda |
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Model |
Variables Entered |
Variables Removed |
Method |
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1 |
Extraversion - Totalb |
. |
Enter |
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2 |
NPQC-R Totalb |
. |
Enter |
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a. Dependent Variable: Sum of Profile picture ratings |
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b. All requested variables entered. |
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Model Summaryc |
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Model |
R |
R Square |
Adjusted R Square |
Std. Error of the Estimate |
Change Statistics |
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R Square Change |
Sig. F Change |
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1 |
.355a |
.126 |
.121 |
3.438 |
.126 |
.000 |
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2 |
.504b |
.254 |
.245 |
3.187 |
.127 |
.000 |
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a. Predictors: (Constant), Extraversion - Total |
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b. Predictors: (Constant), Extraversion - Total, NPQC-R Total |
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c. Dependent Variable: Sum of Profile picture ratings |
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ANOVAa |
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Model |
Sum of Squares |
df |
Mean Square |
F |
Sig. |
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|
1 |
Regression |
283.715 |
1 |
283.715 |
24.001 |
.000b |
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Residual |
1962.262 |
166 |
11.821 |
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|
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Total |
2245.976 |
167 |
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2 |
Regression |
569.702 |
2 |
284.851 |
28.039 |
.000c |
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Residual |
1676.274 |
165 |
10.159 |
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Total |
2245.976 |
167 |
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a. Dependent Variable: Sum of Profile picture ratings |
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b. Predictors: (Constant), Extraversion - Total |
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c. Predictors: (Constant), Extraversion - Total, NPQC-R Total |
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Coefficientsa |
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Model |
Unstandardized Coefficients |
Standardized Coefficients |
t |
Sig. |
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B |
Std. Error |
Beta |
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1 |
(Constant) |
1.486 |
2.064 |
|
.720 |
.473 |
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Extraversion - Total |
.228 |
.046 |
.355 |
4.899 |
.000 |
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2 |
(Constant) |
.614 |
1.920 |
|
.320 |
.749 |
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Extraversion - Total |
.099 |
.049 |
.155 |
2.013 |
.046 |
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NPQC-R Total |
.196 |
.037 |
.409 |
5.306 |
.000 |
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a. Dependent Variable: Sum of Profile picture ratings |
1. Interpret your results. How much of the variance in frequency of status updates can be explained by extraversion and narcissism?
2. Does narcissism predict profile picture ratings above and beyond extraversion?
3. What do the results tell us about teenagers and Facebook?