Background
Method
Participants
Self-assessments
The YPI
The APSD-SR
Procedure
Statistical analyses
Results
Descriptive information
Boys | Girls | Statistics | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean (SD) | Minimum-maximum | Median | Skewness (SE = 0.184) | Kurtosis (SE = 0.366) | Mean (SD) | Minimum-maximum | Median | Skewness (SE = 0.173) | Kurtosis (SE = 0.344) | Mann–Whitney U Test | Cohen’s d | |
YPI Sub-dimension
| ||||||||||||
Dishonest charm | 1.80 (0.68) | 1.00-4.00 | 1.80 | 0.839 | 0.579 | 1.73 (0.66) | 1.00-4.00 | 1.60 | 0.860 | 0.309 | 16083.50 | 0.104 |
Grandiosity | 1.89 (0.68) | 1.00-4.00 | 1.80 | 1.040 | 1.103 | 1.58 (0.61) | 1.00-3.60 | 1.40 | 1.079 | 0.529 | 12092.50* | 0.480 |
Lying | 1.80 (0.67) | 1.00-4.00 | 1.80 | 0.887 | 0.687 | 1.65 (0.61) | 1.00-4.00 | 1.50 | 0.927 | 0.381 | 14955.00** | 0.234 |
Manipulation | 1.69 (0.69) | 1.00-4.00 | 1.50 | 1.075 | 0.838 | 1.63 (0.62) | 1.00-4.00 | 1.40 | 1.058 | 0.973 | 16690.50 | 0.091 |
Remorselessness | 1.69 (0.64) | 1.00-4.00 | 1.60 | 1.256 | 1.962 | 1.44 (0.53) | 1.00-4.00 | 1.40 | 1.810 | 4.532 | 12999.50* | 0.425 |
Unemotionality | 2.13 (0.56) | 1.00-4.00 | 2.20 | 0.306 | 0.442 | 1.80 (0.53) | 1.00-4.00 | 1.80 | 1.319 | 2.733 | 10740.00* | 0.605 |
Callousness | 2.23 (0.50) | 1.00-3.40 | 2.20 | −0.292 | −0.135 | 1.67 (0.47) | 1.00-4.00 | 1.60 | 0.970 | 2.183 | 6988.00* | 1.154 |
Thrill-seeking | 2.55 (0.72) | 1.00-4.00 | 2.60 | 0.021 | −0.530 | 2.49 (0.64) | 1.00-4.00 | 2.60 | 0.006 | −0.322 | 16349.00 | 0.088 |
Impulsiveness | 2.14 (0.67) | 1.00-4.00 | 2.00 | 0.347 | −0.348 | 2.22 (0.67) | 1.00-4.00 | 2.20 | 0.242 | −0.447 | 15909.50 | −0.119 |
Irresponsibility | 1.85 (0.70) | 1.00-4.00 | 1.80 | 0.754 | −0.102 | 1.60 (0.57) | 1.00-3.80 | 1.40 | 1.114 | 1.058 | 13722.00* | 0.392 |
YPI Dimension
| ||||||||||||
Interpersonal | 7.18 (2.38) | 4.00-16.00 | 7.00 | 0.998 | 1.635 | 6.59 (2.10) | 4.00-15.40 | 6.40 | 1.024 | 1.381 | 14645.00** | 0.263 |
Affective | 6.05 (1.26) | 3.00-11.40 | 6.00 | 0.768 | 1.724 | 4.92 (1.25) | 3.00-12.00 | 4.60 | 1.667 | 5.534 | 8097.50* | 0.900 |
Behavioral | 6.54 (1.84) | 3.00-12.00 | 6.35 | 0.390 | −0.287 | 6.31 (1.60) | 3.20-11.40 | 6.20 | 0.414 | −0.960 | 16166.00 | 0.133 |
YPI Total
| 19.77 (4.94) | 11.80-38.80 | 19.60 | 0.876 | 1.546 | 17.82 (4.19) | 10.40-37.40 | 17.20 | 1.257 | 3.4160 | 13066.00* | 0.426 |
APSD-SR Dimension
| ||||||||||||
Interpersonal | 0.44 (0.40) | 0.00-2.00 | 0.29 | 1.212 | 1.650 | 0.33 (0.32) | 0.00-2.00 | 0.29 | 1.788 | 4.992 | 11552.50* | 0.304 |
Affective | 0.73 (0.34) | 0.00-1.67 | 0.67 | 0.391 | −0.041 | 0.55 (0.28) | 0.00-1.67 | 0.50 | 1.038 | 2.083 | 14392.50* | 0.578 |
Behavioral | 0.73 (0.44) | 0.00-2.00 | 0.80 | 0.423 | −0.218 | 0.68 (0.43) | 0.00-2.00 | 0.80 | 0.566 | 0.219 | 6197.50 | 0.115 |
APSD-SR Total
| 1.90 (0.82) | 0.37-4.33 | 1.77 | 0.526 | 0.022 | 1.56 (0.77) | 0.31-5.18 | 1.41 | 1.284 | 2.901 | 12658.00* | 0.427 |
Internal consistency
Boys | Girls | |
---|---|---|
YPI Dishonest charm | 0.81 | 0.82 |
YPI Grandiosity | 0.78 | 0.82 |
YPI Lying | 0.82 | 0.77 |
YPI Manipulation | 0.86 | 0.80 |
YPI Remorselessness | 0.83 | 0.79 |
YPI Unemotionality |
0.65
|
0.65
|
YPI Callousness |
0.41
|
0.43
|
YPI Thrill-seeking | 0.80 | 0.78 |
YPI Impulsiveness | 0.73 | 0.77 |
YPI Irresponsibility | 0.74 |
0.68
|
YPI Interpersonal dimension | 0.90 | 0.86 |
YPI Affective dimension |
0.55
| 0.74 |
YPI Behavioral dimension | 0.86 | 0.80 |
YPI Total score | 0.91 | 0.89 |
APSD-SR Interpersonal dimension | 0.78 | 0.74 |
APSD-SR Affective dimension |
0.38
|
0.29
|
APSD-SR Behavioral dimension |
0.68
|
0.68
|
APSD-SR Total score | 0.78 | 0.79 |
YPI | APSD-SR | |||||||
---|---|---|---|---|---|---|---|---|
Interpersonal | Affective | Behavioral | Total | Interpersonal | Affective | Behavioral | Total | |
Boys/Girls | Boys/Girls | Boys/Girls | Boys/Girls | Boys/Girls | Boys/Girls | Boys/Girls | Boys/Girls | |
YPI Dimension | ||||||||
Interpersonal | - | 0.68**/0.54**
| 0.69**/0.52**
| 0.91**/0.88**
| 0.72**/0.72**
| 0.06/0.21**
| 0.57**/0.47**
| 0.65**/0.61**
|
Affective | 0.68**/0.54**
| - | 0.62**/0.38**
| 0.83**/0.71**
| 0.56**/0.55**
| 0.28**/0.47**
| 0.53**/0.35**
| 0.64**/0.52**
|
Behavioral | 0.69**/0.52**
| 0.62**/0.38**
| - | 0.88**/0.79**
| 0.54**/0.45**
| 0.05/0.04 | 0.72**/0.77**
| 0.69**/0.69**
|
YPI total | 0.91**/0.88**
| 0.83**/0.71**
| 0.88**/0.79**
| - | 0.70**/0.72**
| 0.08/0.26**
| 0.69**/0.65**
| 0.74**/0.75**
|
APSD-SR Dimension | ||||||||
Interpersonal | 0.72**/0.72**
| 0.56**/0.55**
| 0.54**/0.45**
| 0.70*/0.72**
| - | 0.08/0.25**
| 0.57**/0.41**
| 0.74**/0.61**
|
Affective | 0.06/0.21**
| 0.28**/0.47**
| −0.05/0.04 | 0.08/0.26**
| 0.08/0.25**
| - | −0.04/0.18*
| 0.24**/0.41**
|
Behavioral | 0.57**/0.47**
| 0.53**/0.42**
| 0.72**/0.77**
| 0.69**/0.65**
| 0.57**/0.41**
| −0.04/0.18*
| - | 0.80**/0.70**
|
APSD-SR total | 0.65**/0.61**
| 0.64**/0.52**
| 0.69**/0.69**
| 0.74**/0.75**
| 0.74**/0.61**
| 0.24**/0.42**
| 0.80**/0.70**
| - |
Convergent validity
Factor analysis
YPI Sub-dimension/APSD-SR Item | Interpersonal | Affective | Behavioral | |||
---|---|---|---|---|---|---|
Boys | Girls | Boys | Girls | Boys | Girls | |
YPI | ||||||
Dishonest charm |
0.811
|
0.897
| −0.066 | −0.107 | 0.153 | 0.101 |
Grandiosity |
0.906
|
0.918
| −0.075 | 0.136 | −0.165 | −0.296 |
Lying |
0.780
|
0.657
| 0.008 | −0.079 | 0.089 | 0.240 |
Manipulation |
0.935
|
0.887
| −0.005 | −0.033 | −0.026 | 0.084 |
Remorselessness |
0.680
|
0.316
| 0.111 |
0.480
| 0.204 | 0.276 |
Unemotionality |
0.640
|
0.335
| 0.059 |
0.602
| 0.006 | −0.050 |
Callousness | −0.012 | −0.162 |
0.996
|
0.948
| −0.024 | −0.007 |
Thrill-seeking | −0.131 | 0.105 | −0.075 | −0.042 |
0.988
|
0.902
|
Impulsiveness | −0.163 | 0.069 | −0.049 | −0.138 |
0.782
|
0.872
|
Irresponsibility | 0.051 | −0.202 | 0.106 | 0.190 |
0.806
|
0.861
|
Eigenvalue
|
5.72
|
5.13
|
1.01
|
1.34
|
0.80
|
0.88
|
Variance explained
|
57 %
|
51 %
|
10 %
|
13 %
|
8 %
|
9 %
|
APSD-SR | ||||||
5 Shallow emotions | 0.225 |
0.549
| 0.176 | 0.093 |
0.461
| −0.15 |
8 Brags about accomplishments |
0.748
|
0.693
| −0.213 | −0.123 | −0.122 | −0.181 |
10 Uses or cons others |
0.536
|
0.589
| 0.070 | 0.064 | 0.106 | 0.214 |
11 Teases other people |
0.613
|
0.499
| 0.157 | 0.151 | −0.005 | 0.037 |
14 Charming in insincere ways |
0.573
|
0.656
| −0.046 | −0.225 | 0.236 | 0.148 |
15 Becomes angry when corrected |
0.420
|
0.470
| −0.023 | 0.021 |
0.380
| 0.201 |
16 Thinks he is more important |
0.887
|
0.801
| 0.012 | −0.019 | −0.263 | −0.188 |
1 Blames others for mistakes |
0.600
| 0.145 | 0.177 | 0.256 | −0.018 |
0.312
|
9 Gets bored easily | −0.044 | 0.118 | −0.226 | −0.234 |
0.550
|
0.521
|
4 Acts without thinking | 0.021 | −0.021 | 0.048 | 0.046 |
0.696
|
0.743
|
13 Engages in risky and dangerous behavior | −0.144 | 0.115 | −0.039 | −0.085 |
0.868
|
0.694
|
17 Does not plan ahead | −0.053 | 0.005 | −0.108 | −0.018 |
0.661
|
0.507
|
19 Does not show emotions |
0.514
| −0.061 | −0.186 | 0.033 | 0.013 |
0.578
|
7 Keeps promises (Reversely = R) | 0.026 | −0.003 |
0.641
|
0.661
| −0.151 | 0.053 |
12 Feels bad or guilty | 0.021 | 0.294 |
0.725
|
0.387
| 0.057 | −0.127 |
18 Concerned about the feelings of others (R) | −0.046 | 0.132 |
0.722
|
0.722
| −0.005 | −0.142 |
20 Keeps the same friends (R) | −0.027 | −0.309 |
0.674
|
0.760
| −0.151 | 0.013 |
3 Concerned about schoolwork(R) | 0.061 | 0.282 | −0.036 | 0.044 |
−0.659
|
−0.813
|
6 Lies easily and skillfully |
0.408
|
0.318
| −0.024 | 0.238 |
0.481
|
0.340
|
2 Engages in illegal activities | −0.077 | 0.189 | 0.126 | 0.81 |
0.864
|
0.595
|
Eigenvalue
|
5.71
|
5.14
|
2.17
|
1.83
|
1.68
|
1.56
|
Variance explained
|
29 %
|
26 %
|
11 %
|
9 %
|
8 %
|
8 %
|