Confirmatory factor analysis (CFA)
based on previous Hoekstra et al. model [7] the hierarchical confirmatory factor analysis (CFA) was performed using Maximum likelihood to estimate the parameters of the model. Fit indices for model were acceptable fit including GFI [goodness-of-fit index] = 0.86, AGFI [Adjusted Goodness of Fit Index] = 0.84, CFI [comparative fit index] = 0.64, RMSEA [root means square error of approximation] = 0.06, SRMR [Standardized Root Mean Residual] = 0.05, CMIN/DF [Relative chi-square] = 3. 03, p < .001. (See Fig. 1).
Based on the results of confirmatory factor analysis, the correlation between social behavior and numbers / Patterns was − 0.78. Also, the standardized effects of social skills, routine, switching, and imagination on social behavior were 0.83, 0.01, .10, and 0.82, respectively.
Internal Consistency
To examine the internal consistency of social behavior were .78, number/pattern was .64 Cronbach's alpha for the whole questionnaire was 0.61. Moreover, the Cronbach's alpha values for subscales of social behavior including, social skill, routine, switching, imagination, were 0.63, 0.40, 0.52, and 0.59, respectively.
Mean and Std. Deviation of social behavior, social skill, routine, switching, imagination number/pattern were reported in Table 1. Mean and Standard Deviation of social behavior, social skill, routine, switching, imagination, number/pattern were reported in Table 1.
Table 1
Mean and (SD) AQP-28 items for all participant
Items
|
N
|
Minimum
|
Maximum
|
Mean
|
Social Behavior
|
574
|
31
|
87
|
63.17 (7.31)
|
Social Skill
|
574
|
9
|
28
|
19.67 (3.31)
|
Routine
|
574
|
5
|
16
|
10.22 (1.82)
|
Switching
|
574
|
4
|
15
|
10.39 (1.90)
|
Imagination
|
574
|
11
|
32
|
22.89 (3.65)
|
Numbers/Patterns
|
574
|
5
|
20
|
11.82 (2.70)
|
SD: Standard. Deviation |
Table 2 shows the Mean and Standard Deviation of social behavior, social skill, routine, switching, imagination number/pattern of AQP-28. Against all expectations, there were no significant differences according to sex. but analyzes showed that there were significant differences between men and women in numbers/patterns mean than women were significantly higher scored on numbers/patters than men.
Sex differences autistic spectrum quotient
Table 2
Mean and Standard Deviation AQP-28 items for all participant by sex
Items
|
sex
|
N
|
Mean (SD)
|
Social Behavior
|
female
|
294
|
63.14 (7.28)ns
|
Male
|
265
|
63.20 (7.40) ns
|
Social Skill
|
female
|
294
|
19.62 (3.17) ns
|
Male
|
265
|
19.66 (3.48) ns
|
Routine
|
female
|
294
|
10.20 (1.77) ns
|
Male
|
265
|
10.22 (1.90) ns
|
Switching
|
female
|
294
|
10.34 (1.93) ns
|
Male
|
265
|
10.46 (1.84) ns
|
Imagination
|
female
|
294
|
22.98 (3.67) ns
|
Male
|
265
|
22.85 (3.63) ns
|
Numbers/Patterns
|
female
|
294
|
12.06 (2.90) *
|
Male
|
265
|
11.54 (2.40) *
|
*p < .05; ns: non-significant |