4.2. Analytical Results
In order to investigate the mediating role of DS in a direct relationship between parental bonding and risky behaviors, data analysis was conducted in three sections: Model fit, structural model fit, and hypothesis testing.
First, the model fit was assessed using factor loading. Results showed that in the designed model (
Figure 1), the factor loading of all calculated values were lower than the expected minimum (0.4), indicating a lack of model’s reliability.
The unmodified model of mediating role of DS between parental bonding and risky behaviors. Abbreviation: IP, I position; PB, parental bonding; EC, emotional cut off; DS, differentiation of self; FO, fusion with others; OP, over protection, ER; emotional reactions; PC, parental care.
To investigate and resolve this problem, construct estimator indices were studied. After removing the unfavorable indices, the model was implemented and investigated once again, nevertheless, did not lead to any change in the results, which supported the lack of model’s reliability.
Calculation of the Cronbach’s alpha, which showed the correlation between the construct and its constituent indices, resulted in the following main constructs: All the values of DS, parental bonding and risky behaviors were in a suitable range from 0.6 to 0.7.
The composite reliability index of the constructs, which measured the explained variance of a construct and its indices relative to the variance plus measurement error, was suitable in this model. It was measured 0.74 and 0.755 for parental bonding and DS, respectively.
After investigating and removing model’s reliability, multicollinearity between the indices was the probable cause of lack of reliability. To examine the multicollinearity between the indices, variance inflation factor was used. The low values for DS (0.006) and risky-behavior (0.054) constructs indicated the lack of such problem in endogenous constructs.
The next stage was the assessment of discriminant validity through cross loading calculation. Results showed that in all constructs, low values indicated a low correlation of the constructs with indices (reliability).
To determine the fit of the structural model, and to test the research hypotheses at the same time, the following measures were used:
(1) Significant coefficients of t-value were 1.867, 0.68, and 0.765 for parental bonding and risky behavior path, parental bonding and DS path, DS and risky behaviors path, respectively, indicating that none of the research items were implemented at the confidence level of 95%.
(2) The estimated fit measures for the two endogenous constructs of the model, including DS and risky-behavior, were 0.006 and 0.055, indicating weak fit of the structural model.
(3) Effect Size Measure or 2f: The t-value only confirms or rejects the presence or absence of a relation, and does not display the intensity of such relationship. This measure is calculated for a construct that is affected by more than one endogenous variable (risky behavior).
First, the model fit measure was assessed with both endogenous variables (in the first section), and the balance fit measure of R2 = 0.05 was obtained for the two endogenous variables (namely parental bonding and differentiation of self). Then, after the removal of the model’s independent variable (parental bonding), the model was implemented again and R2 value (0.077) was computed. Afterward, the effect size (F2) was calculated using the below formula.


Results indicated a very small and negative effect size.
Finally, the amount of Q2 that calculates predictive power of the endogenous constructs showed the values of 0.0003 and 0.001 for DS and risky-behavior, respectively, indicating low predictive power of the model and its deficiency.
Hypothesis testing did not show any significant correlation between parental bonding and risky behaviors in adolescents and youths in Shiraz (t = 1.867). In addition, there was no significant correlation between parental bonding and DS (t = 0.68). This indicated that parental bonding did not affect DS in adolescents and youths with risky behaviors.
Moreover, there was no significant correlation between DS and risky behaviors (t = 0.765). Results from this research showed that DS had no effect on the exhibition of risky behaviors.