Objective:To investigate the relationship between self-control and obsessive-compulsive symptoms(OCS), and the mediating role of procrastination and anxiety in this relation.Methods:Totally 6 367 Chinese college students were recruited to complete the Chinese version of the self-control scale, the Aitken procrastination inventory, and the symptom checklist-90.Descriptive analysis and Pearson correlation were carried out using SPSS 23.0.Mplus 7.4 was used to test the model fit.The mediating effects were tested using the Bootstrap method.Results:Pearson correlation analysis showed that there were significant correlations among self-control, procrastination, anxiety, and obsessive-compulsive symptoms ( r=-0.71-0.78, P<0.01). Mediation modeling analysis showed that the total indirect effect of self-control on OCS was -0.303, accounting for 63.13% of the total effect.The mediating effect of procrastination between self-control and OCS was -0.045, accounting for 9.38% of the total effect.The mediating effect of anxiety between self-control and OCS was -0.239, accounting for 49.79% of the total effect.Moreover, the chain mediating effect of procrastination and anxiety between self-control and OCS was also significant, with an effect value of -0.019, accounting for 3.96% of the total effect. Conclusion:Self-control can negatively predict OCS, procrastination and anxiety play a chain mediating role in the effect of self-control on OCS.

Objective To investigate the effects of depression and age factors on central executive's functions of updating,inhibition and,shifting.Methods Young and middle-aged depressive patients who met DSM-V diagnostic criteria and the healthy controls matched for age,gender and education were recruited in each group of 27 cases.Running Memory Task,Stop Signal Task and Task Switching were used to estimate the ability of updating,inhibition and shifting.The single sample t test,Chi-square test and covariance analysis were used to compare the differences between groups.Result (1) In accurate rate of the updating function task,the main effects of age and group were significant (F(1,104)=26.29,P＜0.01),(F(1,104)=100.72,P＜0.01),the interaction effect of the group and age was significant (F(1,104)=5.28,P＜0.05).(2) In accurate rate of the inhibition function task,the main effects of age and group were significant (F(1,04)=20.70,P＜0.01),(F(1,104)=5.57,P＜0.05),the interaction effect of the group and age wasn't significant (F(1,104)=0.59,P=0.45);In reaction time of the inhibition function task,the main effects of age and group were significant(F(1,104)=34.81,P＜0.01),(F(1,104)=28.10,P＜0.01),the interaction effect of the group and age was significant(F(1,104)=12.90,P＜0.01).(3) In Local Cost rate of shifting function task,the main effect of group wasn't significant (F(1,104)=1.45,P=0.38),the main effect of age was significant (F(1.104)=37.31,P＜0,01),and the interaction effect of the group and age wasn't significant,which were consistent with the significant Global cost rate.Conclusions (1) There is a deficiency of updating function in depressive patients;Age factors affect updating function;The decline of updating function in middle-aged depressive patients is caused by both age and depression.(2)There is a deficiency of inhibition function in depressive patients;Age factors affect inhibition function;The decline of inhibition function in middle-aged depressive patients is caused by both age and depression however age plays a leading role.(3) Depressive patients do not suffer from impairment of their shifting function as a result of the disease.

Objective To investigate the effects of depression and age factors on central executive's functions of updating,inhibition and,shifting.Methods Young and middle-aged depressive patients who met DSM-V diagnostic criteria and the healthy controls matched for age,gender and education were recruited in each group of 27 cases.Running Memory Task,Stop Signal Task and Task Switching were used to estimate the ability of updating,inhibition and shifting.The single sample t test,Chi-square test and covariance analysis were used to compare the differences between groups.Result (1) In accurate rate of the updating function task,the main effects of age and group were significant (F(1,104)=26.29,P＜0.01),(F(1,104)=100.72,P＜0.01),the interaction effect of the group and age was significant (F(1,104)=5.28,P＜0.05).(2) In accurate rate of the inhibition function task,the main effects of age and group were significant (F(1,04)=20.70,P＜0.01),(F(1,104)=5.57,P＜0.05),the interaction effect of the group and age wasn't significant (F(1,104)=0.59,P=0.45);In reaction time of the inhibition function task,the main effects of age and group were significant(F(1,104)=34.81,P＜0.01),(F(1,104)=28.10,P＜0.01),the interaction effect of the group and age was significant(F(1,104)=12.90,P＜0.01).(3) In Local Cost rate of shifting function task,the main effect of group wasn't significant (F(1,104)=1.45,P=0.38),the main effect of age was significant (F(1.104)=37.31,P＜0,01),and the interaction effect of the group and age wasn't significant,which were consistent with the significant Global cost rate.Conclusions (1) There is a deficiency of updating function in depressive patients;Age factors affect updating function;The decline of updating function in middle-aged depressive patients is caused by both age and depression.(2)There is a deficiency of inhibition function in depressive patients;Age factors affect inhibition function;The decline of inhibition function in middle-aged depressive patients is caused by both age and depression however age plays a leading role.(3) Depressive patients do not suffer from impairment of their shifting function as a result of the disease.