According to the results of this study, there was a statistically significant correlation between the neglect and alexithymia of parents and the maladjustment of their healthy children, either alone and combined. As indicated by the findings, an increase in parental alexithymia elevated their healthy children's maladjustments, and a rise in parental neglect reduced their healthy children's maladjustments. Nevertheless, no statistically significant effect was detected for the presence or absence of an autistic child in the family.
Studies have reported mixed results on the relationship between neglect and students' educational progress. Some studies have reported a significant positive relationship between childhood neglect and academic maladjustment, and it increases the likelihood of academic failure, grade repetition, disciplinary problems, absenteeism from school, and declined interest in lessons (
1,
16,
18), which contradicts this study. On the contrary, Egeland and Sroufe research reported a positive relationship between child abuse and academic progress (
19), which is compatible with the results of the current study. Egeland and Sroufe explained the result of his research as the inattention to the educational needs of neglected students by their parents leading to no proper understanding of their children's educational reality (
19). This may be a reason for the consistency with the results of Egeland and Sroufe (
19) and the inconsistency of our results with those of Abolghasemi et al. (
1), Nourbakhsh (
16), and Kendall-Tackett and Eckenrode (
18).
Based on a study by Ahmadikhah et al., the development of a secure attachment to parents increases one's psychological health and improves decision-making ability, social behavior, and future relationships of the child, ultimately increasing the child's adjustment, depending on various factors. A factor influencing the formation of secure attachment to parents is adequate attention received by the child from the parents; thus, neglecting a child may cause disruptions in their social relationships, which is part of their social adjustment (
6). Additionally, Berzenski et al. reported the effect of neglect on the increase of maladjustment, suggesting that a high level of parental neglect would predict greater internalization problems than externalization ones among children with alexithymic parents (
20). Lowenthal also reported lower scores in neglected students in all cognitive dimensions (
21).
Another factor affecting the formation of secure attachment is parental alexithymia (
6). Ahmadikhah et al. presented evidence of a significant negative relationship between parental alexithymia and the dimensions of the parent-child relationship. An increase in parental alexithymia leads to insecure attachment and increased anxiety in the child, which disrupts the child's future social and family relationships (
6,
22). Tarantino et al. stated that alexithymic mothers might be more indifferent to their child's needs, leading to maladjustments in children with alexithymic mothers (
3). Regarding the effects of parental alexithymia on the child's adjustment, Younesi Sinaki and Dolatshaee believes that ambivalence in parents' emotional expression (tendency to express emotion but inability to express it, expressing emotion without real tendency, or expressing and then regretting the expression) creates maladjustment patterns of problem-solving and causes behavioral problems for children (
23).
Some studies presented results regarding the significant impact of the presence of an autistic child in the family on the maladjustment of other children in the family (
9-
11), which are inconsistent with the results of the present study. On the other hand, it has been stated in some studies that the presence of an autistic child does not significantly affect the maladjustment of other children in the family (
12,
13), which is consistent with the results of the present study. To explain the possible reason for the absence of a significant effect of the presence of an autistic child in the family on the maladjustment of their healthy sibling, as we said before about how the child's attachment affects the child's maladjustment, it is worth mentioning that an essential factor in the formation of secure attachment is the characteristics of the child (
6). since a healthy child has better communication characteristics and also factors contributing to the formation of secure attachment, than his/her autistic sibling, he/she might have more attention from parents, ultimately leading to low maladjustment of him/her in the family. Thus, future studies are recommended to investigate the mediating role of attachment and assess healthy children's maladjustment levels through their teachers.
5.1. Conclusions
The results demonstrated that the neglect and alexithymia of parents have relationships jointly and specifically with the maladjustments of their healthy children. However, no difference was found between families with autistic children and families without autistic children in the relationship between neglect and alexithymia of parents and the healthy child's maladjustment. A positive relationship was observed between parental alexithymia and child maladjustment, and a negative relationship was found between parental neglect of their child and child maladjustment. In addition, a child's maladjustment is mainly influenced by parental alexithymia.
According to the findings of the present research, it can be concluded that during the life of the healthy siblings of autistic children, due to the presence of the autistic child, there is no adjustment problem. Also, one of the measures that can be taken to improve the adaptation of healthy children is to carry out necessary interventions to reduce parental alexithymia.