Both self-control and self-authenticity are critical to individuals\' mental health and social adjustment, but their relationship has received little attention. Research demonstrates that exerting self-control could help individuals achieve true self and might be promoted by perceiving authenticity. Accordingly, this study utilized a longitudinal design and investigated the temporal relationship between self-control and self-authenticity in a large sample of 2,982 Chinese adolescents (Mage = 17.53, SD = 0.84). Correlation analysis showed that participants possessing higher self-control were associated with greater self-authenticity. Cross-lagged path analysis revealed a reciprocal relationship between self-control and self-authenticity over time. Moreover, bivariate latent change score model indicated that self-control predicted an increase in self-authenticity across time, and vice versa. Overall, this study advances our understanding and suggests that restraining temptation and impulse can promote adolescents\' authenticity, and that the experience of authenticity, in turn, facilitates their self-regulation.

Body mass index (BMI) categories and physical fitness are associated but the reciprocal relationship between BMI categories and physical fitness has not been investigated. This study aims to investigate the longitudinal reciprocal relationship between BMI categories and physical fitness.
This is a population-based 4-year cohort study in 48 elementary schools. Children aged 6 to 9 years at recruitment were included. BMI categories and physical fitness including handgrip strength, core muscle endurance, flexibility, and cardiorespiratory fitness were measured using standard equipment and protocol.
Among 26 392 eligible participants, 19 504 (73.9%) were successfully followed for 3 years. Baseline obesity prevalence was 5.9%. After 3 years, those who were unfit at baseline had an increased risk of obesity (risk ratio [RR] 1.41, 95% CI 1.16-1.71, P < .001) and those who were fit at baseline had a decreased risk of obesity (RR 0.69, 95% CI 0.60-0.80, P < .001) compared with moderately fit children. Furthermore, improvement of fitness predicted decreased risk of obesity. Similarly, normal body weight also predicted better physical fitness. The path analysis confirmed a strong reciprocal relationship between physical fitness and obesity.
Better physical fitness was prospectively associated with normal weight and vice versa. Physically fit children were more likely to maintain a healthy weight and those with a healthy weight were more likely to be physically fit, which is important for healthy development.

Mastering transcription skills is an important goal in the development of children\'s written language abilities, and handwriting fluency and spelling accuracy are crucial indicators of transcription ability. The current study was a two-year longitudinal study to investigate the reciprocal relationship of handwriting fluency and spelling accuracy. Participants included 123 students living in mainland China, who were tracked from third to fifth grade, and were administered a comprehensive battery of tests including assessments for non-verbal intelligence, phonological awareness, rapid automatized naming, and copying and dictation of Chinese characters. The results showed that: (1) previous handwriting fluency predicted subsequent spelling accuracy; and (2) previous spelling accuracy predicted subsequent handwriting fluency. These findings indicated there is a bidirectional relationship between handwriting fluency and spelling accuracy in Chinese. This implies spelling accuracy should not be unilaterally emphasized when teaching children new vocabulary, but attention should also be given to the cultivation of handwriting fluency in daily pedagogical practice.

To investigate the reciprocal relationship between unhealthy eating behaviours and depressive symptoms from childhood to adolescence.
Unhealthy eating behaviours were measured by the frequencies of eating foods with excess salt, sugar or fat in the past week. Depressive symptoms in the past two weeks were measured using a seven-item scale. Hierarchical linear growth models were used to analyse longitudinal associations between unhealthy eating behaviours and depressive symptoms. Time-fixed variables (sex, parents\' education level and household monthly income) and time-varying variables (parents\' marital status, family activities, body weight, vegetable or fruit consumption, exercising and smoking) were controlled for.
The Child and Adolescent Behaviors in Long-Term Evolution study, which commenced in 2001 and has annual follow-up.
Students (n 2630) followed from 2nd grade (8 years old in 2002) to 11th grade.
The frequency of unhealthy eating behaviours in the previous year and the difference between the frequency in the previous and successive year were positively associated with the initiation and growth rate of depressive symptoms. Depressive symptoms in the previous year and the difference in depressive symptoms between the previous and successive year were positively associated with the initial state and growth rate of unhealthy eating behaviours.
Our results suggest a reciprocal relationship between depressive symptoms and unhealthy eating behaviours. This relationship should be considered when developing programmes targeting depressive symptoms and unhealthy diet in children and adolescents.

This research aimed to explore the relation between syntactic awareness and writing composition in 129 Hong Kong Chinese children. These children were from a ten-year longitudinal project. At each year, a number of measures were administered. The 129 children\'s data of nonverbal reasoning at age 4, phonological awareness, morphological awareness, vocabulary knowledge at age 8, reading comprehension at age 12 and syntactic awareness and writing composition skills at ages 11 and 12 were included in this study. Syntactic awareness was longitudinally and uniquely predictive of Chinese children\'s writing composition, and children\'s performance in early writing composition was uniquely associated with their later syntactic skills, even when controlling for the contributions from age, nonverbal and verbal abilities, phonological awareness, and morphological awareness. The relationship between syntactic awareness and writing composition was mediated by children\'s performance in reading comprehension. These findings may suggest a reciprocal relation between syntactic awareness and writing composition, and this association may vary with ability in reading comprehension in Chinese children.

The aim of this study is to examine the developmental relationship between compounding awareness and vocabulary knowledge from grades 1 to 2 in Chinese children. In this study, 149 Chinese children were tested on compounding awareness and vocabulary knowledge from Time 1 to Time 4, with non-verbal IQ, working memory, phonological awareness, orthographical awareness, and rapid automatized naming at Time 1 as control variables. Latent growth modeling was conducted to analyze the data. Univariate models separately calculated children\'s initial levels and growth rates in compounding awareness and vocabulary knowledge. Bivariate model was used to examine the direction of the developmental relationships between the two variables with other cognitive and linguistic variables and the autoregression controlled. The results demonstrated that the initial level of compounding awareness predicted the growth rate of vocabulary knowledge, and the reverse relation was also found, after controlling for other cognitive and linguistic variables and the autoregression. The results suggested a reciprocal developmental relationship between children\'s compounding awareness and vocabulary knowledge for Chinese children, a finding that informs current models of the relationship between morphological awareness and vocabulary knowledge.

BACKGROUND: Shortcomings in elderly care have been reported in many parts of the world, including Sweden. However, national guidelines for elderly care have been introduced in Sweden, which contain core values and local guarantees of dignity. These highlight the need for dignity and well-being, and organising the older person\'s daily life so that they perceive it as meaningful. Therefore, the aim of the present study was to describe older persons\' experience and knowledge about obstacles, opportunities and solutions to developing a meaningful daily life for those living in nursing homes.
METHODS: This study combined the Participatory Appreciative Action Reflection (PAAR) and hermeneutic approaches. Twenty-five older persons participated and persons with dementia or cognitive impairments were included. Repeated interviews were carried out as reflective conversations, leaving 50 interviews in total, wherein the older persons provided their analyses and reflections on a meaningful daily life. Finally, an analysis of the data was completed based on a life-world hermeneutic approach.
RESULTS: We identified five tentative interpretations that describe obstacles, opportunities and solutions for a meaningful daily life. Themes 2 and 4 outline obstacles for a meaningful daily life, and Themes 1, 3 and 5 describe opportunities and solutions for a meaningful daily life: (1) Having space to be yourself; (2) No space to be yourself; (3) Belonging and security; (4) A feeling of insecurity; and (5) Longing for something to happen. In the main interpretation, we found that the five tentative interpretations are related to Tuan\'s concepts of space and place, where place can be described as security and stableness, and space as freedom and openness.
CONCLUSIONS: The reciprocal relationship is a solution for a meaningful daily life and occurs in the interaction between staff and older persons in nursing homes. It is the balance of power, and constitutes a place of shelter and a space of freedom for a meaningful daily life. The older person must have balance between shelter and freedom to have a meaningful daily life.

This study aimed to examine the bi-directional relationship between intimate partner violence (IPV) and depression using prospective data. Data from the Korean Welfare Panel Study (KOWEPS) were used to test whether IPV was associated with an increased overall level of depression and with the rate of change over time in depressive symptoms and whether this model of change in depressive symptoms was associated with subsequent incidences of IPV. This study utilized data from 3153 married women who participated in the KOWEPS from 2006 through 2009. The KOWEPS is a panel study of a nationally representative sample of Korean households. The women\'s responses to multiple questions adopted from the Conflict Tactics Scale (CTS) were used to create a dichotomous IPV variable at Wave1 and Wave4. The CESD-11 was used to measure the women\'s level of depression. We utilized a latent growth model (LGM) of depression using IPV at Wave1 as a predictor and IPV at Wave4 as an outcome predicted by the model parameters of the LGM of depression. We found that after controlling for the effects of age, education, social support and income, IPV at Wave1 was positively associated with overall depression levels and negatively associated with the growth rate of depression. Further, IPV at Wave4 was associated with the intercept and the slope of the depression LGM and with IPV at Wave1. The overall model fit the data well. This study indicated that experiencing IPV influences a woman\'s level of depression in terms of its overall level and rate of change, which, in turn, influences the victim\'s likelihood of experiencing subsequent IPV.