Chinese American children's temperamental shyness and responses to peer victimization as moderated by maternal praise.

This study examined the relations between Chinese American children's temperamental shyness and their assertive and submissive responses to peer victimization. The mediating role of children's anxious-withdrawn behavior in the association between their temperamental shyness and responses to peer victimization in school settings was assessed, as well as the moderating effect of observed maternal praise. Mothers of 153 Chinese American children (46.4% boys; Mage = 4.40 years, SDage = 0.79 years) reported on their children's temperamental shyness, and teachers rated children's display of anxious-withdrawn behavior and responses to peer victimization. Mothers' use of praise during their interactions with children in a free-play session was observed. Results showed that children's display of anxious-withdrawn behavior played a mediating role in the associations between their temperamental shyness and responses to peer victimization. Moreover, maternal praise moderated the relation between children's temperamental shyness and anxious-withdrawn behavior, such that more temperamentally shy children with mothers who used to praise more frequently displayed less anxious-withdrawn behavior, which, in turn, was associated with more assertiveness and less submissiveness in response to peer victimization. These findings highlight the importance of maternal praise in reducing children's display of anxious-withdrawn behavior, which in turn facilitates their capacity to cope with peer victimization. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Culturally shared and unique meanings and expressions of maternal control across four cultures.

Maternal control is a major dimension of parenting and has different meanings, practices, and potential consequences across cultures. The present study aimed to identify and compare mothers' conceptualizations of parenting control across four cultures to reveal a more nuanced understanding regarding the meaning and practices of control: European American, Chinese immigrant, Korean immigrant, and Turkish. Using a semistructured open-ended interview, 100 European American, 102 U.S. Chinese immigrant, 103 U.S. Korean immigrant, and 109 Turkish mothers of preschool-aged children reported the ratings of importance, specific reasons, and strategies for exerting control over their children in daily life. Results revealed both shared and unique conceptualizations of maternal control across four cultures. Specifically, all mothers reported that it is important to express maternal control over their children in order to set behavioral norms/standards, maintain child safety, support social relations and respect for others, provide guidance, and guide moral development. Moreover, mothers discussed utilizing nonphysical punishment, setting and maintaining rules, reasoning/negotiating, consistency, physical punishment and verbal control, showing parents' serious/stern attitude, correction, and psychological control forms of control. However, the levels at which mothers emphasize the different reasons and strategies varied across cultures, reflecting culturally emphasized values. The findings of the present study further enrich our understanding of the complexities of maternal control across cultures. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Validation of a Virtual Reality Buffet environment to assess food selection processes among emerging adults.

Emerging adulthood is a critical developmental period for examining food- and eating-related behaviors as long-term weight-related behavioral patterns are established. Virtual reality (VR) technology is a promising tool for basic and applied research on eating and food-related processes. Thus, the present study tested the validity and user perceptions of a highly immersive and realistic VR food buffet by: (1) comparing participants' food selections made in the VR buffet and a real-world (RW) food buffet cafeteria one-week apart, and (2) assessing participants' rated perceptions of their VR experience (0-100 scale). Participants comprised an ethnically diverse sample of emerging adults (N = 35, Mage = 20.49, SD = 2.17). Results revealed that participants' food selections in the VR and RW food buffets were significantly and positively correlated in Kcals, grams, carbohydrates, and protein (all p's < 0.05). Moreover, participants perceived that: (a) the VR buffet was natural (M = 70.97, SD = 20.92), (b) their lunch selection in the VR buffet represented a lunch they would select on an average day (M = 84.11, SD = 15.92); and (c) their selection represented a lunch they would select if the same foods were available (M = 91.29, SD = 11.00). Our findings demonstrated the validity and acceptability of our highly immersive and realistic VR buffet for assessing food selection that is generalizable to RW food settings one-week apart without precisely matched foods. The findings of this study support the utility of VR as a validated tool for research on psychological and behavioral food-related processes and training interventions among emerging adults.

Adaptation and assessment of the Child Feeding Questionnaire for Chinese immigrant families of young children in the United States.

BACKGROUND: Chinese immigrant mothers have been found to hold cultural-specific beliefs about children's weight and use cultural-specific feeding practices when feeding their children. However, current measurements of child feeding, including the widely used Child Feeding Questionnaire (CFQ), do not capture these cultural-specific beliefs and practices. Thus, the present study examined the underlying factor structure of the original CFQ (7-factor model) and the modified CFQ with additional Asian cultural-specific feeding items (8- and 9-factor model) and assessed the validity of the CFQ among U.S. Chinese immigrant mothers. METHOD: First-generation Chinese immigrant mothers (N = 216, Mage = 38.31, SDage = 4.34) with young children (Mage = 5.14, SDage = 1.49; 47.70% females) completed the CFQ (Birch et al., 2001), with two additional items capturing Asian cultural-specific feeding beliefs and practices. Children's and parents' body mass index and mothers' perceptions of their children's body size were also assessed. RESULTS: Our findings revealed that the 9-factor model, which included the cultural-specific feeding items, was the most optimal model to represent the factor structure of feeding beliefs and practices among U.S. Chinese immigrant mothers of young children. Mothers' feeding beliefs and practices were associated with children's and mothers' body mass index and mothers' perceptions of their children's body size. CONCLUSIONS: The present study highlighted the importance of cultural-specific beliefs and practices when examining parents' feeding perceptions, beliefs, and practices.

NMR-derived models of amidopyrine and its metabolites in complexes with rabbit cytochrome P450 2B4 reveal a structural mechanism of sequential N-dealkylation.

To understand the molecular basis of sequential N-dealkylation by cytochrome P450 2B enzymes, we studied the binding of amidopyrine (AP) as well as the metabolites of this reaction, desmethylamidopyrine (DMAP) and aminoantipyrine (AAP), using the X-ray crystal structure of rabbit P450 2B4 and two nuclear magnetic resonance (NMR) techniques: saturation transfer difference (STD) spectroscopy and longitudinal (T(1)) relaxation NMR. Results of STD NMR of AP and its metabolites bound to P450 2B4 were similar, suggesting that they occupy similar niches within the enzyme's active site. The model-dependent relaxation rates (R(M)) determined from T(1) relaxation NMR of AP and DMAP suggest that the N-linked methyl is closest to the heme. To determine the orientation(s) of AP and its metabolites within the P450 2B4 active site, we used distances calculated from the relaxation rates to constrain the metabolites to the X-ray crystal structure of P450 2B4. Simulated annealing of the complex revealed that the metabolites do indeed occupy similar hydrophobic pockets within the active site, while the N-linked methyls are free to rotate between two binding modes. From these bound structures, a model of N-demethylation in which the N-linked methyl functional groups rotate between catalytic and noncatalytic positions was developed. This study is the first to provide a structural model of a drug and its metabolites complexed to a cytochrome P450 based on NMR and to provide a structural mechanism for how a drug can undergo sequential oxidations without unbinding. The rotation of the amide functional group might represent a common structural mechanism for N-dealkylation reactions for other drugs such as the local anesthetic lidocaine.