Cooperation is central to many major transitions in evolution, including the emergence of eukaryotic cells, multicellularity and eusociality. Cooperation can be destroyed by the spread of cheater mutants that do not cooperate but gain the benefits of cooperation from others. However, cooperation can be preserved if cheaters are facultative, cheating others but cooperating among themselves. Several cheater mutants have been studied before, but no study has attempted a genome-scale investigation of the genetic opportunities for cheating. Here we describe such a screen in a social amoeba and show that cheating is multifaceted by revealing cheater mutations in well over 100 genes of diverse types. Many of these mutants cheat facultatively, producing more than their fair share of spores in chimaeras, but cooperating normally when clonal. These findings indicate that phenotypically stable cooperative systems may nevertheless harbour genetic conflicts. The opportunities for evolutionary moves and countermoves in such conflicts may select for the involvement of multiple pathways and numerous genes.

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Two focus group interviews with eight low-income Mexican fathers in two communities in a rural Midwestern state explored fathers' perceptions, behaviors, and roles related to child and family food consumption, mealtimes, and physical activity. On average, fathers were 34 years of age, had 10 years of formal education, and annual household incomes ranged from $36,250 to $46,249. Findings include the identification of fifteen themes through the process of thematic analysis that are organized by five thematic areas of interest (family food patterns, strategies for healthy eating, family roles in food shopping and preparation, family mealtimes, physical activity among families). Findings revealed ways fathers contributed to their children's and families' health and well-being, and challenges they faced. Health promotion efforts aimed at rural, low-income Mexican immigrant families can benefit from embracing fathers' perspectives and how they influence the health and well-being of their children and families.

Obesity and changing dietary patterns continue to be concerning issues among Hispanic immigrant families. Using consumer acculturation theory, the researchers conducted three focus groups with 19 mothers to examine changing behaviors (postimmigration) that affect healthy eating habits. Using a priori codes and data displays, the analysis revealed that mothers: (i) realize family food consumption needs to be healthier; (ii) recognize as barriers food availability, time constraints, and shopping practices; and (iii) link financial constraints and children's preferences to unhealthy eating. Findings suggest continued investigation of the complex factors impacting changing lifestyles, plus exploration of innovative, behavioral interventions to support immigrant families, is needed.

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Background Child screen time (ST) has soared during the COVID-19 pandemic as lockdowns and restrictions have forced changes to regular family routines. It is important to investigate how families are navigating ST. Objective This study aimed to explore families’ experiences of ST during the COVID-19 pandemic. Methods Virtual focus group sessions were conducted between December 2020 and February 2021 in English and Spanish. Transcripts were analyzed using reflexive thematic analysis. Results In total, 48 parents (predominantly Hispanic) residing in California participated in 1 of 14 focus group sessions. Children were attending school remotely at the time of the study. A total of 6 themes and 1 subtheme were identified: (1) total ST has increased; (2) children are too attached to screens; (3) ST has advantages and disadvantages but parents perceive ST as mostly negative; (4) parents and children have limited options; (5) ST restrictions (subtheme: children react negatively when ST is restricted); and (6) parents are concerned that children are not getting enough exercise. Conclusions This study provides a cross-sectional insight into how family life has changed with regard to ST during the COVID-19 pandemic. Parents expressed concerns about total ST, the addictive nature of it, and lack of physical activity. It is important that future studies examine the long-term effects of heavy ST and preemptively introduce ways to redirect children’s ST habits as the country attempts to establish a new normal.

High rates of childhood obesity and the impact this has on children's health make it important to establish a healthy lifestyle during the early school years. This pilot study explored the impact of a newly developed healthy habits curriculum. The Sprouts: Growing Healthy Habits curriculum presents topics such as energy balance, healthy sleep habits, and food groups through short activities and interactive book-reading. A nonrandomized controlled experimental study design was used to assess impact. Fifty-seven children between 5 and 6 years of age participated from two elementary schools (36 from the intervention school, 21 from the control school). Knowledge was assessed pre- and post-intervention in five content areas (farm to table, bedtime routines, portion size, energy expenditure, sugar content of beverages) using card sorting, ranking, and sequence activities. Within- and between-school comparisons were conducted using differences between groups and mixed modeling approaches. Within the intervention school, significant increases in knowledge were observed for farm to table, sugar content of beverages, and bedtime routines. For the control school, there was a significant increase in knowledge of portion sizes. Considering between-schools, only change in knowledge of bedtime routines remained significant, with greater increases in the intervention school. Results seem promising given the short dosage of curriculum. Increases in knowledge of healthy habits in early childhood may help in promoting healthy behaviors and combatting the effects of obesity.