Leadership in Mixed-Age Children's Groups

1988 ◽  
Vol 11 (4) ◽  
pp. 507-516 ◽  
Author(s):  
Anne L. Stright ◽  
Doran C. French
Keyword(s):  
Peer Interaction ◽  
Leadership Skills ◽  
Age Groups ◽  
Developmental Level ◽  
Group Choice ◽  
Older Children ◽  
Preference Group ◽  
Group Members ◽  
Mixed Age

The decision-reaching behaviour of children in mixed-age four child groups were investigated in this study of leadership. A total of 120 children were assigned to mixed-age groups that were composed of either two 7 and two 9-year-olds, or two 9 and two 11-year-old children. Children were observed as they attempted to reach consensus regarding the ordering of a set of pictures. They were videotaped, and their utterances were subsequently coded. Familiarity and developmental level were controlled by comparing 9-year-old children who were interacting with either 7 or 11-year-old children. Nine-year-old children in groups with younger peers exhibited more organisation statements, solicitations of preference, group choice suggestions, and recording, and less following than did 9-year-olds grouped with older peers. These results are consistent with previous findings and demonstrate that findings of leadership asymmetries in mixed-age groups are not artifacts of familiarity confounds. Using within group analyses it also found that older children in the mixed-age groups engaged in more organisation behaviour, solicitations of preference, and recording than did younger group members. These results are consistent with the argument that mixed-age peer interaction may be a particularly important context for the learning and practice of leadership skills.

TO SYNCHRONISE OR NOT TO SYNCHRONISE: A DILEMMA FOR YOUNG BIGHORN MALES?

Behaviour ◽  
1999 ◽  
Vol 136 (6) ◽  
pp. 805-818 ◽  
Author(s):  
Keyword(s):  
Body Size ◽  
Age Groups ◽  
Young Male ◽  
Ovis Canadensis ◽  
Sexually Dimorphic ◽  
Group Type ◽  
Group Members ◽  
Mixed Groups ◽  
Mixed Age ◽  
Dimorphic Species

AbstractBighorn sheep (Ovis canadensis) are sexually dimorphic and live in nursery groups, bachelor or mixed groups. To remain in a group, individuals have to synchronise their activity according to the type of group they are in, which may incur a cost for individuals of different body size from the other group members. To test this hypothesis, I calculated the degree of synchrony of activities for each individual within a group. Animals in nursery or bachelor groups were highly synchronised with each other while mixed-age-sex groups had the lowest group synchronisation index. Two and three-year old bighorn males are intermediate in body size between the two adult sexes. Two-year-old males always adjusted their behaviour independent of group type, while three-year-old males synchronised their behaviour when with bachelor, but less so when in nursery groups. I suggest that two- and three-year-old males may face a conflict between synchronising their behaviour to stay in a group and the need to forage according to their own time budgets. I conclude that intermediate-sized young male ungulates of sexually dimorphic species may be better off forming same-sex-age groups.

Toddler peer interaction in mixed-age groups

1988 ◽  
Vol 9 (2) ◽  
pp. 211-218 ◽  
Author(s):  
Carrie Rothstein-Fisch ◽  
Carollee Howes
Keyword(s):  
Peer Interaction ◽  
Age Groups ◽  
Mixed Age

RTS,S/AS01, a vaccine targeting pre-erythrocytic stages of Plasmodium falciparum

2017 ◽  
Vol 1 (6) ◽  
pp. 533-537
Author(s):  
Lorenz von Seidlein ◽  
Borimas Hanboonkunupakarn ◽  
Podjanee Jittmala ◽  
Sasithon Pukrittayakamee
Keyword(s):  
Protective Efficacy ◽  
Age Groups ◽  
Sub Saharan Africa ◽  
Phase Iii ◽  
European Medicines Agency ◽  
Older Children ◽  
Pivotal Phase ◽  
Malaria Epidemiology ◽  
Maximum Benefit ◽  
Sub Saharan

RTS,S/AS01 is the most advanced vaccine to prevent malaria. It is safe and moderately effective. A large pivotal phase III trial in over 15 000 young children in sub-Saharan Africa completed in 2014 showed that the vaccine could protect around one-third of children (aged 5–17 months) and one-fourth of infants (aged 6–12 weeks) from uncomplicated falciparum malaria. The European Medicines Agency approved licensing and programmatic roll-out of the RTSS vaccine in malaria endemic countries in sub-Saharan Africa. WHO is planning further studies in a large Malaria Vaccine Implementation Programme, in more than 400 000 young African children. With the changing malaria epidemiology in Africa resulting in older children at risk, alternative modes of employment are under evaluation, for example the use of RTS,S/AS01 in older children as part of seasonal malaria prophylaxis. Another strategy is combining mass drug administrations with mass vaccine campaigns for all age groups in regional malaria elimination campaigns. A phase II trial is ongoing to evaluate the safety and immunogenicity of the RTSS in combination with antimalarial drugs in Thailand. Such novel approaches aim to extract the maximum benefit from the well-documented, short-lasting protective efficacy of RTS,S/AS01.

scholarly journals Incidence of childhood injuries and modifiable household risk factors in rural Ghana: a multistage, cluster-randomised, population-based, household survey

BMJ Open ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. e039243
Author(s):  
Adam Gyedu ◽  
Barclay T Stewart ◽  
Easmon Otupiri ◽  
Kajal Mehta ◽  
Peter Donkor ◽  
...  
Keyword(s):  
Risk Factors ◽  
Protective Factor ◽  
Age Groups ◽  
Secondary Outcome ◽  
Older Children ◽  
Multilevel Regression ◽  
Sampling Weights ◽  
Effective Prevention ◽  
Childhood Injuries ◽  
Rural Ghana

ObjectiveWe aimed to describe the incidence of childhood household injuries and prevalence of modifiable household risk factors in rural Ghana to inform prevention initiatives.Setting357 randomly selected households in rural Ghana.ParticipantsCaregivers of children aged <5 years.Primary and secondary outcome measuresChildhood injuries that occurred within 6 months and 200 metres of the home that resulted in missed school/work, hospitalisation and/or death. Sampling weights were applied, injuries were described and multilevel regression was used to identify risk factors.ResultsCaregivers from 357 households had a mean age of 35 years (SD 12.8) and often supervised ≥2 children (51%). Households typically used biomass fuels (84%) on a cookstove outside the home (79%). Cookstoves were commonly <1 metre of the ground (95%). Weighted incidence of childhood injury was 542 per 1000 child-years. Falls (37%), lacerations (24%), burns (12%) and violence (12%) were common mechanisms. There were differences in mechanism across age groups (p<0.01), but no gender differences (p=0.25). Presence of older children in the home (OR 0.15, 95% CI 0.09 to 0.24; adjusted OR (aOR) 0.26, 95% CI 0.13 to 0.54) and cooking outside the home (OR 0.28, 95% CI 0.19 to 0.42; aOR 0.25, 95% CI 0.13 to 0.49) were protective against injury, but other common modifiable risk factors (eg, stove height, fuel type, secured cabinets) were not.ConclusionsChildhood injuries occurred frequently in rural Ghana. Several common modifiable household risk factors were not associated with an increase in household injuries. Presence of older children was a protective factor, suggesting that efforts to improve supervision of younger children might be effective prevention strategies.

Age, Cooperative vs Lecture Training, and Group Composition: Some Preliminary Findings of Effects on Performance

1995 ◽  
Vol 77 (1) ◽  
pp. 267-274 ◽  
Author(s):  
Yvonne Sell ◽  
Theresa J. B. Kline
Keyword(s):  
Problem Solving ◽  
Group Composition ◽  
Age Groups ◽  
Traditional Lecture ◽  
Undergraduate Women ◽  
Older Subjects ◽  
Mixed Age ◽  
Problem Solving Task

18 younger (under 25 years) and 18 older (over 39 years) undergraduate women were trained in problem-solving by either a cooperative or traditional lecture technique and in age-consistent, i.e., younger or older participants only, or mixed age, i.e., younger and older participants, groups. Analysis indicated that older subjects did not score as well on the problem-solving task (48.9 vs 43.9) where lower scores indicate better performance, particularly in mixed-age groups (58.2 vs 44.3); older subjects completed the task more quickly (349 sec. vs 466 sec), age-consistent groups completed the task equally quickly regardless of training; and age-inconsistent groups completed the task more quickly when cooperatively trained (183 sec. vs 390 sec).

scholarly journals Infant Acute Myeloid Leukemia: A Unique Clinical and Biological Entity

Cancers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 777
Author(s):  
Charlotte Calvo ◽  
Odile Fenneteau ◽  
Guy Leverger ◽  
Arnaud Petit ◽  
André Baruchel ◽  
...  
Keyword(s):  
Acute Myeloid Leukemia ◽  
Myeloid Leukemia ◽  
Lymphoblastic Leukemia ◽  
Age Groups ◽  
Study Groups ◽  
Biological Entity ◽  
Age Group ◽  
Older Children ◽  
Megakaryoblastic Leukemia ◽  
Acute Myeloid

Infant acute myeloid leukemia (AML) is a rare subgroup of AML of children <2 years of age. It is as frequent as infant acute lymphoblastic leukemia (ALL) but not clearly distinguished by study groups. However, infant AML demonstrates peculiar clinical and biological characteristics, and its prognosis differs from AML in older children. Acute megakaryoblastic leukemia (AMKL) is very frequent in this age group and has raised growing interest. Thus, AMKL is a dominant topic in this review. Recent genomic sequencing has contributed to our understanding of infant AML. These data demonstrated striking features of infant AML: fusion genes are able to induce AML transformation without additional cooperation, and unlike AML in older age groups there is a paucity of associated mutations. Mice modeling of these fusions showed the essential role of ontogeny in the infant leukemia phenotype compared to older children and adults. Understanding leukemogenesis may help in developing new targeted treatments to improve outcomes that are often very poor in this age group. A specific diagnostic and therapeutic approach for this age group should be investigated.

scholarly journals Trends in the burden of varicella in UK general practice

2017 ◽  
Vol 145 (13) ◽  
pp. 2678-2682 ◽  
Author(s):  
J. L. WALKER ◽  
N. J. ANDREWS ◽  
R. MATHUR ◽  
L. SMEETH ◽  
S. L. THOMAS
Keyword(s):  
General Practice ◽  
Age Groups ◽  
Healthcare Utilisation ◽  
Current Data ◽  
Varicella Vaccination ◽  
Practice Research ◽  
Clinical Practice Research Datalink ◽  
Older Children ◽  
Asian Ethnicity ◽  
Black African

SUMMARYChildhood varicella vaccination has not yet been introduced in the UK. To inform decision-making about future vaccine programmes, data on the burden of varicella in general practice over a 10-year period (01/01/2005–31/12/2014) was calculated by age and ethnicity, using anonymised data from >8 million individuals in the Clinical Practice Research Datalink. Varicella consultations peaked at 20 603 in 2007, then decreased annually in all age groups to 11 243 in 2014. Each year, consultation rates were common among infants, were highest among 1–3 year olds (61·2 consultations/1000 person-years in 2007, 39·7/1000 person-years in 2014) and then fell with increasing age to <1·0/1000 person-years at ages ⩾20 years. Varicella acquisition appeared to be delayed in some ethnic groups, with lower consultation rates for children aged <3 years but increased rates for older children and adults aged ⩽40 years among those of black African, Afro-Caribbean, South Asian or other Asian ethnicity. Decreasing general practice consultation rates over time could reflect changes in healthcare utilisation, with patients seeking care in alternative settings such as Accident and Emergency Departments, although current data prevent full assessment of this. Availability of data on varicella diagnoses across all health settings would enable estimation of the total healthcare burden due to varicella and the cost-effectiveness of introducing varicella vaccination.

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