Chapter 11 - The Years of Childhood Flashcards
(94 cards)
define motor development
motor development refers to the progression of muscular coordination.
basic motor skills:
-grasping and reaching for objects
-manipulating objects
-sitting up
-crawling
-walking
-running
infants & walking
-walking is typically mastered at around 12 months of age
-during free play, infants average 2,368 steps and 17 falls per hour
-data suggests that infants may walk more than 14,000 steps per day - about the length of 46 football fields!
-walking improves very rapidly due to high activity levels
physical growth during early motor development
-growing during infancy is rapid but uneven
-long periods of no growth are followed by sudden growth spurts
-growth spurts are often accompanied by restlessness, irritability, and increased sleep
what does newer research suggest about the role of infants in motor development?
-infants are active agents inter motor development.
-motor development is driven by their exploration and need to master tasks (e.g., grasping, viewing surrounding).
-it’s not solely a passive process tied to maturation.
define maturation
maturation is the development that reflects the gradual unfolding of one’s genetic blueprint.
define developmental norms
developmental norms indicate the median age at which individuals display various behaviours and abilities.
why should parents not worry if their child doesn’t meet developmental norms exactly?
-norms are group averages, not strict rules.
-variation is normal - many healthy children reach milestones earlier or later than the median.
cultural variations in motor development
-cultural practices can accelerate or delay motor milestones.
-Kipsigis infants (Kenya) begin to walk about 1 month earlier than North American infants due to early training.
-Aché children (Paraguay) experience ~1 year delay for walking, due to safety concerns resulting in mothers carrying their babies virtually everywhere.
what do cross-cultural studies suggest about the role of maturation in motor development?
-environmental factors cam accelerate or slow down early motor development.
-however, the similarities across cultures in the sequence and timing of early motor development outweigh the differences - which suggests that early motor development depends to a considerable amount on maturation.
**later motor development is a different matter as children in different cultures acquire more specialized motor skills, some of which being unique to their culture.
define temperament
refers to characteristic mood, activity level, and emotional reactivity.
**an infant’s temperament is evident very early in life.
What did Thomas and Chess study?
they conducted a major longitudinal study on the development of temperament in children.
what is a longitudinal design in developmental research?
it involves observing the same group of participants repeatedly over a period of time.
what is a cross-sectional design in developmental research?
it involves comparing different age groups at a single point in time.
pros and cons of the cross-sectional design
advantage:
quicker and cheaper to conduct
disadvantage:
results may be affected by cohort effects
**cohort effects: differences between age groups caused by growing up in different historical contexts, not by development.
pros and cons of longitudinal designs
advantage:
more sensitive to actual developmental changes
disadvantage:
participant dropout may skew results over time
when is temperamental individuality well-established, according to Thomas and Chess?
by the time an infant is 2 to 3 months old
what are the three basic styles of temperament identified by Thomas and Chess?
easy, slow-to-warm-up, and difficult
describe easy children (~40%)
happy, regular in sleeping/eating, adaptable, and not easily upset
describe slow-to-warm-up children (~15%)
less cheerful, irregular in routines, slow to adapt, moderately reactive.
describe difficult children (~10%)
glum, irregular in routines, resistant to change, and irritable.
what percentage of children did not fit clearly into one temperament category?
35% showed mixed temperamental traits.
how stable is temperament over time, according to the study?
temperament is generally stable, though some basic changes occur.
what long-term pattern was observed in difficult children?
they developed more emotional problems requiring counselling.
what influences individual differences in temperament?
heredity plays a large role.