Final Flashcards
Describe the longitudinal design
Description: investigator studies the same group of participants repeatedly at different ages
* changes are noted as as participants grow older
* can be short or long
Strengths:
* researchers can identify common patterns as well as individual differences in development
* researchers can examine relationships between early and later events and behaviors
Cons:
* participants move away or drop out
* participants revise their own thought feelings and actions
* the biggest con that threats the accuracy of longitudinal designs are cohort effects (individuals developing in the same time period, who are influenced by particular historical and cultural conditions)
- for example if a longitudinal study was done on the development of infants during 2020, it may not be generalized or accurate because they went through a global pandemic during that time. Their development may be different from that of children born years after Covid19
Cross-Sectional Design
- groups of people differing in age are studied at the same point in time
What design allows you to infer the cause and effect?
Experimental
- Through random assignment of participants to treatment conditions, the investigator manipulates an independent variable and examines its effect on a dependent variable
Example: researchers explored the impact of adults’ angry interactions on children’s adjustment . They hypothesized that the way angry encounters end (independent variable) affects children’s emotional reactions (dependent variable). Four- and 5-year-olds were brought one at a time to a laboratory, accompanied by their mothers. One group was exposed to an unresolved-anger treatment, in which two adult actors entered the room and argued but did not work out their disagreements. The other group witnessed a resolved-anger treatment, in which the adults ended their disputes by apologizing and compromising.
General and Experimental Designs
GENERAL
Correlational: The investigator obtains information on participants without altering their experiences.
Experimental: Through random assignment of participants to treatment conditions, the investigator manipulates an independent variable and examines its effect on a dependent variable.
DEVELOPMENTAL:
Longitudinal: The investigator studies the same group of participants repeatedly at different ages.
Cross-Sectional: The investigator studies groups of participants differing in age at the same point in time
Sequential: The investigator conducts several similar cross-sectional or longitudinal studies (called sequences). These might study participants over the same ages but in different years, or they might study participants over different ages but during the same years.
What does a correlation tell you?
- The relationship between two variables.
Correlation Coefficient: A number, ranging from +1.00 to –1.00, that describes the strength and direction of the relationship between two variables.
How can development be viewed in a continuous way? What about discontinuous?
Continuous: The view that development is a process of gradually augmenting the same types of skills that were there to begin with.
* change is gradual and ongoing
Discontinuous: The view that development is a process in which new ways of understanding and responding to the world emerge at specific times
* development takes place in stages
* change is fairly sudden
What is a sensitive period?
A time that is biologically optimal for certain capacities to emerge because the individual is especially responsive to environmental influences. Development can occur later, but it is harder to induce
Example: Language acquisition in early childhood. While there is a sensitive period for language learning (roughly during the first few years of life), it is still possible for children to learn a language later on, although it might take more effort or they might not achieve native-like proficiency
What do developmental scientists study?
Developmental scientists study the process of human development across the lifespan, examining how physical, cognitive, social, and emotional abilities change and interact with each other throughout life stages, including infancy, childhood, adolescence, adulthood, and old age; their research aims to understand the factors that influence these changes and how to optimize development in various contexts
Describe naturalistic observation
The naturalistic observation is a research method in which the investigator goes into the field, or natural environment, and records the behavior of interest
* it reflects participants every day lives
* investigators are able to directly see everyday behaviors
* the conditions under which participants are observed or not controlled
Example: an investigator might go to a daycare to observe children
Research methods: Systematic Observations
Naturalistic observation; in the natural environment where the behavior happens
- reflects participants everyday lives
- can not control conditions under which participants are observed
Structured observation; is controlled, in a lab where situation is set up to evoke behavior of interest
- may not yield observations typical of participants behavior in everyday life
Research Method: Clinical / Case Study
brings together a wide range of info on one person
interviews, observations, test scores
provides rich descriptive insights into factors that affect development
may be biased
can only be applied to participant in study
What are examples of age graded influences
Influences on lifespan development that are strongly related to age and therefore fairly predictable in when they occur and how long they last (can be influenced by biology or social customs)
- puberty
- menopause
- starting school
- getting driver’s license
- going to college
When we talk about the baby boomers who are we talking about? Why is this cohort significant?
- people born between 1946 and 1964
- this cohort is significant because
- the post–World War II period during which birth rates soared in most Western nations, with an especially sharp increase in the United States
- went through difficult development
- became known as the “me” generation bc they struggled for individual recognition during early years
What is the information processing view?
- regards people as actively making sense of their own thinking
- continuous cognitive growth in areas like…
- working memory: increases
- inhibition: improves
- attention: more selective
- planning: better organized
- strategies: more effective
- knowledge: increases
- metacognition (awareness of thought): expands
- cognitive self-regulation: improves
What is social learning theory?
According to social learning theory, moral behavior is acquired through modeling (also known as imitation or observational learning), just like any other set of responses.
* this is Banduras theory
What is the nature/nurture debate?
Disagreement among theorists about whether genetic or environmental factors are more important influences on development.
- By nature, we mean the hereditary information we receive from our parents at the moment of conception.
- By nurture, we mean the complex forces of the physical and social world that influence our biological makeup and psychological experiences before and after birth.
What is the age of viability?
Age of viability: The point at which the baby can first survive if born early, occurring sometime between 22 and 26 weeks.
Are monozygotic or dizygotic twins more genetically similar to ordinary siblings
Fraternal or dizygotic twins are no more alike than ordinary siblings
Monozygotic vs Dizygotic
* Identical/monozygotic - result when a single zygote separates to form two individuals
* Fraternal/dizygotic - result from the release and fertilization of two ova
What increases the risk of bearing a child with Down Syndrome?
Maternal Age!
Down Syndrome - most common chromosomal disorder
* failure of 21st chromosome to separate during meiosis
Define teratogens
any environmental agent that causes damage during prenatal period
Prescription and Nonprescription Drugs:
* Isotretinoin (acne treatment) - accutane is the most common
* Aspirin
* Caffeine
* Antidepressants
* Others include tobacco, alcohol, radiation, air pollution
Illegal Drugs:
Cocaine, heroine, and methadone, Marijuana
Factors Affecting Harm from Teratogens
Dose
Genetic Makeup (heredity)
Cumulative effect (other negative influences)
Age at time of exposure
- embryonic period
During what period do teratogens cause the most serious damage to the developing organism?
Embryonic Period
What does the APGAR refer to?
A rating system used to assess a newborn baby’s physical condition immediately after birth on the basis of five characteristics: appearance, pulse, grimace, activity, respiration
- a rating of 0, 1, or 2 on each of five characteristics is made at 1 minute and again at 5 minutes after birth
- a combined Apgar score of 7 or better indicates that the infant is in good physical condition
- measures color, heart rate, reflex irritability, muscle tone, respiratory effort
What is Kangaroo care?
Infant is carried around skin to skin
What can parents do to reduce the likelihood of SIDS (sudden infant death syndrome)
- put baby to sleep on their back
- don’t use drugs or smoke during prenatal period/after birth
- use light sleep clothes
- provide a firm sleep surface
- eliminate soft bedding