module 1.1 themes & methods in developmental psychology
1. what themes exist in developmental psychology?

2. how do we study development?
a. longitudinal studies:

b. cross - sectional studies:

module 1.2a physical development across the lifespan: prenatal development, infancy, & childhood
3. stages of prenatal development
| stage | time | description |
| ---- | ---- | ---- |
| conception → zygote | | - zygote: |
| embryo | | - embryo:
- placenta: |
| fetus | | - threshold of viability (around 23 weeks): |

Question

module 1.1 themes & methods in developmental psychology
1. what themes exist in developmental psychology?

2. how do we study development?
   a. longitudinal studies:

b. cross - sectional studies:

module 1.2a physical development across the lifespan: prenatal development, infancy, & childhood
3. stages of prenatal development
| stage | time | description |
| ---- | ---- | ---- |
| conception → zygote |  | - zygote: |
| embryo |  | - embryo:
   - placenta: |
| fetus |  | - threshold of viability (around 23 weeks): |

Accepted Answer

# Brief Explanations: 1. For the themes in developmental psychology, core established themes cover key developmental tensions and focuses. 2. For research methods, longitudinal and cross-sectional are primary developmental study designs, each with distinct approaches. 3. For prenatal stages, each stage has a defined timeline and key structural/functional traits. # Answer: 1. What themes exist in developmental psychology? - Nature vs. Nurture: Influence of genetics vs. environment - Continuity vs. Discontinuity: Gradual vs. stage-based growth - Stability vs. Change: Trait consistency over time - Universal vs. Context-Specific Development: Shared vs. culture/context-unique growth - Multidirectional Development: Some skills grow, others decline 2. How do we study development? a. Longitudinal studies: - Follow a single group repeatedly over time to track individual development changes. b. Cross-sectional studies: - Compare different age groups at a single point in time to identify age-related differences. 3. Stages of Prenatal Development | Stage | Time | Description | |---------------------|-----------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | Conception → Zygote | Weeks 1-2 (post-conception) | - zygote: A single cell formed by the fusion of sperm and egg; undergoes rapid cell division, travels to the uterus and implants in the uterine wall. | | Embryo | Weeks 3-8 (post-conception) | - embryo: The developing organism; major organs and bodily structures (nervous system, heart, limbs) begin to form.
- placenta: A specialized organ that forms to transfer nutrients, oxygen, and waste between mother and embryo. | | Fetus | Weeks 9 to birth | - threshold of viability (around 23 weeks): The earliest point when the fetus has a chance of surviving outside the uterus, as key organs (lungs, brain) are developed enough to sustain basic life functions; the fetus continues to grow in size and refine organ function until birth. |

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QUESTION IMAGE

Question

Explanation:

Answer:

Stage	Time	Description
Embryo	Weeks 3-8 (post-conception)	- embryo: The developing organism; major organs and bodily structures (nervous system, heart, limbs) begin to form.<br>- placenta: A specialized organ that forms to transfer nutrients, oxygen, and waste between mother and embryo.
Fetus	Weeks 9 to birth	- threshold of viability (around 23 weeks): The earliest point when the fetus has a chance of surviving outside the uterus, as key organs (lungs, brain) are developed enough to sustain basic life functions; the fetus continues to grow in size and refine organ function until birth.