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Developmental Psychology, Week 1 notes

by: Bailey Anderson

Developmental Psychology, Week 1 notes PSY 266

Marketplace > Indiana State University > Psychology > PSY 266 > Developmental Psychology Week 1 notes
Bailey Anderson
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About this Document

Notes for week of 8/22 Covers prenatal development
Development Psy
Dr. Caitlin C. Brez
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This 1 page Class Notes was uploaded by Bailey Anderson on Tuesday August 23, 2016. The Class Notes belongs to PSY 266 at Indiana State University taught by Dr. Caitlin C. Brez in Fall 2016. Since its upload, it has received 75 views. For similar materials see Development Psy in Psychology at Indiana State University.


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Date Created: 08/23/16
Developmental Psychology Week 1 Prenatal Development  Chromosomes: located in cell nucleus­ 23 pairs  Genes: on chromosomes o Segments of DNA that provide instructions for development o Genotype: genetic traits o Phenotype: genotype + environment  Example: may have gene for mental disorder but may or may not show or  have mental disorder o Gene­Environment Interaction  Tryon’s (1940) maze­running rats Selectively bred “bright” and “dull” rats over 7 generations. They studied  how quickly a rat can find a platform in water and remember where it is  when put back in the water. They bred 7 generations of bright + bright or  dull + dull. Bright rats were faster through all generations.  Cooper & Zubek (1958) follow­up: did the same thing with the same  results. Other experiment: They produced two different environments. Half of the  bright and half of dull rats were put in a fun interactive environment with a lot of other rats. The others were put in a boring environment with few  other rats. Rats that were put in the boring environment: the bright rats did better. In the fun environment: both kind of rats did the same.  Conception: o Zygote: conception­ about 5 to 7 days, dividing into more cells and moving o Blastocyst: lasts a few days, implants into uterine lining o Embryo: lasts 8 weeks, starts at implantation o Fetus: 8 weeks on  Timeline for an embryo: o Day 16­17: heart and major blood vessels begin to form o Day 20: heart begins to pump fluid o Day 21: first red blood cells appear o 3 weeks after fertilization: organ formation begins o 8 weeks after fertilization: almost all organs are completely formed


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