Developmental Psychology, Week 1 notes
Developmental Psychology, Week 1 notes PSY 266
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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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