Lec 4-6 Development

# Lec 4-6 Development - A d m in is t r a t iv e S t u f f On...

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Administrative Stuff I-Clicker - set frequency to DD Graded Quiz 1 - now available Due Wednesday 9/1 by 8am Register for subject pool Psych 290 Recruiting Fair: Tuesday 8/31, 4-5 in the Atrium On your own: Chp. 2 topics to know for the midterm exam Confounds Sampling procedures Random samples and random assignment Research ethics Google search Milgram experiment video Validity and reliability Collected the data…now what? Statistics and Psychological Research Inferential Statistics Help researchers make inferences about their data Descriptive Statistics Describe and summarize the data set Descriptive Statistics Important measures Measures of central tendency Measures of variability Correlation coefficients

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Descriptive Statistics: Central Tendency Data: 3, 3, 4, 5, 6, 7, 7, 7, 8, 10 Mode: Score that occurs most frequently Median: Halfway point in data set Each score counted equally Mean: Arithmetic average Sensitive to extreme scores 7 6 6 Data: Is yawning contagious? See yawner No yawner 7 8 8 9 14 19 20 1 3 6 6 10 11 13 Mode : 8 Mode : 6 Median : 9 Median : 6 Mean : Sum/N = 85/7 = 12.14 Mean : = 50/7 = 7.14 Variability Measures Range Difference between highest and lowest value Max - Min = 300 - 100 = 200 Standard Deviation Average difference between each score and the mean 50, 51, 49, 52, 48 = Low Standard Deviation 50, 60, 70, 40, 30 = High Standard Deviation Inferential Statistics Way to interpret descriptive statistics Tests of significance Difference between 2 groups is greater than the difference expected by chance alone
Is yawning contagious? Writing Assignment 1 Find the relevant statistics and then write a brief 1-2 sentences about what we can conclude based on the data Developmental Psychology The course and causes of developmental changes over a person’s lifetime

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Development is a result of Nature and Nurture Nature vs. Nurture Outline for Human Development How do we develop physically? How do we develop cognitively? How do we develop socially and morally? How do we change in adulthood? On your own Prenatal Development Germinal Stage (0-2 weeks) Zygote: Forms when sperm and ovum merge Duplicates into many cells
Embryonic Stage (2-8 weeks) Organs and body parts are created Critical period in prenatal development Most important time to avoid any harmful substances Fetal Stage (8 weeks - birth) Organ systems grow and function 3rd month: movement 6th month: eyelids open, could survive at birth

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## This note was uploaded on 03/10/2011 for the course PSYCH 100 taught by Professor Suarez during the Spring '09 term at University of Illinois, Urbana Champaign.

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Lec 4-6 Development - A d m in is t r a t iv e S t u f f On...

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