Lesson ESSENTIAL QUESTIONS: In your Interactive Notebook: Unit.Lesson 1.4 Surveys, Correlations, & Basic Research Lesson ESSENTIAL QUESTIONS: ­­­How do psychologists report on and explain the data they collect? Daily Commentary: Please respond in classroom effective? Today’s Goals: Today’s Plan: Readings for this Lesson: Myers 39-44 Due this Lesson: PT 1.3 Readings for NEXT Lesson: Myers 46-49 Due NEXT Lesson: PT 1.3 REVIEW PACKET UNIT TEST: 9/21

Performance Task 1.3:

Statistical Reasoning Statistical procedures analyze and interpret data allowing us to see what the unaided eye misses. OBJECTIVE 15| Explain the importance of statistical principles, and give an example of their use in daily life. Composition of ethnicity in urban locales Psychology 7e in Modules

Independent Study Follow link in classroom and complete “descriptive statistics” module online. Submit my email at the end: Nicholas.GraberGrace@dpsnc.net

Describing Data A meaningful description of data is important in research. Misrepresentation may lead to incorrect conclusions. OBJECTIVE 16| Explain how graphs can misrepresent data. Psychology 7e in Modules

Data Set: Normal Distribution (bell curve for IQ)

Measures of Central Tendency Mode: The most frequently occurring score in a distribution. Mean: The arithmetic average of scores in a distribution obtained by adding the scores and then dividing by the number of scores that were added together. Median: The middle score in a rank-ordered distribution. OBJECTIVE 17| Describe three measures of central tendency and tell which is most affected by extreme scores. Psychology 7e in Modules

Measures of Central Tendency A Skewed Distribution

Measures of Variation Range: The difference between the highest and lowest scores in a distribution. Standard Deviation: A computed measure of how much scores vary around the mean. OBJECTIVE 18| Explain two measures of variation. Psychology 7e in Modules

Which punter would you want on your football team?   Mean Punt Standard Deviation Kicker A 37.5 yards +/- 14 yards Kicker B 33.0 yards +/-4

Standard Deviation

Percentiles Percentile ranks – 78% means you’ve done better than 78% of test takers You cannot score better than 100%; so 99% is the top percentile

Making Inferences A statistical statement of how frequently an obtained result occurred by experimental manipulation or by chance. Psychology 7e in Modules

When is an Observed Difference Reliable? Making Inferences When is an Observed Difference Reliable? Representative samples are better than biased samples. Less variable observations are more reliable than more variable ones. More cases are better than fewer cases. OBJECTIVE 19| Identify three principles for making generalizations from samples. Psychology 7e in Modules

When is a Difference Significant? Making Inferences When is a Difference Significant? When sample averages are reliable and the difference between them is relatively large, we say the difference has statistical significance. OBJECTIVE 20| Explain how psychologists decide whether differences are meaningful. Psychology 7e in Modules

Work on PT 1.3 How will you incorporate statistics and data into your experiment?

How to Answer a Psych FRQ Read the prompt twice. Identify the number of points available. Plan out how to earn each available point. Write in complete sentences. The grader will not read it and you will score a zero if you don’t. Name and apply each required term in the prompt. When responding to each section of the prompt, make sure the reader knows that you are doing so by restating that part of the prompt. Simple definitions will not score. You must provide examples that illustrate your understanding of the term. Move on. This is not an english or history essay. This is pinball Once you feel you have earned a point, stop explaining that concept and move on. You cannot earn a point twice.

PRACTICE FRQ Dr. Green is interested in studying what causes individuals to have distinct preferences in the type of music they listen to. Write a short memo for Dr. Green in which you consider the strengths and/or weaknesses of each research type listed below; then make a recommendation of which you think would be most effective. Naturalistic observation Survey Case study Cross sectional study Longitudinal study Experiment In addition, your memo should include a note that: Defines and explains the importance of one control on experiments Describes the Hawthorne Effect and indicates why Dr. Green should be wary of it

FRQ Review If you think you earned the point, read your response for that section. WHOLE CLASS: As soon as they have earned the point, yell “BANG!” RUBRIC: NO S CS C-SS LS E C HE

DQ’S, Updates & Reminders BIG PICTURE Friday Quizzes today & September 6 Projects Due Thursday, September 5th Experiment Project Unit Exam: Tuesday, 9/10 Today: DC & Discussion PsychSim5 Lecture Stats Practice Work Time: Experiments Tonight’s Homework: RJ 1.7 Myers 44-49 NOT IN GRIGGS Finish Projects; you will present tomorrow Do Statistics Worksheet