Statistical Analysis in Psychology



AP Psych Review Video 1.5Statistical Analysis in PsychologyDirections: Visit the AP Psych page on YouTube and watch Video 1.5. This lesson reviews content from Unit 1 and Chapter 1 of the Myers text. Complete the guided viewing notes and exit ticket to receive credit for today’s assignment.FRQ Review Last Lesson: Explain how Mrs. Schmidlap might study her research question:Independent VarOperational Def of DVConfounding VarEthical ConsiderationDefinitionDefinitionDefinitionDefinitionApplicationApplicationApplicationApplication SynonymsSynonymsSynonymsStatistics in ResearchWhat are Statistics?Two Types:Inferential Statistics Purpose:How do we show our Population?How do we denote our Sample?Random sampling doesn’t always lead to a representative sample - why?FRQ HINT:StatisticalSignificanceDefine:What does p represent?What does p<0.5 mean in psychology?How does the size of p relate to the significance of our results?Explain the negative correlation.Practice 1: Pause Video at 15:18 to Answer Before His Slide Pops Up!Mr. Reed’s results yield a p-value of .07 (p = 0.07)Is the difference significant?Level of Uncertainty = Level of Certainty?What Conclusion Can He Draw?Null HypothesisNull HypothesisWhy?Goal:1.2.Summary Chart:Can knowledge be inferred from a small sample to a larger population?Inferential ErrorDefine:Some examples: (ignoring statistics & drawing improper conclusions)Heuristics:Cognitive Biases:Outgroup Homogeneity:Check for Understanding: Stop video and try to answer before he does!Why inferential statistics?Descriptive StatisticsMeasures of Central TendencyMeanMedianModeHow do outliers skew your data?Which measure is most descriptive of set when data are skewed?Graphic Representations: Be mindful you can create simple representations of provided data as this is a specific skill set in the new curriculum. Frequency DistributionBar ChartHistogramX =Y = X (IV) = Y (DV) =X (IV) = Y (DV) =Measures of Variability (Dispersion)Define:Low V -High V -RangeStandard DeviationRelation b/t range & sd?Z-scoresUsed for:Clarence?Suzie?STOP! Practice Time:DarylJaneBillAP Exam Practice:Researchers conducted a study in which 10 participants went to a laboratory around dinner time. The researcher assigned students to one of two groups by flipping a coin. Half of the participants were assigned to a “large bowl” group, and half were assigned to a “small bowl” group. By luck of the draw, 4 men and 1 woman were in the “large bowl” group, and 4 women and 1 man were in the “small bowl” group. Participants were told they could take as much pasta as they wanted from the serving bowl in the middle of the table, which was kept at nearly a full level. Participants were encouraged to go back for as many helpings of pasta as they wanted. In order to determine how much food each participant actually ate, the researchers measured the weight of the food that each participant took, as well as the amount that the participants left in the bowls.The amount of pasta (in grams) each participant ate is shown in the table below:Large BowlSmall Bowl424258376387445196274148202250Mean: 378Mean: 214Std. Dev.: 72.6Std. Dev.: 49.3Part A: Determine the median of the “large bowl” group.Which group has a smaller range? Explain how the smaller range related to the standard deviation.Convert this frequency distribution table into a chart. (Correctly label the x and y axis)Exit Ticket:I Feel Confident/Better About:But I Still Have Questions Surrounding: ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download