Welcome to AP Psych Today we’ll talk about research 9/7 and 9/8.

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Presentation transcript:

Welcome to AP Psych Today we’ll talk about research 9/7 and 9/8

Please sit with your group that you worked with last time (on study skills) You will share today if needed then do some stats together.

Which of the following correlation coefficients presents the strongest relationship between the variables? a..02 b c..55 d. -.14

The correct answer was b. Which of coefficents shows the weakest relationship? a..02 b c..55 d. -.14

A

Asurvey found that people who often ate Frosted Flakes as children had half the cancer rate of those who never ate the cereal. Conversely, those who often ate oatmeal as children were four times more likely to develop cancer than those who did not. Does this mean that Frosted Flakesprevents cancer while oatmeal causes it? suggest explanations forthese correlations.

The answer? Cancer tends to be a disease of later life. Those who ate Frosted Flakes are younger. In fact, the cereal was not around when older respondents were children, and so they are much more likely to have eaten oatmeal.

In the New Hebrides islands, body lice were at one time thought to produce goodhealth. Why did they think that? Bc When people became ill, their temperatures rose and caused the body lice to seek more hospitable abodes. Both the lice and good health departed with the onset of the fever.

How far would you go for science In the early twentieth century, thousands ofAmericans in the South died from pellagra, a disease marked by dizziness, lethargy,running sores, and vomiting. Finding that families struck with the disease often had poor plumbing and sewage, many physicians concluded that pellagra was transmitted by poor sanitary conditions. In contrast, Public Health Service doctor Joseph Goldberger thought that the illness was caused by an inadequate diet. But a correlation arose because the economically disadvantaged were likely to have poor diets as well as poor plumbing. How was the controversy resolved? The answer demonstrates the importance of the experimental method. Finally he selected two patients—one with scaling sores and the other with diarrhea. He scraped the scales from the sores, mixed the scales with four cubic centimeters of urine from the same patients, added an equal amount of liquid feces, and rolled the mixture into little dough balls by the addition of four pinches of flour. The pills were taken voluntarily by him, by his assistants and by his wife. None of them came down with pellagra. To further make his case, Goldberger asked two groups from a Mississippi state prison farm to volunteer for an experiment. One group was given the high-carbohydrate, low-protein diet that Goldberger suspected to be the culprit, while the other group received a balanced diet. Within months, the former group was ravaged by pellagra, while the latter showed no signs of the disease (Stanovich, 1998,as cited in Fineburg, 2003).

Student Handout: Charting Correlations on Scatterplots Directions: Chart the following data pairs on the graph below. Indicate whether the data resemble a positive correlation, negative correlation, or zero correlation.

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