PSC 41 Lecture Notes - Lecture 8: Null Hypothesis, Anagram, Random Assignment
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PSC 41 Full Course Notes
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Procedure/experiment: students were brought into the lab [not a random. [independent variable aka manipulative variable: color] see red on the test (upper corner or on front) or see a color other than red (gray, green or black) [dependent variable aka measured variable: academic achievement] Measure: academic performance, amount of food eaten. Null hypothesis = there"s no effect of plate size on how much food you eat. [independent variable: bowl size] large bowl (comparison group) or medium calculated each individual performance compare performance across the two samples. Procedure/experiment: students were brought into the lab (not a random sample) bowl (comparison group) of them. Within an experiment researchers manipulate one variable and then measure another. Participants were randomly assigned to either condition. Hence, the only plausible reason why we see a difference in the measured variable is the original manipulation (hopefully) Why experiments support causal claims: covariance = indicates the degree to which two variables go together", or are related".
