Class Notes (1,100,000)

US (470,000)

UCLA (10,000)

PSYCH (600)

PSYCH 100A (100)

Reise Steven (20)

Lecture 3

Department

PsychologyCourse Code

PSYCH 100AProfessor

Reise StevenLecture

3This

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Psych100A Week2

Lecture2-1!

-Fatigue in Cancer Survivors!

•Independent variable and dependent variable !

-Change in fatigue: outcome!

-yoga/education intervention: treatment!

•Random assignment, but not a random sample!

-Is sample representative for the population — external validity!

•Statistics!

-P value: the outcome due to the random chance!

-d: standard deviation!

-Sample v.s. Population!

•Distribution Triad!

-Distribution of scores in the population!

-Distribution of scores in the sample (inference) !

-Distribution of sample statistics over repeated experiments (sampling variability)!

•Sample distribution is not population!

•As N increases, Statistics —> parameters!

•Data Generating Process in the Population!

•Data generating process <— causes of all the variation <— statistics to reveal!

•DGP is unknown to us!

•Data —> DGP: bottom-up strategy (from concrete to abstract)!

•DGP —> Data: top-down strategy (How probable is your data given your hypo!

•Sampling variability!

-The sample result may or may not reﬂect something!

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