PS101 Lecture Notes - Lecture 4: Dependent And Independent Variables, Null Hypothesis, Myelin
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What is a correlation: involves measuring and determining the relation between two variables, (co-relation relation of 2 things, e. g number of friends) Correlation compared to descriptive methods: more rigorous in terms of control, empirical measurement and statistical analysis, still no causation, (arm length and height) Kinds of correlations: positive correlation: as one variable goes up the other does too (e. g. study times and grades, happiness and helpfulness, income and education. So about causation: seems sensible that study time predicts performance, these things co-occur, negative correlation: increases in one variable and decreases in another. #1: because you can have access to two pieces of information but may not be able to. Thursday, september 21, 2017 manipulate the variables: first step in the inferential process. Why can"t you infer cause: potential other factors, third variable (extraneous variable) Neurons: highly specialized cells that carry messages throughout the nervous system, electrochemical exchange-both electrical and chemical, di er in shape and size and function.
