lOMoARcPSD|18482020
Psyo 1011 Sept. 11th - Lecture notes 2
Intro to Psyo & Nesc I (Dalhousie University)
Studocu is not sponsored or endorsed by any college or university
Downloaded by Abdel Ghanem ()
, lOMoARcPSD|18482020
PSYO 1011 – Sept. 11th
Quiz 1 – sept 11th
Know words in bold
Understand major concepts
Sampling Bias:
Must be representative population
“who did they ask?” “how many people did they ask”
How can we study behavior scientifically?
1. Observation
You are studying their behavior under natural conditions.
Taking notes
You don’t need a hypothesis
You just look at the behavior and let the thoughts flow.
2. Correlation
Examine how often 2 phenomena vary in relation to one
another.
Doesn’t imply causality.
For example, parental neglect doesn’t have to cause
antisocial behavior.
Correlation allows you to make predictions but not causality.
With any correlation: two variables may be related because of
a third, unrelated variable.
Positive correlation: when one variable increases, the other also
increases.
Negative correlation: when one variable increases, the other decreases.
Pearson’s Correlation Coefficient: a strength of correlation between two
variables. Can be used for prediction, even if causal link isn’t
understood.
R= 1.0 -10 (positive correlation negative correlation)
R=0 (no correlation)
Downloaded by Abdel Ghanem ()
Psyo 1011 Sept. 11th - Lecture notes 2
Intro to Psyo & Nesc I (Dalhousie University)
Studocu is not sponsored or endorsed by any college or university
Downloaded by Abdel Ghanem ()
, lOMoARcPSD|18482020
PSYO 1011 – Sept. 11th
Quiz 1 – sept 11th
Know words in bold
Understand major concepts
Sampling Bias:
Must be representative population
“who did they ask?” “how many people did they ask”
How can we study behavior scientifically?
1. Observation
You are studying their behavior under natural conditions.
Taking notes
You don’t need a hypothesis
You just look at the behavior and let the thoughts flow.
2. Correlation
Examine how often 2 phenomena vary in relation to one
another.
Doesn’t imply causality.
For example, parental neglect doesn’t have to cause
antisocial behavior.
Correlation allows you to make predictions but not causality.
With any correlation: two variables may be related because of
a third, unrelated variable.
Positive correlation: when one variable increases, the other also
increases.
Negative correlation: when one variable increases, the other decreases.
Pearson’s Correlation Coefficient: a strength of correlation between two
variables. Can be used for prediction, even if causal link isn’t
understood.
R= 1.0 -10 (positive correlation negative correlation)
R=0 (no correlation)
Downloaded by Abdel Ghanem ()
