PSY100H1 Lecture Notes - Lecture 2: Statistical Significance, Applied Science, Internal Validity
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PSY100H1 Full Course Notes
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Perhaps this part of the population entails people of the same sort of personality. 1 = perfect negative correlation, negative relationship to each other. +1 = perfect positive correlation, there is a relationship with each other: correlational research cannot prove a causal relationship of self-selection. Self-selection: a problem that arises when the participant, rather than the investigation, selects his or her own level on each variable, bringing with this value unknown other properties that make causal interpretation of a relationship difficult. For example, in the time magazine study, the investigators could not choose whether a given person was married or not; participants either were or weren"t. And the investigators didn"t know whether other qualities the participants brought along with his or her marital status- happiness, sadness, etc. Causality: the best way to be sure about causality is to conduct an experiment. 53-54: external validity: refers to how closely the experimental setup resembles real-life situations.
