PSYCH 10 Lecture Notes - Lecture 3: External Validity, Internal Validity, Natural Disaster
Document Summary
Controlled for by making sure experimental groups and control groups are similar with respect to confounding variables. Correlation: a statistical relationship between two variables. Two events occur together but do not cause one another. Internal validity: extent to which we can say the change in dv is due to the intervention/iv. External validity: extent to which findings can be generalized to the real world. High internal validity due to controlled settings usually leads to low external validity and vice versa. Spontaneous recovery/remission: change in people without apparent external reason. Maturation: growth of a person throughout a study. Measurement: act of being measured changes what is being measured. Asking people to monitor obsessive thoughts may change their relationship to them. Regression to the mean: people with extremes tend to revert back to the mean. Selection effects: groups are not well chosen. Attrition effects: subjects drop out of one group more than another for some reason skewed measurements.
