PSYC 1001 1st Edition Lecture 8 Outline of Last Lecture I. Design Studiesa. MethodsOutline of Current Lecture I. Design Studies (Continued)a. Surveyb. CorrelationCurrent LectureI. Survey: A technique for ascertaining self-reported attitudes or behaviors of people, usually by questioning a representative, a random sample of them.a. Population: All the cases in a group.b. Random Sample: A sample that fairly represents a population because each member has an equal chance of inclusion.c. Cannot let subjects seek researcher.d. Must assure a random selection.e. Advantages:i. Can get a lot of information quickly.ii. Can track changes in responses over time.iii. Can make predictions that are valid within certain limits.f. Disadvantages:i. Self-reports can be unreliable.1. Memory lapses/Déjà vu2. Wishful thinking3. Do not know how you would act4. Intentional Deceptiong. Cannot validly draw cause and effect conclusionsII. Correlation: A statistical measure of a relationship.III. Correlation Coefficient: A statistical measure of the extent to which two factors vary together.a. This is an actual number.b. Describes how well either factor predicts the other.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-1.0 0 +1.0c. This is the scale used for correlation coefficient and there can be different numbers spread across the scale to display the correlations.d. Numbers cannot go passed either end of the scale.e. Above 0 is a positive correlation and below 0 is a negative
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