PSYC 2250 Chapter Notes - Chapter 5: Pearson Product-Moment Correlation Coefficient, Spread Betting, Inter-Rater Reliability

• School: University of Manitoba
• Department: Psychology
• Course: PSYC 2250
• Professor: Hladkyj

Document Summary

Operational definitions are specific methods used to manipulate or measure the variable. Ex) operationally define satisfaction would be to ask people how satisfied why feel in a relationship using a scale ranging from 1 (not at all satisfied) to 9 (very satisfied) Using this they are able to predict whether people were still in that same romantic relationship after four months. The primary criteria researchers use to evaluate the quality of their own and each other"s operational definitions: reliability and validity. This discussion will refer to self- report measures (also called scales) Psychologists use self - report measures to study psychological attributes such as intelligence, self- esteem, extraversion, and depression, and alibies, attributes, potential. When doing research in these areas, its easier to use existing measures of psychological characteristics rather than developing your own (and compare your findings with prior research) Have reliability and validity data to help decide which measure to use.