Psychology 2080A/B Chapter 4: Chapter 4 Psychology Testing Textbook, 7th edition

• School: Western University
• Department: Psychology
• Course: Psychology 2080A/B
• Professor: Doug Hazlewood

Document Summary

Internal consistency: are you testing only the one thing you think are testing (a psychology test may turn into a reading test if the questions are difficult) Reliability- the thing we are interested in is not directly observable. Ability is not observable we infer it from behavior. Behavior is not transparent we cannot look at it and see your ability. O= matter of fact we can observe it. E= always present can be positive or negative. Fundamental principle: the more error there is in your measurements the less reliable those measurements are. Error of measurement is something"s negative and sometimes positive (e. g not enough sleep, too much noise) The more error there is in the measurement the more distance between scores. Error in measurements take away from reliability because it allows for more accounts of how you do on the same test. True score would be obtained if there were no error of measurement.