Psych 120 Exam 1 (A+ GRADED)

true experiment correct answers an experiment that allows us to identify cause and effect. correlational research correct answers aim to discover if different characteristics of people are associated with each other. -gives us a correlation coefficient percent of variance correct answers squared correlation coefficient. -how one variable is predicted by the knowledge of the other. multiple determination correct answers the way things actually are, the concept that more variables are causing the outcome causal modelling correct answers aka path analysis, medical procedure that has been developed to help clarify cause and effect when variables are measured rather then manipulated. -must have a multivariate approach reliability correct answers scores that can be generalized, high degree of correlation among the items on a measure and the individual taking the test response in a consistent manner across times. how to test for reliability? Correct answers internal consistency internal consistency correct answers divide each scale in half and then correlate the scores on the two halves with each other. -gives split half reliability -doesn't guarantee stability coefficient alpha correct answers score given from split half reliability, its the average of all possible split half reliability for the scale. how to test for stability? Correct answers test- retest reliability Test retest reliability correct answers give the test twice to the same group of people and then correlate the scores from times one and two .80 + is good -gives inter rate reliability Factors that influence tests reliability correct answers 1. clarity of items 2. motivation for test takes 3. number of items psychometric correct answers indicates that the more items there are on a test, the more likely that people will have a large range of scores (high variance) Validity correct answers actually measuring what we are measuring. -having criterion that is clear and observable