PSYO 2000 Study Guide - Midterm Guide: Prior Probability, Confounding, Simple Random Sample

• School: Dalhousie University
• Department: Psychology
• Course: PSYO 2000
• Professor: Simon Gadbois

Document Summary

Sensitivity measures should be sensitive enough to detect differences in a characteristic that are important to the investigator. Specificity measures should be specific to the characteristics, group, etc. Accuracy = specificity + sensitivity (signal detection theory) Extraneous/confounded variables are a source precision consistency, reliability of the data reliability consistency precision validity does a variable represent what it intended systematic error errors solution. Blinding experimenter and participants do not know the assignment of treatments and control groups random error influence of the precision of measurements (consistency and reliability) Need enough data other tools- kappa, cronbach alpha reliability/consistency. Reliability refers to the precision of your measures assessment methods test-retest reliability/consistency stability of test scores over time. Repeated studies alternative (parallel) forms use of two lists in a memory test may not be easy. If scores are different something is not equal (in some ways the same)