Lecture 5.Experimental Method 1

Environmental conditions created by the researcher to

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: nt to which the results of a study can be generalized from a specific sample to a larger population ◦  Ecological Validity – the extent to which the results of an experiment can be generalized from the set of environmental conditions created by the researcher to other environmental conditions (to other settings and conditions)   The Example of Eyewitness Memory ◦  Lab experiments have excellent internal validity but often suffer from problems with external validity 5 5/20/13   Lab experiments have shown that people’s memories are not always accurate and that they can be biased by the act of suggestion. Does this mean we should not trust the memories of real eyewitness to actual crimes? a)  Yes b)  No   The Example of Eyewitness Memory ◦  Lab experiments have excellent internal validity but often suffer from problems with external validity ◦  Simulation studies often have good internal validity and better external validity than lab experiments (but not as good as field studies) ◦  Field studies have excellent external validity but may suffer from problems with internal validity What Would You Do? Bike Thief http://www.youtube.com/watch?v=S0kV_b3IK9M 6 5/20/13   The Example of Eyewitness Memory ◦  Lab experiments have excellent internal validity but often suffer from problems with external validity ◦  Simulation studies often have good internal validity and better external validity than lab experiments (but not as good as field studies) ◦  Field studies have excellent external validity but may suffer from problems with internal validity   Multiple Methods – because of this trade-off it is best to use multiple methods to address our research questions 7...
View Full Document

This note was uploaded on 01/23/2014 for the course PSYC 217 taught by Professor Victoria during the Winter '11 term at UBC.

Ask a homework question - tutors are online