PSYC 2360 Chapter Notes -Statistical Conclusion Validity, Null Hypothesis, Internal Validity
1 Aug 2013
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Construct validity - measuring thing you think you are measuring. Statistical conclusion validity - whether or not you are rejecting null hypothesis and how often you are incorrect in doing so. Internal validity - to what extent you can conclude independent variable is causing dependent variable. External validity - extent to which results can be generalized beyond the specific way of the original experiment. Can reason about it, things that tend to have better external validity : large sample sizes that characterize the population at large, evolutionary psychology - we have faster perception of colour red. Things that vary between cultures are hard to generalize and say it has high external validity. What is different about this population compared to other populations. Problem with using college students - might be cognitively different, have a higher need for approval: empirical question. Go and find out - much easier to do.
