What is Power?
 Power is the likelihood that an inferential statistical test will
correctly reject the null hypothesis
 Power is the likelihood of finding an effect when there is a real effect
What's the Problem with Low Power & Research?
 The power in past social science research has been estimated to average
approximately .60  i.e., it has only been able to detect real effects in
about 60% of studies
How Can I Increase Power?
 Increase the sample size (N)
 Increase the critical alpha (critical p level)
 Increase the effect size

Power Calculators
