<span>Jill is an 8-year-old girl who is having a birthday party. according to freud, since Jill is in the latency period, you would expect that mostly girls are to be at her party.
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<span>Latency is the fourth stage of psychosexual development in Freud’s psychoanalytic theory. It happens about 5 years to puberty. At this period, a child represses sexual urges so the child prefers to associate with members of the same sex.</span>
 
        
        
        
The balloon begins to loose pressure.
        
             
        
        
        
The answer here is meta-analysis.
We can see here that Dr O'Connor is using meta-analysis because she is examining the 170 studies that have been done on the topic to find out the truth that lies behind theses similar studies. Meta-analysis in essence is a statistical analysis done on the results of the previous studies on a certain topic or in a certain field as it combines all of those findings to get an overall result.   
        
                    
             
        
        
        
<span>The sinking of the Lusitania liner.</span>